UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-7139

Fidelity Hereford Street Trust
(Exact name of registrant as specified in charter)

82 Devonshire St., Boston, Massachusetts 02109
(Address of principal executive offices) (Zip code)

Scott C. Goebel, Secretary

82 Devonshire St.

Boston, Massachusetts 02109
(Name and address of agent for service)

Registrant's telephone number, including area code: 617-563-7000

Date of fiscal year end:	April 30

Date of reporting period:	April 30, 2009

Item 1. Reports to Stockholders

Fidelity®

Money Market

Fund

Annual Report

April 30, 2009
(2_fidelity_logos) (Registered_Trademark)

Chairman's Message	<Click Here>	Ned Johnson's message to shareholders.
Shareholder Expense Example	<Click Here>	An example of shareholder expenses.
Investment Changes/ Performance	<Click Here>	A summary of major shifts in the fund's investments over the past six months and one year.
Investments	<Click Here>	A complete list of the fund's investments.
Financial Statements	<Click Here>	Statements of assets and liabilities, operations, and changes in net assets, as well as financial highlights.
Notes	<Click Here>	Notes to the financial statements.
Report of Independent Registered Public Accounting Firm	<Click Here>
Trustees and Officers	<Click Here>
Distributions	<Click Here>

To view a fund's proxy voting guidelines and proxy voting record for the 12-month period ended June 30, visit http://www.fidelity.com (search for "proxy voting guidelines") or visit the Securities and Exchange Commission's (SEC) web site at http://www.sec.gov. You may also call 1-800-544-8544 to request a free copy of the proxy voting guidelines.

Standard & Poor's, S&P and S&P 500 are registered service marks of The McGraw-Hill Companies, Inc. and have been licensed for use by Fidelity Distributors Corporation.

Other third party marks appearing herein are the property of their respective owners.

All other marks appearing herein are registered or unregistered trademarks or service marks of FMR LLC or an affiliated company.

This report and the financial statements contained herein are submitted for the general information of the shareholders of the fund. This report is not authorized for distribution to prospective investors in the fund unless preceded or accompanied by an effective prospectus.

A fund files its complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. Forms N-Q are available on the SEC's web site at http://www.sec.gov. A fund's Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, DC. Information regarding the operation of the SEC's Public Reference Room may be obtained by calling 1-800-SEC-0330. For a complete list of a fund's portfolio holdings, view the most recent holdings listing, semiannual report, or annual report on Fidelity's web site at http://www.fidelity.com or http://www.advisor.fidelity.com, as applicable.

NOT FDIC INSURED · MAY LOSE VALUE · NO BANK GUARANTEE

Neither the fund nor Fidelity Distributors Corporation is a bank.

Annual Report

Chairman's Message

(photo_of_Edward_C_Johnson_3d)

Dear Shareholder:

Although there has been some encouraging news in the capital markets this spring, many economic uncertainties remain - including still-weak corporate earnings and sluggish consumer spending - which could call into question the sustainability and overall strength of the markets' recent forward momentum. Financial markets are always unpredictable, of course, but there also are several time-tested investment principles that can help put the historical odds in your favor.

One of the basic tenets is to invest for the long term. Over time, riding out the markets' inevitable ups and downs has proven much more effective than selling into panic or chasing the hottest trend. Even missing only a few of the markets' best days can significantly diminish investor returns. Patience also affords the benefits of compounding - of earning interest on additional income or reinvested dividends and capital gains. There can be tax advantages and cost benefits to consider as well. While staying the course doesn't eliminate risk, it can considerably lessen the effect of short-term declines.

You can further manage your investing risk through diversification. And today,

more than ever, geographic diversification should be taken into account. Studies indicate that asset allocation is the single most important determinant of a portfolio's long-term success. The right mix of stocks, bonds and cash - aligned to your particular risk tolerance and investment objective - is very important. Age-appropriate rebalancing is also an essential aspect of asset allocation. For younger investors, an emphasis on equities - which historically have been the best-performing asset class over time - is encouraged. As investors near their specific goal, such as retirement or sending a child to college, consideration may be given to replacing volatile assets (e.g. common stocks) with more-stable fixed investments (bonds or savings plans).

A third principle - investing regularly - can help lower the average cost of your purchases. Investing a certain amount of money each month or quarter helps ensure you won't pay for all your shares at market highs. This strategy - known as dollar cost averaging - also reduces "emotion" from investing, helping shareholders avoid selling weak performers just prior to an upswing, or chasing a hot performer just before a correction.

We invite you to contact us via the Internet, through our Investor Centers or by phone. It is our privilege to provide you the information you need to make the investments that are right for you.

Sincerely,
/s/Edward C. Johnson 3d

Edward C. Johnson 3d

Annual Report

Shareholder Expense Example

As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, and (2) ongoing costs, including management fees and other Fund expenses. This Example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The Example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period (November 1, 2008 to April 30, 2009).

Actual Expenses

The first line of the accompanying table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000.00 (for example, an $8,600 account value divided by $1,000.00 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. A small balance maintenance fee of $12.00 that is charged once a year may apply for certain accounts with a value of less than $2,000. This fee is not included in the table below. If it was, the estimate of expenses you paid during the period would be higher, and your ending account value lower, by this amount.

Hypothetical Example for Comparison Purposes

The second line of the accompanying table provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. A small balance maintenance fee of $12.00 that is charged once a year may apply for certain accounts with a value of less than $2,000. This fee is not included in the table below. If it was, the estimate of expenses you paid during the period would be higher, and your ending account value lower, by this amount.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transaction costs. Therefore, the second line of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds.

	Annualized Expense Ratio	Beginning Account Value November 1, 2008	Ending Account Value April 30, 2009	Expenses Paid During Period* November 1, 2008 to April 30, 2009
Actual	.46%	$ 1,000.00	$ 1,007.80	$ 2.29
Hypothetical (5% return per year before expenses)		$ 1,000.00	$ 1,022.51	$ 2.31

* Expenses are equal to the Fund's annualized expense ratio, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period).

Annual Report

Investment Changes/Performance (Unaudited)

Maturity Diversification
Days	% of fund's investments 4/30/09	% of fund's investments 10/31/08	% of fund's investments 4/30/08
0 - 30	30.8	47.2	51.9
31 - 90	43.6	36.6	37.4
91 - 180	15.4	11.5	6.1
181 - 397	10.2	4.7	4.6
Weighted Average Maturity
	4/30/09	10/31/08	4/30/08
Fidelity Money Market Fund	78 Days	52 Days	51 Days
All Taxable Money Market Funds Average *	49 Days	42 Days	46 Days

Asset Allocation (% of fund's net assets)
As of April 30, 2009		As of October 31, 2008
	Corporate Bonds 1.2%		Corporate Bonds 0.0%
	Commercial Paper 13.7%		Commercial Paper 16.0%
	Bank CDs, BAs, TDs, and Notes 62.5%		Bank CDs, BAs, TDs, and Notes 72.5%
	Government Securities ^† 21.0%		Government Securities 8.5%
	Repurchase Agreements 2.2%		Repurchase Agreements 6.3%
	Net Other Assets** (0.6)%		Net Other Assets** (3.3)%

fid76717

^† Includes FDIC Guaranteed Corporate Securities

** Net Other Assets are not included in the pie chart.

Current and Historical Seven-Day Yields

	4/28/09	2/3/09	10/28/08	7/29/08	4/29/08
Fidelity Money Market Fund	0.85%	1.34%	3.08%	2.45%	2.67%

Yield refers to the income paid by the fund over a given period. Yields for money market funds are usually for seven-day periods, as they are here, though they are expressed as annual percentage rates. Past performance is no guarantee of future results. Yield will vary and it is possible to lose money by investing in the fund.

* Source: iMoneyNet, Inc.

Annual Report

Investments April 30, 2009

Showing Percentage of Net Assets

Corporate Bonds - 1.2%
	Due Date	Yield (a)	Principal Amount (000s)	Value (000s)
LP Pinewood SPV LLC
	5/7/09	0.75% (d)	$ 11,700	$ 11,700
Roche Holdings, Inc.
	9/18/09	1.91 (e)	89,250	89,250
TOTAL CORPORATE BONDS				100,950
Certificates of Deposit - 44.5%

Domestic Certificates Of Deposit - 0.7%
State Street Bank & Trust Co., Boston
	5/22/09 to 6/18/09	1.00 to 1.25	65,000	65,000
London Branch, Eurodollar, Foreign Banks - 11.7%
Commonwealth Bank of Australia
	6/29/09	0.49	29,000	29,000
Credit Agricole SA
	5/6/09 to 10/22/09	1.10 to 1.20	175,000	175,000
Credit Industriel et Commercial
	5/19/09 to 7/16/09	1.18 to 1.50	158,000	158,000
Danske Bank AS
	6/24/09 to 6/29/09	0.60 to 0.61	58,000	58,001
HSBC Bank PLC
	6/3/09 to 10/30/09	1.00 to 1.05	117,000	117,000
ING Bank NV
	5/13/09 to 7/16/09	1.00 to 1.15	159,000	159,000
Landesbank Hessen-Thuringen
	6/3/09 to 7/23/09	1.15 to 1.50	44,000	44,000
National Australia Bank Ltd.
	5/11/09 to 11/5/09	1.00 to 1.05	115,000	115,000
UniCredit SpA
	5/5/09 to 6/5/09	0.90 to 1.50	185,000	185,000
				1,040,001
New York Branch, Yankee Dollar, Foreign Banks - 32.1%
Banco Bilbao Vizcaya Argentaria SA
	6/2/09	1.00	15,000	15,000
Certificates of Deposit - continued
	Due Date	Yield (a)	Principal Amount (000s)	Value (000s)
New York Branch, Yankee Dollar, Foreign Banks - continued
Bank of Montreal
	5/7/09 to 5/26/09	0.99 to 1.02% (d)	$ 97,000	$ 97,000
Bank of Nova Scotia
	6/5/09 to 9/9/09	1.00 to 1.57 (d)	232,000	232,000
Bank of Scotland PLC
	5/6/09	1.47 (d)	161,000	161,000
Bank Tokyo-Mitsubishi UFJ Ltd.
	5/21/09 to 7/23/09	0.77 to 1.10	189,000	189,000
Barclays Bank PLC
	5/11/09 to 5/20/09	1.09 to 1.38 (d)	203,000	203,000
BNP Paribas SA
	5/11/09 to 10/22/09	1.05 to 1.20	233,000	233,000
Canadian Imperial Bank of Commerce
	5/4/09 to 6/12/09	0.80 to 1.23	47,000	47,000
Commerzbank AG
	7/1/09	1.01	27,000	27,000
Deutsche Bank AG
	6/30/09 to 7/6/09	0.50 to 1.40 (d)	251,000	251,000
DnB NOR Bank ASA
	8/13/09 to 8/14/09	1.00	30,000	30,000
Intesa Sanpaolo SpA
	5/1/09 to 7/13/09	0.98 to 1.20 (d)	89,000	89,000
Landesbank Hessen-Thuringen
	5/29/09	1.50	15,000	15,000
Lloyds TSB Bank PLC
	6/29/09	0.80	46,000	46,000
Natixis SA
	5/5/09 to 5/6/09	1.10 to 1.18 (d)	134,000	134,000
Rabobank Nederland
	6/15/09 to 1/12/10	0.95 to 1.40	325,000	325,000
Royal Bank of Canada
	7/1/09 to 1/12/10	1.00 to 1.51 (d)	96,000	96,000
Royal Bank of Scotland PLC
	5/4/09 to 7/14/09	1.10 to 1.25	171,000	171,000
Societe Generale
	8/12/09 to 10/27/09	1.00 to 1.03	133,000	133,000
Certificates of Deposit - continued
	Due Date	Yield (a)	Principal Amount (000s)	Value (000s)
New York Branch, Yankee Dollar, Foreign Banks - continued
Sumitomo Mitsui Banking Corp.
	5/7/09	1.18%	$ 15,000	$ 15,000
Svenska Handelsbanken AB
	5/26/09	1.60 (d)	14,000	14,000
Toronto-Dominion Bank
	5/14/09 to 1/14/10	1.00 to 2.50	324,000	324,000
				2,847,000
TOTAL CERTIFICATES OF DEPOSIT				3,952,001
Commercial Paper - 13.7%

Altria Group, Inc.
	5/1/09	1.75	24,000	24,000
Banco Bilbao Vizcaya Argentaria SA (London Branch)
	6/3/09 to 6/10/09	1.00	122,000	121,873
Caisse Nationale des Caisses d' Epargne et de Prevoyance
	7/22/09 to 7/27/09	0.85 to 0.89	21,000	20,957
Canadian Imperial Holdings, Inc.
	5/18/09	1.00	12,000	11,994
Commerzbank U.S. Finance, Inc.
	7/20/09	1.12	31,000	30,923
CVS Caremark Corp.
	6/10/09	6.10	24,000	24,000
Dakota Notes (Citibank Credit Card Issuance Trust)
	5/1/09 to 7/17/09	0.65 to 1.15	146,000	145,905
DnB NOR Bank ASA
	5/13/09 to 8/17/09	0.97 to 1.00	51,000	50,898
Emerald Notes (BA Credit Card Trust)
	5/1/09 to 7/6/09	1.05 to 1.71	109,000	108,914
Intesa Funding LLC
	5/19/09 to 7/6/09	1.10 to 1.80	48,000	47,920
ITT Corp.
	5/14/09 to 5/15/09	1.35	6,000	5,997
Natexis Banques Populaires US Finance Co. LLC
	7/28/09	1.20	52,000	51,847
Commercial Paper - continued
	Due Date	Yield (a)	Principal Amount (000s)	Value (000s)
Nationwide Building Society
	6/8/09 to 7/31/09	0.95 to 1.14%	$ 69,000	$ 68,865
Palisades Notes (Citibank Omni Master Trust)
	5/4/09 to 5/7/09	0.85	96,000	95,991
Santander Finance, Inc.
	7/22/09 to 8/3/09	1.51 to 1.66	60,000	59,756
Societe Generale North America, Inc.
	7/13/09	1.15	92,000	91,787
Toronto Dominion Holdings (USA)
	6/15/09 to 10/5/09	1.65 to 2.14	88,000	87,415
Transocean Ltd.
	5/21/09 to 5/26/09	0.90	10,000	9,994
UBS Finance, Inc.
	6/2/09	0.77	90,000	89,938
UniCredito Italiano Bank (Ireland) PLC
	6/9/09	0.92	14,000	13,986
Verizon Communications, Inc.
	5/5/09 to 5/12/09	1.25	14,000	13,997
Vodafone Group PLC
	8/10/09 to 8/26/09	1.08 to 1.20 (b)	42,000	41,853
TOTAL COMMERCIAL PAPER				1,218,810
U.S. Government and Government Agency Obligations - 2.5%

Other Government Related - 2.5%
Bank of America NA (FDIC Guaranteed)
	6/15/09 to 7/29/09	1.10 to 1.36 (c)(d)	125,728	125,728
Citibank NA (FDIC Guaranteed)
	6/30/09	1.28 (c)(d)	20,000	20,000
General Electric Capital Corp. (FDIC Guaranteed)
	7/8/09	1.21 (c)(d)	73,580	73,580
TOTAL U.S. GOVERNMENT AND GOVERNMENT AGENCY OBLIGATIONS				219,308
Federal Agencies - 15.2%
	Due Date	Yield (a)	Principal Amount (000s)	Value (000s)
Fannie Mae - 5.3%
	7/23/09 to 2/22/10	0.61 to 3.37%	$ 477,000	$ 473,851
Federal Home Loan Bank - 6.0%
	5/1/09 to 3/26/10	0.36 to 3.05 (d)	529,000	529,135
Freddie Mac - 3.9%
	5/21/09 to 11/3/09	0.43 to 1.26 (d)	349,000	348,528
TOTAL FEDERAL AGENCIES				1,351,514
U.S. Treasury Obligations - 3.3%

U.S. Treasury Bills - 3.3%
	7/2/09 to 3/11/10	0.71 to 1.36	293,916	292,748
Bank Notes - 0.8%

Bank of America NA
	7/30/09	1.24 (d)	71,000	70,887
Medium-Term Notes - 16.9%

AT&T, Inc.
	7/2/09	1.64 (b)(d)	72,000	72,000
Australia & New Zealand Banking Group Ltd.
	5/1/09	1.49 (b)(d)	155,000	155,000
Bank of America NA
	7/6/09	1.40 (d)	82,000	82,000
Bank of Montreal
	5/5/09	0.99 (b)(d)	42,000	42,000
Banque Federative du Credit Mutuel
	5/28/09	1.46 (b)(d)	35,000	35,000
BP Capital Markets PLC
	6/11/09	1.44 (d)	35,000	35,000
Comcast Corp.
	7/14/09	1.44 (d)	24,000	24,000
Commonwealth Bank of Australia
	7/3/09	1.40 (b)(d)	67,000	67,000
Credit Agricole SA
	6/22/09	1.48 (b)(d)	160,000	160,000
Medium-Term Notes - continued
	Due Date	Yield (a)	Principal Amount (000s)	Value (000s)
General Electric Capital Corp.
	5/7/09	0.54% (d)	$ 64,000	$ 64,000
Lloyds TSB Group PLC
	5/7/09	1.54 (b)(d)	76,000	76,000
National Australia Bank Ltd.
	6/8/09	1.51 (b)(d)	42,000	42,000
New York Life Insurance Co.
	5/15/09 to 6/30/09	1.43 to 2.37 (d)(e)	59,000	59,000
Nordea Bank AB
	7/24/09	1.45 (d)	155,000	155,000
Procter & Gamble Co.
	6/6/09	1.31 (d)	17,000	17,000
Royal Bank of Canada
	5/15/09	0.85 to 1.54 (b)(d)	80,000	80,000
Svenska Handelsbanken AB
	5/6/09	1.40 (b)(d)	60,000	60,000
Transamerica Occidental Life Insurance Co.
	7/1/09	1.46 (d)(e)	29,000	29,000
Verizon Communications, Inc.
	6/15/09	1.38 (d)	45,000	45,000
Wells Fargo & Co.
	5/1/09	3.55 (d)	80,000	80,000
	5/15/09	0.60 (b)(d)	52,500	52,500
Westpac Banking Corp.
	6/4/09	1.51 (b)(d)	70,000	69,997
TOTAL MEDIUM-TERM NOTES				1,501,497
Short-Term Notes - 0.3%

Metropolitan Life Insurance Co.
	7/1/09	2.71 (d)(e)	25,000	25,000

Repurchase Agreements - 2.2%
	Maturity Amount (000s)		Value (000s)
In a joint trading account at 0.18% dated 4/30/09 due 5/1/09 (Collateralized by U.S. Government Obligations) #	$ 234		$ 234
With:
Barclays Capital, Inc. at 0.58%, dated 4/14/09 due 5/14/09 (Collateralized by Equity Securities valued at $31,908,739)	29,014		29,000
BNP Paribas Securities Corp. at 0.6%, dated 4/30/09 due 5/1/09 (Collateralized by Equity Securities valued at $2,200,043)	2,000		2,000
Deutsche Bank Securities, Inc. at:
0.5%, dated 4/30/09 due 5/1/09 (Collateralized by Equity Securities valued at $38,500,580)	35,000		35,000
0.55%, dated:
4/21/09 due 5/26/09 (Collateralized by Equity Securities valued at $15,529,709)	14,007		14,000
4/30/09 due 6/1/09 (Collateralized by Equity Securities valued at $9,900,166)	9,004		9,000
0.8%, dated:
3/19/09 due 5/18/09 (Collateralized by Commercial Paper Obligations valued at $30,924,179, 5/27/09)	30,040		30,000
3/25/09 due 5/27/09 (Collateralized by Commercial Paper Obligations valued at $18,554,508, 5/27/09)	18,025		18,000
ING Financial Markets LLC at 0.7%, dated 4/13/09 due 5/11/09 (Collateralized by Corporate Obligations valued at $6,304,068, 5.25%, 9/1/35)	6,003		6,000
Merrill Lynch, Pierce, Fenner & Smith at 0.5%, dated 4/30/09 due 5/1/09 (Collateralized by Equity Securities valued at $60,500,886)	55,001		55,000
TOTAL REPURCHASE AGREEMENTS		198,234
TOTAL INVESTMENT PORTFOLIO - 100.6% (Cost $8,930,949)			8,930,949
NET OTHER ASSETS - (0.6)%			(55,400)
NET ASSETS - 100%		$ 8,875,549

Security Type Abbreviation

CP - COMMERCIAL PAPER

Legend

(a) Yield represents either the annualized yield at the date of purchase, or the stated coupon rate, or, for floating rate securities, the rate at period end.

(b) Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers. At the end of the period, the value of these securities amounted to $953,350,000 or 10.7% of net assets.

(c) Under the Temporary Liquidity Guarantee Program, the Federal Deposit Insurance Corporation guarantees principal and interest in the event of payment default or bankruptcy until the earlier of maturity date of the debt or until June 30, 2012. At the end of the period these securities amounted to $219,308,000 or 2.5% of net assets.

(d) Coupon rates for floating and adjustable rate securities reflect the rates in effect at period end. Due dates for these security types are the next interest rate reset date or, when applicable, the final maturity date.

(e) Restricted securities - Investment in securities not registered under the Securities Act of 1933 (excluding 144A issues). At the end of the period, the value of restricted securities (excluding 144A issues) amounted to $202,250,000 or 2.3% of net assets.

Additional information on each holding is as follows:

Security	Acquisition Date	Cost (Amounts in thousands)
Metropolitan Life Insurance Co. 2.71%, 7/1/09	3/26/02	$ 25,000
New York Life Insurance Co.: 1.43%, 5/15/09	5/12/08	$ 28,000
2.37%, 6/30/09	3/23/09	$ 31,000
Roche Holdings, Inc. 1.91%, 9/18/09	3/13/09	$ 89,250
Transamerica Occidental Life Insurance Co. 1.46%, 7/1/09	3/27/08	$ 29,000

# Additional Information on each counterparty to the repurchase agreement is as follows:

Repurchase Agreement / Counterparty	Value (Amounts in thousands)
$234,000 due 5/01/09 at 0.18%
BNP Paribas Securities Corp.	$ 15
Banc of America Securities LLC	12
Bank of America, NA	8
Barclays Capital, Inc.	37
Deutsche Bank Securities, Inc.	16
Goldman, Sachs & Co.	16
Greenwich Capital Markets, Inc.	5
ING Financial Markets LLC	23
J.P. Morgan Securities, Inc.	52
Merrill Lynch Government Securities, Inc.	5
RBC Capital Markets Corp.	3
Societe Generale, New York Branch	18
UBS Securities LLC	22
Wachovia Capital Markets LLC	2
	$ 234

Other Information

The following is a summary of the inputs used, as of April 30, 2009, involving the Fund's assets carried at value. The inputs or methodology used for valuing securities may not be an indication of the risk associated with investing in those securities. For more information on valuation inputs, and their aggregation into the levels used in the table below, please refer to the Security Valuation section in the accompanying Notes to Financial Statements.

Valuation Inputs at Reporting Date:
Description (Amounts in thousands)	Total	Level 1	Level 2	Level 3
Investments in Securities	$ 8,930,949	$ -	$ 8,930,949	$ -

See accompanying notes which are an integral part of the financial statements.

Annual Report

Financial Statements

Statement of Assets and Liabilities

Amounts in thousands (except per-share amount)	April 30, 2009

Assets
Investment in securities, at value (including repurchase agreements of $198,234) - See accompanying schedule: Unaffiliated issuers (cost $8,930,949)		$ 8,930,949
Cash		244
Receivable for fund shares sold		16,786
Interest receivable		14,307
Prepaid expenses		1,103
Other receivables		90
Total assets		8,963,479

Liabilities
Payable for investments purchased	$ 50,910
Payable for fund shares redeemed	33,253
Distributions payable	536
Accrued management fee	3,135
Other affiliated payables	8
Other payables and accrued expenses	88
Total liabilities		87,930

Net Assets		$ 8,875,549
Net Assets consist of:
Paid in capital		$ 8,874,595
Accumulated undistributed net realized gain (loss) on investments		954
Net Assets, for 8,874,164 shares outstanding		$ 8,875,549
Net Asset Value, offering price and redemption price per share ($8,875,549 ÷ 8,874,164 shares)		$ 1.00

See accompanying notes which are an integral part of the financial statements.

Annual Report

Financial Statements - continued

Statement of Operations

Amounts in thousands	Year ended April 30, 2009

Investment Income
Interest		$ 199,533

Expenses
Management fee	$ 33,859
Independent trustees' compensation	31
Money Market Guarantee Program fee	1,839
Total expenses before reductions	35,729
Expense reductions	(37)	35,692
Net investment income		163,841
Realized and Unrealized Gain (Loss) Net realized gain (loss) on:
Investment securities:
Unaffiliated issuers		803
Net increase in net assets resulting from operations		$ 164,644

See accompanying notes which are an integral part of the financial statements.

Annual Report

Statement of Changes in Net Assets

Amounts in thousands	Year ended April 30, 2009	Year ended April 30, 2008
Increase (Decrease) in Net Assets
Operations
Net investment income	$ 163,841	$ 345,678
Net realized gain (loss)	803	1,079
Net increase in net assets resulting from operations	164,644	346,757
Distributions to shareholders from net investment income	(163,844)	(345,676)
Share transactions at net asset value of $1.00 per share Proceeds from sales of shares	8,389,136	7,099,240
Reinvestment of distributions	152,067	322,274
Cost of shares redeemed	(7,456,044)	(6,892,418)
Net increase (decrease) in net assets and shares resulting from share transactions	1,085,159	529,096
Total increase (decrease) in net assets	1,085,959	530,177

Net Assets
Beginning of period	7,789,590	7,259,413
End of period	$ 8,875,549	$ 7,789,590

See accompanying notes which are an integral part of the financial statements.

Annual Report

Financial Highlights

Years ended April 30,	2009	2008	2007	2006	2005
Selected Per-Share Data
Net asset value, beginning of period	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00
Income from Investment Operations
Net investment income	.021	.045	.049	.036	.015
Distributions from net investment income	(.021)	(.045)	(.049)	(.036)	(.015)
Net asset value, end of period	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00
Total Return ^A,B	2.10%	4.60%	5.06%	3.64%	1.54%
Ratios to Average Net Assets^C
Expenses before reductions	.44%	.42%	.42%	.42%	.42%
Expenses net of fee waivers, if any	.44%	.42%	.42%	.42%	.42%
Expenses net of all reductions	.44%	.41%	.42%	.42%	.42%
Net investment income	2.03%	4.49%	4.95%	3.59%	1.52%
Supplemental Data
Net assets, end of period (in millions)	$ 8,876	$ 7,790	$ 7,259	$ 5,469	$ 5,565

^A Total returns would have been lower had certain expenses not been reduced during the periods shown.

^B Total returns do not include the effect of the account closeout fee.

^C Expense ratios reflect operating expenses of the Fund. Expenses before reductions do not reflect amounts reimbursed by the investment adviser or expense offset arrangements and do not represent the amount paid by the Fund during periods when reimbursements or reductions occur. Expenses net of fee waivers reflect expenses after reimbursement by the investment adviser but prior to reductions from expense offset arrangements. Expenses net of all reductions represent the net expenses paid by the Fund.

See accompanying notes which are an integral part of the financial statements.

Annual Report

Notes to Financial Statements

For the period ended April 30, 2009

(Amounts in thousands except ratios)

1. Organization.

Fidelity Money Market Fund (the Fund) is a fund of Fidelity Hereford Street Trust (the trust) and is authorized to issue an unlimited number of shares. The trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

2. Significant Accounting Policies.

The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America, which require management to make certain estimates and assumptions at the date of the financial statements. Actual results could differ from those estimates. The following summarizes the significant accounting policies of the Fund:

Security Valuation. As permitted by compliance with certain conditions under Rule 2a-7 of the 1940 Act, securities are valued at amortized cost, which approximates value.

The Fund adopted the provisions of Statement of Financial Accounting Standards No. 157, "Fair Value Measurements" (SFAS 157), effective with the beginning of the Fund's fiscal year. SFAS 157 establishes a hierarchy that prioritizes the inputs to valuation techniques giving the highest priority to readily available unadjusted quoted prices in active markets for identical assets (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements) when market prices are not readily available or reliable. The three levels of the hierarchy under SFAS 157 are described below:

Level 1	Quoted prices in active markets for identical securities.
Level 2	Prices determined using other significant observable inputs. Observable inputs are inputs that other market participants may use in pricing a security. These may include quoted prices for similar securities, interest rates, prepayment speeds, credit risk and others.
Level 3	Prices determined using significant unobservable inputs. In situations where quoted prices or observable inputs are unavailable or deemed less relevant (for example, when there is little or no market activity for an investment at the end of the period), unobservable inputs may be used. Unobservable inputs reflect the Fund's own assumptions about the factors market participants would use in pricing an investment, and would be based on the best information available.

The aggregate value by input level, as of April 30, 2009, for the Fund's investments is included at the end of the Fund's Schedule of Investments.

Investment Transactions and Income. The net asset value per share for processing shareholder transactions is calculated as of the close of business of the New York Stock Exchange (NYSE), normally 4:00 p.m. Eastern time. Security transactions are accounted for as of trade date. Gains and losses on securities sold are determined on the basis of identified cost. Interest income is accrued as earned. Interest income includes coupon interest and amortization of premium and accretion of discount on debt securities.

Annual Report

Notes to Financial Statements - continued

(Amounts in thousands except ratios)

2. Significant Accounting Policies - continued

Expenses. Most expenses of the trust can be directly attributed to a fund. Expenses which cannot be directly attributed are apportioned among each Fund in the trust. Expense estimates are accrued in the period to which they relate and adjustments are made when actual amounts are known.

The Board of Trustees of the Fund approved the participation by the Fund in the U.S. Treasury Department's Temporary Guarantee Program for Money Market Funds (the "Program") through September 18, 2009. Under the Program, if the Fund's market value per share drops below $0.995 on any day while the Program is in effect, shareholders of record on that date who also held shares in the Fund on September 19, 2008 may be eligible to receive a payment from the U.S. Treasury Department upon liquidation of the Fund. The Fund paid the U.S. Treasury Department fees equal to 0.04% based on the number of shares outstanding as of September 19, 2008 to participate in the Program. The fees are being amortized over the length of the participation in the Program. The expense is borne by the Fund without regard to any expense limitation currently in effect for the Fund.

Deferred Trustee Compensation. Under a Deferred Compensation Plan (the Plan), independent Trustees must defer receipt of a portion of, and may elect to defer receipt of an additional portion of, their annual compensation. Deferred amounts are invested in a cross-section of Fidelity funds, are marked-to-market and remain in the Fund until distributed in accordance with the Plan. The investment of deferred amounts and the offsetting payable to the Trustees are included in the accompanying Statement of Assets and Liabilities.

Income Tax Information and Distributions to Shareholders. Each year, the Fund intends to qualify as a regulated investment company by distributing substantially all of its taxable income and realized gains under Subchapter M of the Internal Revenue Code and filing its U.S. federal tax return. As a result, no provision for income taxes is required. The Fund is subject to the provisions of FASB Interpretation No. 48, Accounting for Uncertainties in Income Taxes (FIN 48). FIN 48 sets forth a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return. There are no unrecognized tax benefits in the accompanying financial statements. A Fund's federal tax return is subject to examination by the Internal Revenue Service (IRS) for a period of three years.

Annual Report

2. Significant Accounting Policies - continued

Income Tax Information and Distributions to Shareholders - continued

Dividends are declared daily and paid monthly from net investment income. Distributions from realized gains, if any, are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. In addition, the Fund will claim a portion of the payment made to redeeming shareholders as a distribution for income tax purposes.

Capital accounts within the financial statements are adjusted for permanent book-tax differences. These adjustments have no impact on net assets or the results of operations. Temporary book-tax differences will reverse in a subsequent period.

Book-tax differences are primarily due to deferred trustees compensation.

The tax-basis components of distributable earnings and the federal tax cost as of period end were as follows:

Unrealized appreciation	$ -
Unrealized depreciation	-
Net unrealized appreciation (depreciation)	-
Undistributed ordinary income	1,050

Cost for federal income tax purposes	$ 8,930,949

The tax character of distributions paid was as follows:

	April 30, 2009	April 30, 2008

Ordinary Income	$ 163,844	$ 345,676

3. Operating Policies.

Annual Report

Notes to Financial Statements - continued

(Amounts in thousands except ratios)

3. Operating Policies - continued

Repurchase Agreements - continued

basis, the value of the collateral to ensure it is at least equal to the principal amount of the repurchase agreement (including accrued interest). In the event of a default by the counterparty, realization of the collateral proceeds could be delayed, during which time the value of the collateral may decline.

Restricted Securities. The Fund may invest in securities that are subject to legal or contractual restrictions on resale. These securities generally may be resold in transactions exempt from registration or to the public if the securities are registered. Disposal of these securities may involve time-consuming negotiations and expense, and prompt sale at an acceptable price may be difficult. Information regarding restricted securities is included at the end of the Fund's Schedule of Investments.

4. Fees and Other Transactions with Affiliates.

Management Fee. FMR and its affiliates provide the Fund with investment management related services for which the Fund pays a monthly management fee that is based on an annual rate of .42% of the Fund's average net assets. FMR pays all other expenses, except the compensation of the independent Trustees and certain exceptions such as interest expense. The management fee paid to FMR by the Fund is reduced by an amount equal to the fees and expenses paid by the Fund to the independent Trustees.

FMR also bears the cost of providing shareholder services to the Fund. To offset the cost of providing these services, FMR or its affiliates collected certain transaction fees from shareholders which amounted to $89 for the period.

5. Expense Reductions.

Through arrangements with the Fund's custodian and transfer agent, credits realized as a result of uninvested cash balances were used to reduce the Fund's management fee. During the period, these credits reduced the Fund's management fee by $37.

6. Other.

The Fund's organizational documents provide former and current trustees and officers with a limited indemnification against liabilities arising in connection with the performance of their duties to the Fund. In the normal course of business, the Fund may also enter into contracts that provide general indemnifications. The Fund's maximum exposure under these arrangements is unknown as this would be dependent on future claims that may be made against the Fund. The risk of material loss from such claims is considered remote.

Annual Report

Report of Independent Registered Public Accounting Firm

To the Trustees of Fidelity Hereford Street Trust and the Shareholders of Fidelity Money Market Fund:

In our opinion, the accompanying statement of assets and liabilities, including the schedule of investments, and the related statements of operations and of changes in net assets and the financial highlights present fairly, in all material respects, the financial position of Fidelity Money Market Fund (a fund of Fidelity Hereford Street Trust) at April 30, 2009, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended and the financial highlights for each of the five years in the period then ended, in conformity with accounting principles generally accepted in the United States of America. These financial statements and financial highlights (hereafter referred to as "financial statements") are the responsibility of the Fidelity Money Market Fund's management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits, which included confirmation of securities at April 30, 2009 by correspondence with the custodian and brokers, provide a reasonable basis for our opinion.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Boston, Massachusetts

June 11, 2009

Annual Report

Trustees and Officers

The Trustees, Members of the Advisory Board, and executive officers of the trust and fund, as applicable, are listed below. The Board of Trustees governs the fund and is responsible for protecting the interests of shareholders. The Trustees are experienced executives who meet periodically throughout the year to oversee the fund's activities, review contractual arrangements with companies that provide services to the fund, and review the fund's performance. Except for Edward C. Johnson 3d and James C. Curvey, each of the Trustees oversees 161 funds advised by FMR or an affiliate. Mr. Johnson oversees 360 funds advised by FMR or an affiliate. Mr. Curvey oversees 383 funds advised by FMR or an affiliate.

The Trustees hold office without limit in time except that (a) any Trustee may resign; (b) any Trustee may be removed by written instrument, signed by at least two-thirds of the number of Trustees prior to such removal; (c) any Trustee who requests to be retired or who has become incapacitated by illness or injury may be retired by written instrument signed by a majority of the other Trustees; and (d) any Trustee may be removed at any special meeting of shareholders by a two-thirds vote of the outstanding voting securities of the trust. Each Trustee who is not an interested person (as defined in the 1940 Act) (Independent Trustee), shall retire not later than the last day of the calendar year in which his or her 72nd birthday occurs. The Independent Trustees may waive this mandatory retirement age policy with respect to individual Trustees. The executive officers and Advisory Board Members hold office without limit in time, except that any officer and Advisory Board Members may resign or may be removed by a vote of a majority of the Trustees at any regular meeting or any special meeting of the Trustees. Except as indicated, each individual has held the office shown or other offices in the same company for the past five years.

The fund's Statement of Additional Information (SAI) includes more information about the Trustees. To request a free copy, call Fidelity at 1-800-544-8544.

Annual Report

Trustees and Officers - continued

Interested Trustees*:

Correspondence intended for each Trustee who is an interested person may be sent to Fidelity Investments, 82 Devonshire Street, Boston, Massachusetts 02109.

Name, Age; Principal Occupation
Edward C. Johnson 3d (78)
	Year of Election or Appointment: 1993 Mr. Johnson is Trustee and Chairman of the Board of Trustees of certain Trusts. Mr. Johnson serves as Chief Executive Officer, Chairman, and a Director of FMR LLC; Chairman and a Director of FMR; Chairman and a Director of Fidelity Research & Analysis Company (FRAC); Chairman and a Director of Fidelity Investments Money Management, Inc.; and Chairman and a Director of FMR Co., Inc. In addition, Mr. Johnson serves as Chairman and Director of FIL Limited. Previously, Mr. Johnson served as President of FMR LLC (2006-2007). Mr. Edward C. Johnson 3d and Mr. Arthur E. Johnson are not related. Ms. Abigail P. Johnson is Mr. Edward C. Johnson 3d's daughter.
James C. Curvey (73)
	Year of Election or Appointment: 2007 Mr. Curvey also serves as Trustee (2007-present) of other investment companies advised by FMR. Mr. Curvey is a Director of FMR and FMR Co., Inc. (2007-present). Mr. Curvey is also Vice Chairman (2006- present) and Director of FMR LLC. In addition, Mr. Curvey serves as an Overseer for the Boston Symphony Orchestra and a member of the Trustees of Villanova University.

* Trustees have been determined to be "Interested Trustees" by virtue of, among other things, their affiliation with the trust or various entities under common control with FMR.

Annual Report

Independent Trustees:

Correspondence intended for each Independent Trustee (that is, the Trustees other than the Interested Trustees) may be sent to Fidelity Investments, P.O. Box 55235, Boston, Massachusetts 02205-5235.

Name, Age; Principal Occupation
Albert R. Gamper, Jr. (67)
	Year of Election or Appointment: 2006 Prior to his retirement in December 2004, Mr. Gamper served as Chairman of the Board of CIT Group Inc. (commercial finance). During his tenure with CIT Group Inc. Mr. Gamper served in numerous senior management positions, including Chairman (1987-1989; 1999-2001; 2002-2004), Chief Executive Officer (1987-2004), and President. Mr. Gamper currently serves as a member of the Board of Directors of Public Service Enterprise Group (utilities), a member of the Board of Governors, Rutgers University (2004-present), and Chairman of the Board of Saint Barnabas Health Care System. Previously, Mr. Gamper served as Chairman of the Board of Governors, Rutgers University (2004-2007).
Arthur E. Johnson (62)
	Year of Election or Appointment: 2008 Mr. Johnson serves as a member of the Board of Directors of Eaton Corporation (diversified power management, 2009-present) and AGL Resources, Inc. (holding company). Previously, Mr. Johnson served as Senior Vice President of Corporate Strategic Development of Lockheed Martin Corporation (defense contractor, 1999-2009), and on the Board of Directors of IKON Office Solutions, Inc. (1999-2008). Mr. Arthur E. Johnson and Mr. Edward C. Johnson 3d are not related. Mr. Arthur E. Johnson and Ms. Abigail P. Johnson are not related.
James H. Keyes (68)
	Year of Election or Appointment: 2007 Mr. Keyes serves as a member of the Boards of Navistar International Corporation (manufacture and sale of trucks, buses, and diesel engines) and Pitney Bowes, Inc. (integrated mail, messaging, and document management solutions). Previously, Mr. Keyes served as a member of the Board of LSI Logic Corporation (semiconductor technologies, 1984-2008).
Marie L. Knowles (62)
	Year of Election or Appointment: 2001 Prior to Ms. Knowles' retirement in June 2000, she served as Executive Vice President and Chief Financial Officer of Atlantic Richfield Company (ARCO) (diversified energy, 1996-2000). From 1993 to 1996, she was a Senior Vice President of ARCO and President of ARCO Transportation Company. She served as a Director of ARCO from 1996 to 1998. Ms. Knowles currently serves as a Director of McKesson Corporation (healthcare service). Ms. Knowles is a Trustee of the Brookings Institution and the Catalina Island Conservancy and also serves as a member of the Advisory Board for the School of Engineering of the University of Southern California and the Foundation Board of the School of Architecture at the University of Virginia (2007-present). Previously, Ms. Knowles served as a Director of Phelps Dodge Corporation (copper mining and manufacturing, 1994-2007).
Kenneth L. Wolfe (70)
	Year of Election or Appointment: 2005 Mr. Wolfe currently serves as a member of the Board of Revlon Inc. (2004-present). Previously, Mr. Wolfe served as Chairman and a Director (2007-2009) and Chairman and Chief Executive Officer of Hershey Foods Corporation, and as a member of the Boards of Adelphia Communications Corporation (telecommunications, 2003-2006) and Bausch & Lomb, Inc. (medical/pharmaceutical, 1993-2007).

Advisory Board Members and Executive Officers**:

Correspondence intended for Michael E. Kenneally may be sent to Fidelity Investments, P.O. Box 55235, Boston, Massachusetts 02205-5235. Correspondence intended for each executive officer and Abigail P. Johnson may be sent to Fidelity Investments, 82 Devonshire Street, Boston, Massachusetts 02109.

Name, Age; Principal Occupation
Michael E. Kenneally (55)
	Year of Election or Appointment: 2008 Mr. Kenneally also serves as Trustee (2009-present) or Member of the Advisory Board of other Fidelity Fixed Income and Asset Allocation Funds. Previously, Mr. Kenneally served as Chairman and Global Chief Executive Officer of Credit Suisse Asset Management (2003-2005). Mr. Kenneally was a Director of The Credit Suisse Funds (U.S. Mutual Fund, 2004-2008) and was awarded the Chartered Financial Analyst (CFA) designation in 1991.
Name, Age; Principal Occupation
Abigail P. Johnson (47)
	Year of Election or Appointment: 2009 Member of the Advisory Board. Ms. Johnson also serves as Trustee and Chairman of the Board of Trustees (2009-present) or Member of the Advisory Board of other Fidelity Fixed Income and Asset Allocation Funds. Ms. Johnson serves as President of Fidelity Employer Services Company (FESCO) (2005-present). Ms. Johnson is President and a Director of Fidelity Investments Money Management, Inc., FMR Co., Inc., and a Director of FMR LLC. Previously, Ms. Johnson served as President and a Director of FMR (2001-2005), a Trustee of other investment companies advised by FMR (2001-2005), Senior Vice President of the Fidelity funds (2001-2005), and managed a number of Fidelity funds. Ms. Abigail P. Johnson and Mr. Arthur E. Johnson are not related. Mr. Edward C. Johnson 3d is Ms. Johnson's father.
John R. Hebble (50)
	Year of Election or Appointment: 2008 President and Treasurer of Fidelity's Fixed Income and Asset Allocation Funds. Mr. Hebble is an employee of Fidelity Investments.
Boyce I. Greer (53)
	Year of Election or Appointment: 2005 or 2006 Vice President of Fidelity's Fixed Income Funds (2006) and Asset Allocation Funds (2005). Mr. Greer is also a Trustee of other investment companies advised by FMR. Mr. Greer is President and a Director of Strategic Advisers, Inc. (2008-present), President and a Director of Fidelity Investments Money Management, Inc. (2007-present), and an Executive Vice President of FMR and FMR Co., Inc. (2005-present). Previously, Mr. Greer served as a Director and Managing Director of Strategic Advisers, Inc. (2002-2005).
Charles S. Morrison (48)
	Year of Election or Appointment: 2005 Vice President of Fidelity's Money Market Funds. Mr. Morrison also serves as Senior Vice President, Money Market Group Leader of FMR, and as Executive Vice President of Fidelity Management & Research (U.K.) Inc. (2008-present). Previously, Mr. Morrison served as Vice President of Fidelity's Bond Funds and certain Balanced, and Asset Allocation Funds.
Scott C. Goebel (41)
	Year of Election or Appointment: 2008 Secretary and Chief Legal Officer (CLO) of the Fidelity funds. Mr. Goebel also serves as General Counsel, Secretary, and Senior Vice President of FMR (2008-present) and FMR Co., Inc. (2008-present); Deputy General Counsel of FMR LLC; Chief Legal Secretary of Fidelity Management & Research (Hong Kong) Limited (2008-present) and Assistant Secretary of Fidelity Management & Research (Japan) Inc. (2008- present), Fidelity Investments Money Management, Inc. (2008-present), Fidelity Management & Research (U.K.) Inc. (2008-present), and Fidelity Research and Analysis Company (2008-present). Previously, Mr. Goebel served as Assistant Secretary of the Funds (2007-2008) and as Vice President and Secretary of Fidelity Distributors Corporation (FDC) (2005-2007).
Holly C. Laurent (54)
	Year of Election or Appointment: 2008 Anti-Money Laundering (AML) Officer of the Fidelity funds. Ms. Laurent is an employee of Fidelity Investments. Previously, Ms. Laurent was Senior Vice President and Head of Legal for Fidelity Business Services India Pvt. Ltd. (2006-2008), and Senior Vice President, Deputy General Counsel and Group Head for FMR LLC (2005-2006).
Christine Reynolds (50)
	Year of Election or Appointment: 2008 Chief Financial Officer of the Fidelity funds. Ms. Reynolds became President of Fidelity Pricing and Cash Management Services (FPCMS) in August 2008. Ms. Reynolds served as Chief Operating Officer of FPCMS (2007-2008). Previously, Ms. Reynolds served as President, Treasurer, and Anti-Money Laundering officer of the Fidelity funds (2004-2007).
Michael H. Whitaker (41)
	Year of Election or Appointment: 2008 Chief Compliance Officer of Fidelity's Fixed Income and Asset Allocation Funds. Mr. Whitaker is an employee of Fidelity Investments (2007- present). Prior to joining Fidelity Investments, Mr. Whitaker worked at MFS Investment Management where he served as Senior Vice President and Chief Compliance Officer (2004-2006), and Assistant General Counsel.
Bryan A. Mehrmann (48)
	Year of Election or Appointment: 2005 Deputy Treasurer of the Fidelity funds. Mr. Mehrmann is an employee of Fidelity Investments. Previously, Mr. Mehrmann served as Vice President of Fidelity Investments Institutional Services Group (FIIS)/Fidelity Investments Institutional Operations Company, Inc. (FIIOC) Client Services (1998-2004).
Stephanie J. Dorsey (39)
	Year of Election or Appointment: 2008 Deputy Treasurer of Fidelity's Fixed Income and Asset Allocation Funds. Ms. Dorsey is an employee of Fidelity Investments (2008-present). Previously, Ms. Dorsey served as Treasurer (2004-2008) of the JPMorgan Mutual Funds and Vice President (2004-2008) of JPMorgan Chase Bank.
Robert G. Byrnes (42)
	Year of Election or Appointment: 2005 Assistant Treasurer of the Fidelity funds. Mr. Byrnes is an employee of Fidelity Investments (2005-present). Previously, Mr. Byrnes served as Vice President of Fidelity Pricing and Cash Management Services (FPCMS) (2003-2005).
Paul M. Murphy (62)
	Year of Election or Appointment: 2007 Assistant Treasurer of the Fidelity funds. Mr. Murphy is an employee of Fidelity Investments (2007-present). Previously, Mr. Murphy served as Chief Financial Officer of the Fidelity funds (2005-2006), Vice President and Associate General Counsel of FMR (2007), and Senior Vice President of Fidelity Pricing and Cash Management Services (FPCMS) (1994-2007).
Gary W. Ryan (50)
	Year of Election or Appointment: 2005 Assistant Treasurer of the Fidelity funds. Mr. Ryan is an employee of Fidelity Investments. Previously, Mr. Ryan served as Vice President of Fund Reporting in Fidelity Pricing and Cash Management Services (FPCMS) (1999-2005).

Annual Report

Distributions (Unaudited)

A total of 3.83% of the dividends distributed during the fiscal year was derived from interest on U.S. Government securities which is generally exempt from state income tax.

The fund designates $33,007,837 of distributions paid during the period January 1, 2009 to April 30, 2009 as qualifying to be taxed as interest-related dividends for nonresident alien shareholders.

The fund will notify shareholders in January 2010 of amounts for use in preparing 2009 income tax returns.

Annual Report

Investment Adviser

Fidelity Management & Research Company

Boston, MA

Investment Sub-Advisers

Fidelity Investments
Money Management, Inc.

Fidelity Research & Analysis Company

FIL Investment Advisors

FIL Investment Advisors
(U.K.) Ltd.

Fidelity Management & Research
(Hong Kong) Limited

Fidelity Management & Research
(Japan) Inc.

Fidelity Management & Research
(U.K.) Inc.

General Distributor

Fidelity Distributors Corporation

Boston, MA

Transfer and Service Agents

Fidelity Investments Institutional
Operations Company, Inc.

Boston, MA

Fidelity Service Company, Inc.

Boston, MA

Custodian

JPMorgan Chase Bank

New York, NY

The Fidelity Telephone Connection

Mutual Fund 24-Hour Service

Exchanges/Redemptions
and Account Assistance 1-800-544-6666

Product Information 1-800-544-6666

Retirement Accounts 1-800-544-4774
(8 a.m. - 9 p.m.)

TDD Service 1-800-544-0118
for the deaf and hearing impaired
(9 a.m. - 9 p.m. Eastern time)

Fidelity Automated Service
Telephone (FAST®) fid76719 1-800-544-5555

Automated line for quickest service

SPM-UANN-0609
1.784732.106

fid76722

Fidelity® Government Money
Market Fund

Annual Report

April 30, 2009
(2_fidelity_logos) (Registered_Trademark)

Chairman's Message	<Click Here>	Ned Johnson's message to shareholders.
Shareholder Expense Example	<Click Here>	An example of shareholder expenses.
Investment Changes/ Performance	<Click Here>	A summary of major shifts in the fund's investments over the past six months and one year.
Investments	<Click Here>	A complete list of the fund's investments.
Financial Statements	<Click Here>	Statements of assets and liabilities, operations, and changes in net assets, as well as financial highlights.
Notes	<Click Here>	Notes to the financial statements.
Report of Independent Registered Public Accounting Firm	<Click Here>
Trustees and Officers	<Click Here>
Distributions	<Click Here>

Standard & Poor's, S&P and S&P 500 are registered service marks of The McGraw-Hill Companies, Inc. and have been licensed for use by Fidelity Distributors Corporation.

Other third party marks appearing herein are the property of their respective owners.

All other marks appearing herein are registered or unregistered trademarks or service marks of FMR LLC or an affiliated company.

NOT FDIC INSURED · MAY LOSE VALUE · NO BANK GUARANTEE

Neither the fund nor Fidelity Distributors Corporation is a bank.

Annual Report

Chairman's Message

(photo_of_Edward_C_Johnson_3d)

Dear Shareholder:

You can further manage your investing risk through diversification. And today,

We invite you to contact us via the Internet, through our Investor Centers or by phone. It is our privilege to provide you the information you need to make the investments that are right for you.

Sincerely,
/s/Edward C. Johnson 3d

Edward C. Johnson 3d

Annual Report

Shareholder Expense Example

The Example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period (November 1, 2008 to April 30, 2009).

Actual Expenses

Hypothetical Example for Comparison Purposes

	Annualized Expense Ratio	Beginning Account Value November 1, 2008	Ending Account Value April 30, 2009	Expenses Paid During Period* November 1, 2008 to April 30, 2009
Actual	.46%	$ 1,000.00	$ 1,004.70	$ 2.29
Hypothetical (5% return per year before expenses)		$ 1,000.00	$ 1,022.51	$ 2.31

* Expenses are equal to the Fund's annualized expense ratio, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period).

Annual Report

Investment Changes/Performance (Unaudited)

Maturity Diversification
Days	% of fund's investments 4/30/09	% of fund's investments 10/31/08	% of fund's investments 4/30/08
0 - 30	55.5	57.5	73.7
31 - 90	26.8	21.1	16.2
91 - 180	6.0	12.9	2.6
181 - 397	11.7	8.5	7.5
Weighted Average Maturity
	4/30/09	10/31/08	4/30/08
Fidelity Government Money Market Fund	60 Days	55 Days	41 Days
Government Retail Money Market Funds Average*	53 Days	49 Days	48 Days

Asset Allocation (% of fund's net assets)
As of April 30, 2009		As of October 31, 2008
	Federal Agency Issues 65.8%		Federal Agency Issues 65.6%
	U.S. Treasury Obligations 6.5%		U.S. Treasury Obligations 1.0%
	Repurchase Agreements 27.9%		Repurchase Agreements 33.6%
	Net Other Assets** (0.2)%		Net Other Assets** (0.2)%

fid76741

**Net Other Assets are not included in the pie chart.

Current and Historical Seven-Day Yields

4/28/09

2/3/09

10/28/08

7/29/08

4/29/08

Fidelity Government Money Market Fund

0.41%

0.80%

1.92%

2.03%

2.01%

*Source: iMoneyNet, Inc.

Annual Report

Investments April 30, 2009

Showing Percentage of Net Assets

Federal Agencies - 65.8%
	Due Date	Yield (a)	Principal Amount	Value
Fannie Mae - 18.9%
	5/1/09 to 2/22/10	0.42 to 3.37% (b)	$ 217,600,000	$ 217,122,993
Federal Home Loan Bank - 26.4%
	5/1/09 to 3/26/10	0.34 to 3.04 (b)	302,020,000	301,965,506
Freddie Mac - 20.5%
	5/5/09 to 12/2/09	0.35 to 3.14 (b)	234,405,000	234,463,255
TOTAL FEDERAL AGENCIES				753,551,754
U.S. Treasury Obligations - 6.5%

U.S. Treasury Bills - 6.5%
	6/4/09 to 3/11/10	0.48 to 1.62	74,065,000	73,836,488

Repurchase Agreements - 27.9%
	Maturity Amount
In a joint trading account at 0.18% dated 4/30/09 due 5/1/09 (Collateralized by U.S. Government Obligations) #	$ 303,740,534		303,739,000
With Banc of America Securities LLC at 0.25%, dated 4/9/09 due 5/11/09 (Collateralized by U.S. Government Obligations valued at $16,322,494, 5%, 4/1/38)	16,003,556		16,000,000
TOTAL REPURCHASE AGREEMENTS		319,739,000
TOTAL INVESTMENT PORTFOLIO - 100.2% (Cost $1,147,127,242)			1,147,127,242
NET OTHER ASSETS - (0.2)%			(2,694,595)
NET ASSETS - 100%		$ 1,144,432,647

Legend

(a) Yield represents either the annualized yield at the date of purchase, or the stated coupon rate, or, for floating rate securities, the rate at period end.

(b) Coupon rates for floating and adjustable rate securities reflect the rates in effect at period end. Due dates for these security types are the next interest rate reset date or, when applicable, the final maturity date.

# Additional Information on each counterparty to the repurchase agreement is as follows:

Repurchase Agreement / Counterparty	Value
$303,739,000 due 5/01/09 at 0.18%
BNP Paribas Securities Corp.	$ 18,929,798
Banc of America Securities LLC	15,691,660
Bank of America, NA	10,450,127
Barclays Capital, Inc.	48,411,444
Deutsche Bank Securities, Inc.	20,281,926
Goldman, Sachs & Co.	20,281,926
Greenwich Capital Markets, Inc.	6,760,642
ING Financial Markets LLC	30,422,890
J.P. Morgan Securities, Inc.	67,606,423
Merrill Lynch Government Securities, Inc.	6,760,642
RBC Capital Markets Corp.	3,380,321
Societe Generale, New York Branch	23,662,247
UBS Securities LLC	29,070,761
Wachovia Capital Markets LLC	2,028,193
	$ 303,739,000

Other Information

Valuation Inputs at Reporting Date:
Description	Total	Level 1	Level 2	Level 3
Investments in Securities	$ 1,147,127,242	$ -	$ 1,147,127,242	$ -

See accompanying notes which are an integral part of the financial statements.

Annual Report

Financial Statements

Statement of Assets and Liabilities

	April 30, 2009

Assets
Investment in securities, at value (including repurchase agreements of $319,739,000) - See accompanying schedule: Unaffiliated issuers (cost $1,147,127,242)		$ 1,147,127,242
Cash		41,959
Receivable for fund shares sold		1,069,756
Interest receivable		1,442,902
Total assets		1,149,681,859

Liabilities
Payable for fund shares redeemed	$ 4,808,302
Distributions payable	29,313
Accrued management fee	410,722
Other affiliated payables	875
Total liabilities		5,249,212

Net Assets		$ 1,144,432,647
Net Assets consist of:
Paid in capital		$ 1,144,289,818
Accumulated undistributed net realized gain (loss) on investments		142,829
Net Assets, for 1,144,240,159 shares outstanding		$ 1,144,432,647
Net Asset Value, offering price and redemption price per share ($1,144,432,647 ÷ 1,144,240,159 shares)		$ 1.00

See accompanying notes which are an integral part of the financial statements.

Annual Report

Financial Statements - continued

Statement of Operations

	Year ended April 30, 2009

Investment Income
Interest		$ 19,155,526

Expenses
Management fee	$ 4,377,023
Independent trustees' compensation	4,072
Money Market Guarantee Program fee	266,087
Total expenses before reductions	4,647,182
Expense reductions	(3,499)	4,643,683
Net investment income		14,511,843
Realized and Unrealized Gain (Loss) Net realized gain (loss) on:
Investment securities:
Unaffiliated issuers		129,308
Net increase in net assets resulting from operations		$ 14,641,151

See accompanying notes which are an integral part of the financial statements.

Annual Report

Statement of Changes in Net Assets

	Year ended April 30, 2009	Year ended April 30, 2008
Increase (Decrease) in Net Assets
Operations
Net investment income	$ 14,511,843	$ 27,310,833
Net realized gain (loss)	129,308	87,559
Net increase in net assets resulting from operations	14,641,151	27,398,392
Distributions to shareholders from net investment income	(14,512,638)	(27,310,690)
Share transactions at net asset value of $1.00 per share Proceeds from sales of shares	1,679,905,814	1,573,583,955
Reinvestment of distributions	13,703,989	25,790,232
Cost of shares redeemed	(1,386,714,236)	(1,247,577,219)
Net increase (decrease) in net assets and shares resulting from share transactions	306,895,567	351,796,968
Total increase (decrease) in net assets	307,024,080	351,884,670

Net Assets
Beginning of period	837,408,567	485,523,897
End of period	$ 1,144,432,647	$ 837,408,567

See accompanying notes which are an integral part of the financial statements.

Annual Report

Financial Highlights

Years ended April 30,	2009	2008	2007	2006	2005
Selected Per-Share Data
Net asset value, beginning of period	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00
Income from Investment Operations
Net investment income	.015	.042	.049	.035	.015
Distributions from net investment income	(.015)	(.042)	(.049)	(.035)	(.015)
Net asset value, end of period	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00
Total Return^{A, B}	1.48%	4.31%	4.96%	3.56%	1.49%
Ratios to Average Net Assets^C
Expenses before reductions	.45%	.42%	.42%	.42%	.42%
Expenses net of fee waivers, if any	.45%	.42%	.42%	.42%	.42%
Expenses net of all reductions	.44%	.41%	.42%	.42%	.42%
Net investment income	1.39%	4.02%	4.86%	3.50%	1.45%
Supplemental Data
Net assets, end of period (000 omitted)	$ 1,144,433	$ 837,409	$ 485,524	$ 469,213	$ 502,255

^A Total returns would have been lower had certain expenses not been reduced during the periods shown.

^B Total returns do not include the effect of the account closeout fee.

See accompanying notes which are an integral part of the financial statements.

Annual Report

Notes to Financial Statements

For the period ended April 30, 2009

1. Organization.

Fidelity Government Money Market Fund (the Fund) is a fund of Fidelity Hereford Street Trust (the trust) and is authorized to issue an unlimited number of shares. The trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

2. Significant Accounting Policies.

Security Valuation. As permitted by compliance with certain conditions under Rule 2a-7 of the 1940 Act, securities are valued at amortized cost, which approximates value.

Level 1	Quoted prices in active markets for identical securities.
Level 2	Prices determined using other significant observable inputs. Observable inputs are inputs that other market participants may use in pricing a security. These may include quoted prices for similar securities, interest rates, prepayment speeds, credit risk and others.
Level 3	Prices determined using significant unobservable inputs. In situations where quoted prices or observable inputs are unavailable or deemed less relevant (for example, when there is little or no market activity for an investment at the end of the period), unobservable inputs may be used. Unobservable inputs reflect the Fund's own assumptions about the factors market participants would use in pricing an investment, and would be based on the best information available.

The aggregate value by input level, as of April 30, 2009, for the Fund's investments is included at the end of the Fund's Schedule of Investments.

Annual Report

Notes to Financial Statements - continued

2. Significant Accounting Policies - continued

The Board of Trustees of the Fund approved the participation by the Fund in the U.S. Treasury Department's Temporary Guarantee Program for Money Market Funds (the "Program") through April 30, 2009. The Fund paid the U.S. Treasury Department fees equal to 0.025% based on the number of shares outstanding as of September 19, 2008 to participate in the Program. The fees were amortized over the length of the participation in the Program. The expense was borne by the Fund without regard to any expense limitation currently in effect for the Fund.

Annual Report

2. Significant Accounting Policies - continued

Income Tax Information and Distributions to Shareholders - continued

Book-tax differences are primarily due to deferred trustees compensation.

The tax-basis components of distributable earnings and the federal tax cost as of period end were as follows:

Unrealized appreciation	$ -
Unrealized depreciation	-
Net unrealized appreciation (depreciation)	-
Undistributed ordinary income	143,705

Cost for federal income tax purposes	$ 1,147,127,242

The tax character of distributions paid was as follows:

	April 30, 2009	April 30, 2008
Ordinary Income	$ 14,512,638	$ 27,310,690

3. Operating Policies.

Repurchase Agreements. Fidelity Management & Research Company (FMR) has received an Exemptive Order from the Securities and Exchange Commission (the SEC) which permits the Fund and other affiliated entities of FMR to transfer uninvested cash balances into joint trading accounts which are then invested in repurchase agreements. The Fund may also invest directly with institutions in repurchase agreements. Repurchase agreements are collateralized by government or non-government securities. Upon settlement date, collateral is held in segregated accounts with custodian banks and may be obtained in the event of a default of the counterparty. The Fund monitors, on a daily basis, the value of the collateral to ensure it is at least equal to the principal amount of the repurchase agreement (including accrued interest). In the event of a default by the counterparty, realization of the collateral proceeds could be delayed, during which time the value of the collateral may decline.

Annual Report

Notes to Financial Statements - continued

4. Fees and Other Transactions with Affiliates.

5. Expense Reductions.

6. Other.

Annual Report

Report of Independent Registered Public Accounting Firm

To the Trustees of Fidelity Hereford Street Trust and the Shareholders of Fidelity Government Money Market Fund:

In our opinion, the accompanying statement of assets and liabilities, including the schedule of investments, and the related statements of operations and of changes in net assets and the financial highlights present fairly, in all material respects, the financial position of Fidelity Government Money Market Fund (a fund of Fidelity Hereford Street Trust) at April 30, 2009, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended and the financial highlights for each of the five years in the period then ended, in conformity with accounting principles generally accepted in the United States of America. These financial statements and financial highlights (hereafter referred to as "financial statements") are the responsibility of the Fidelity Government Money Market Fund's management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits, which included confirmation of securities at April 30, 2009 by correspondence with the custodian and brokers, provide a reasonable basis for our opinion.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Boston, Massachusetts

June 11, 2009

Annual Report

Trustees and Officers

The fund's Statement of Additional Information (SAI) includes more information about the Trustees. To request a free copy, call Fidelity at 1-800-544-8544.

Interested Trustees*:

Correspondence intended for each Trustee who is an interested person may be sent to Fidelity Investments, 82 Devonshire Street, Boston, Massachusetts 02109.

Name, Age; Principal Occupation
Edward C. Johnson 3d (78)
	Year of Election or Appointment: 1993 Mr. Johnson is Trustee and Chairman of the Board of Trustees of certain Trusts. Mr. Johnson serves as Chief Executive Officer, Chairman, and a Director of FMR LLC; Chairman and a Director of FMR; Chairman and a Director of Fidelity Research & Analysis Company (FRAC); Chairman and a Director of Fidelity Investments Money Management, Inc.; and Chairman and a Director of FMR Co., Inc. In addition, Mr. Johnson serves as Chairman and Director of FIL Limited. Previously, Mr. Johnson served as President of FMR LLC (2006-2007). Mr. Edward C. Johnson 3d and Mr. Arthur E. Johnson are not related. Ms. Abigail P. Johnson is Mr. Edward C. Johnson 3d's daughter.
James C. Curvey (73)
	Year of Election or Appointment: 2007 Mr. Curvey also serves as Trustee (2007-present) of other investment companies advised by FMR. Mr. Curvey is a Director of FMR and FMR Co., Inc. (2007-present). Mr. Curvey is also Vice Chairman (2006- present) and Director of FMR LLC. In addition, Mr. Curvey serves as an Overseer for the Boston Symphony Orchestra and a member of the Trustees of Villanova University.

* Trustees have been determined to be "Interested Trustees" by virtue of, among other things, their affiliation with the trust or various entities under common control with FMR.

Independent Trustees:

Correspondence intended for each Independent Trustee (that is, the Trustees other than the Interested Trustees) may be sent to Fidelity Investments, P.O. Box 55235, Boston, Massachusetts 02205-5235.

Name, Age; Principal Occupation
Albert R. Gamper, Jr. (67)
	Year of Election or Appointment: 2006 Prior to his retirement in December 2004, Mr. Gamper served as Chairman of the Board of CIT Group Inc. (commercial finance). During his tenure with CIT Group Inc. Mr. Gamper served in numerous senior management positions, including Chairman (1987-1989; 1999-2001; 2002-2004), Chief Executive Officer (1987-2004), and President. Mr. Gamper currently serves as a member of the Board of Directors of Public Service Enterprise Group (utilities), a member of the Board of Governors, Rutgers University (2004-present), and Chairman of the Board of Saint Barnabas Health Care System. Previously, Mr. Gamper served as Chairman of the Board of Governors, Rutgers University (2004-2007).
Arthur E. Johnson (62)
	Year of Election or Appointment: 2008 Mr. Johnson serves as a member of the Board of Directors of Eaton Corporation (diversified power management, 2009-present) and AGL Resources, Inc. (holding company). Previously, Mr. Johnson served as Senior Vice President of Corporate Strategic Development of Lockheed Martin Corporation (defense contractor, 1999-2009), and on the Board of Directors of IKON Office Solutions, Inc. (1999-2008). Mr. Arthur E. Johnson and Mr. Edward C. Johnson 3d are not related. Mr. Arthur E. Johnson and Ms. Abigail P. Johnson are not related.
James H. Keyes (68)
	Year of Election or Appointment: 2007 Mr. Keyes serves as a member of the Boards of Navistar International Corporation (manufacture and sale of trucks, buses, and diesel engines) and Pitney Bowes, Inc. (integrated mail, messaging, and document management solutions). Previously, Mr. Keyes served as a member of the Board of LSI Logic Corporation (semiconductor technologies, 1984-2008).
Marie L. Knowles (62)
	Year of Election or Appointment: 2001 Prior to Ms. Knowles' retirement in June 2000, she served as Executive Vice President and Chief Financial Officer of Atlantic Richfield Company (ARCO) (diversified energy, 1996-2000). From 1993 to 1996, she was a Senior Vice President of ARCO and President of ARCO Transportation Company. She served as a Director of ARCO from 1996 to 1998. Ms. Knowles currently serves as a Director of McKesson Corporation (healthcare service). Ms. Knowles is a Trustee of the Brookings Institution and the Catalina Island Conservancy and also serves as a member of the Advisory Board for the School of Engineering of the University of Southern California and the Foundation Board of the School of Architecture at the University of Virginia (2007-present). Previously, Ms. Knowles served as a Director of Phelps Dodge Corporation (copper mining and manufacturing, 1994-2007).
Kenneth L. Wolfe (70)
	Year of Election or Appointment: 2005 Mr. Wolfe currently serves as a member of the Board of Revlon Inc. (2004-present). Previously, Mr. Wolfe served as Chairman and a Director (2007-2009) and Chairman and Chief Executive Officer of Hershey Foods Corporation, and as a member of the Boards of Adelphia Communications Corporation (telecommunications, 2003-2006) and Bausch & Lomb, Inc. (medical/pharmaceutical, 1993-2007).

Annual Report

Trustees and Officers - continued

Advisory Board Members and Executive Officers**:

Name, Age; Principal Occupation
Michael E. Kenneally (55)
	Year of Election or Appointment: 2008 Mr. Kenneally also serves as Trustee (2009-present) or Member of the Advisory Board of other Fidelity Fixed Income and Asset Allocation Funds. Previously, Mr. Kenneally served as Chairman and Global Chief Executive Officer of Credit Suisse Asset Management (2003-2005). Mr. Kenneally was a Director of The Credit Suisse Funds (U.S. Mutual Fund, 2004-2008) and was awarded the Chartered Financial Analyst (CFA) designation in 1991.
Abigail P. Johnson (47)
<R>	Year of Election or Appointment: 2009</R> Member of the Advisory Board. Ms. Johnson also serves as Trustee and Chairman of the Board of Trustees (2009-present) or Member of the Advisory Board of other Fidelity Fixed Income and Asset Allocation Funds. Ms. Johnson serves as President of Fidelity Employer Services Company (FESCO) (2005-present). Ms. Johnson is President and a Director of Fidelity Investments Money Management, Inc., FMR Co., Inc., and a Director of FMR LLC. Previously, Ms. Johnson served as President and a Director of FMR (2001-2005), a Trustee of other investment companies advised by FMR (2001-2005), Senior Vice President of the Fidelity funds (2001-2005), and managed a number of Fidelity funds. Ms. Abigail P. Johnson and Mr. Arthur E. Johnson are not related. Mr. Edward C. Johnson 3d is Ms. Johnson's father.
John R. Hebble (50)
	Year of Election or Appointment: 2008 President and Treasurer of Fidelity's Fixed Income and Asset Allocation Funds. Mr. Hebble is an employee of Fidelity Investments.
Boyce I. Greer (53)
	Year of Election or Appointment: 2005 or 2006 Vice President of Fidelity's Fixed Income Funds (2006) and Asset Allocation Funds (2005). Mr. Greer is also a Trustee of other investment companies advised by FMR. Mr. Greer is President and a Director of Strategic Advisers, Inc. (2008-present), President and a Director of Fidelity Investments Money Management, Inc. (2007-present), and an Executive Vice President of FMR and FMR Co., Inc. (2005-present). Previously, Mr. Greer served as a Director and Managing Director of Strategic Advisers, Inc. (2002-2005).
Charles S. Morrison (48)
	Year of Election or Appointment: 2005 Vice President of Fidelity's Money Market Funds. Mr. Morrison also serves as Senior Vice President, Money Market Group Leader of FMR, and as Executive Vice President of Fidelity Management & Research (U.K.) Inc. (2008-present). Previously, Mr. Morrison served as Vice President of Fidelity's Bond Funds and certain Balanced, and Asset Allocation Funds.
Scott C. Goebel (41)
	Year of Election or Appointment: 2008 Secretary and Chief Legal Officer (CLO) of the Fidelity funds. Mr. Goebel also serves as General Counsel, Secretary, and Senior Vice President of FMR (2008-present) and FMR Co., Inc. (2008-present); Deputy General Counsel of FMR LLC; Chief Legal Secretary of Fidelity Management & Research (Hong Kong) Limited (2008-present) and Assistant Secretary of Fidelity Management & Research (Japan) Inc. (2008-present), Fidelity Investments Money Management, Inc. (2008-present), Fidelity Management & Research (U.K.) Inc. (2008-present), and Fidelity Research and Analysis Company (2008-present). Previously, Mr. Goebel served as Assistant Secretary of the Funds (2007-2008) and as Vice President and Secretary of Fidelity Distributors Corporation (FDC) (2005-2007).
Holly C. Laurent (54)
	Year of Election or Appointment: 2008 Anti-Money Laundering (AML) Officer of the Fidelity funds. Ms. Laurent is an employee of Fidelity Investments. Previously, Ms. Laurent was Senior Vice President and Head of Legal for Fidelity Business Services India Pvt. Ltd. (2006-2008), and Senior Vice President, Deputy General Counsel and Group Head for FMR LLC (2005-2006).
Christine Reynolds (50)
	Year of Election or Appointment: 2008 Chief Financial Officer of the Fidelity funds. Ms. Reynolds became President of Fidelity Pricing and Cash Management Services (FPCMS) in August 2008. Ms. Reynolds served as Chief Operating Officer of FPCMS (2007-2008). Previously, Ms. Reynolds served as President, Treasurer, and Anti-Money Laundering officer of the Fidelity funds (2004-2007).
Michael H. Whitaker (41)
	Year of Election or Appointment: 2008 Chief Compliance Officer of Fidelity's Fixed Income and Asset Allocation Funds. Mr. Whitaker is an employee of Fidelity Investments (2007-present). Prior to joining Fidelity Investments, Mr. Whitaker worked at MFS Investment Management where he served as Senior Vice President and Chief Compliance Officer (2004-2006), and Assistant General Counsel.
Bryan A. Mehrmann (48)
	Year of Election or Appointment: 2005 Deputy Treasurer of the Fidelity funds. Mr. Mehrmann is an employee of Fidelity Investments. Previously, Mr. Mehrmann served as Vice President of Fidelity Investments Institutional Services Group (FIIS)/Fidelity Investments Institutional Operations Company, Inc. (FIIOC) Client Services (1998-2004).
Stephanie J. Dorsey (39)
	Year of Election or Appointment: 2008 Deputy Treasurer of Fidelity's Fixed Income and Asset Allocation Funds. Ms. Dorsey is an employee of Fidelity Investments (2008-present). Previously, Ms. Dorsey served as Treasurer (2004-2008) of the JPMorgan Mutual Funds and Vice President (2004-2008) of JPMorgan Chase Bank.
Robert G. Byrnes (42)
	Year of Election or Appointment: 2005 Assistant Treasurer of the Fidelity funds. Mr. Byrnes is an employee of Fidelity Investments (2005-present). Previously, Mr. Byrnes served as Vice President of Fidelity Pricing and Cash Management Services (FPCMS) (2003-2005).
Paul M. Murphy (62)
	Year of Election or Appointment: 2007 Assistant Treasurer of the Fidelity funds. Mr. Murphy is an employee of Fidelity Investments (2007-present). Previously, Mr. Murphy served as Chief Financial Officer of the Fidelity funds (2005-2006), Vice President and Associate General Counsel of FMR (2007), and Senior Vice President of Fidelity Pricing and Cash Management Services (FPCMS) (1994-2007).
Gary W. Ryan (50)
	Year of Election or Appointment: 2005 Assistant Treasurer of the Fidelity funds. Mr. Ryan is an employee of Fidelity Investments. Previously, Mr. Ryan served as Vice President of Fund Reporting in Fidelity Pricing and Cash Management Services (FPCMS) (1999-2005).

Annual Report

Distributions (Unaudited)

A total of 44.34% of the dividends distributed during the fiscal year was derived from interest on U.S. Government securities which is generally exempt from state income tax.

The fund designates $3,155,046 of distributions paid during the period January 1, 2009 to April 30, 2009 as qualifying to be taxed as interest-related dividends for nonresident alien shareholders.

The fund will notify shareholders in January 2010 of amounts for use in preparing 2009 income tax returns.

Annual Report

Investment Adviser

Fidelity Management & Research Company
Boston, MA

Investment Sub-Advisers

Fidelity Investments
Money Management, Inc.

Fidelity Research & Analysis Company

FIL Investment Advisors

FIL Investment Advisors
(U.K.) Ltd.

Fidelity Management & Research
(U.K.) Inc.

Fidelity Management & Research
(Hong Kong) Limited

Fidelity Management & Research
(Japan) Inc.

General Distributor

Fidelity Distributors Corporation

Boston, MA

Transfer and Service Agents

Fidelity Investments Institutional
Operations Company, Inc.

Boston, MA

Fidelity Service Company, Inc.

Boston, MA

Custodian

JPMorgan Chase Bank

New York, NY

The Fidelity Telephone Connection

Mutual Fund 24-Hour Service

Exchanges/Redemptions
and Account Assistance 1-800-544-6666

Product Information 1-800-544-6666

Retirement Accounts 1-800-544-4774 (8 a.m. - 9 p.m.)

TDD Service 1-800-544-0118
for the deaf and hearing impaired
(9 a.m. - 9 p.m. Eastern time)

Fidelity Automated Service
Telephone (FAST®) fid76719 1-800-544-5555

Automated line for quickest service

SPU-UANN-0609
1.784733.106

fid76722

Fidelity®

U.S. Treasury
Money Market Fund

Annual Report

April 30, 2009
(2_fidelity_logos) (Registered_Trademark)

Chairman's Message	<Click Here>	Ned Johnson's message to shareholders.
Shareholder Expense Example	<Click Here>	An example of shareholder expenses.
Investment Changes/ Performance	<Click Here>	A summary of major shifts in the fund's investments over the past six months and one year, and performance information.
Investments	<Click Here>	A complete list of the fund's investments.
Financial Statements	<Click Here>	Statements of assets and liabilities, operations, and changes in net assets, as well as financial highlights.
Notes	<Click Here>	Notes to the financial statements.
Report of Independent Registered Public Accounting Firm	<Click Here>
Trustees and Officers	<Click Here>
Distributions	<Click Here>

Standard & Poor's, S&P and S&P 500 are registered service marks of The McGraw-Hill Companies, Inc. and have been licensed for use by Fidelity Distributors Corporation.

Other third party marks appearing herein are the property of their respective owners.

All other marks appearing herein are registered or unregistered trademarks or service marks of FMR LLC or an affiliated company.

NOT FDIC INSURED · MAY LOSE VALUE · NO BANK GUARANTEE

Neither the fund nor Fidelity Distributors Corporation is a bank.

Annual Report

Chairman's Message

(photo_of_Edward_C_Johnson_3d)

Dear Shareholder:

You can further manage your investing risk through diversification. And today,

We invite you to contact us via the Internet, through our Investor Centers or by phone. It is our privilege to provide you the information you need to make the investments that are right for you.

Sincerely,
/s/Edward C. Johnson 3d

Edward C. Johnson 3d

Annual Report

Shareholder Expense Example

The Example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period (November 1, 2008 to April 30, 2009).

Actual Expenses

Hypothetical Example for Comparison Purposes

Annual Report

	Annualized Expense Ratio	Beginning Account Value November 1, 2008	Ending Account Value April 30, 2009	Expenses Paid During Period* November 1, 2008 to April 30, 2009
Actual	.46%	$ 1,000.00	$ 1,001.30	$ 2.28
Hypothetical (5% return per year before expenses)		$ 1,000.00	$ 1,022.51	$ 2.31

* Expenses are equal to the Fund's annualized expense ratio, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period).

Annual Report

Investment Changes/Performance (Unaudited)

Maturity Diversification
Days	% of fund's investments 4/30/09	% of fund's investments 10/31/08	% of fund's investments 4/30/08
0 - 30	42.3	27.2	29.0
31 - 90	31.1	57.1	42.1
91 - 180	19.2	9.8	27.6
181 - 397	7.4	5.9	1.3
Weighted Average Maturity
	4/30/09	10/31/08	4/30/08
Fidelity U.S. Treasury Money Market Fund	68 Days	68 Days	63 Days
Treasury Retail Money Market Funds Average *	63 Days	58 Days	66 Days

Asset Allocation (% of fund's net assets)
As of April 30, 2009		As of October 31, 2008
	U.S. Treasury Bills 108.1%		U.S. Treasury Bills 93.5%
	U.S. Treasury Bonds and U.S. Treasury Notes 4.3%		U.S. Treasury Bonds and U.S. Treasury Notes 6.8%
	Net Other Assets** (12.4)%		Net Other Assets** (0.3)%

fid76762

**Net Other Assets are not included in the pie chart.

Current and Historical Seven-Day Yields

	4/28/09	2/3/09	10/28/08	7/29/08	4/29/08
Fidelity U.S. Treasury Money Market Fund	0.08%	0.08%	0.60%	1.42%	1.55%

*Source: iMoneyNet, Inc.

Annual Report

Investments April 30, 2009

Showing Percentage of Net Assets

U.S. Treasury Obligations - 112.4%
	Due Date	Yield (a)	Principal Amount (000s)	Value (000s)
U.S. Treasury Bills - 108.1%
	5/7/09 to 4/8/10	0.06 to 2.47%	$ 9,105,949	$ 9,097,748
U.S. Treasury Bonds - 0.3%
	5/15/09	0.26	21,000	21,105
U.S. Treasury Notes - 4.0%
	5/15/09 to 11/30/09	0.09 to 1.58	334,000	337,087

TOTAL INVESTMENT PORTFOLIO - 112.4% (Cost $9,455,940)		9,455,940
NET OTHER ASSETS - (12.4)%		(1,042,677)
NET ASSETS - 100%	$ 8,413,263

Legend

(a) Yield represents either the annualized yield at the date of purchase, or the stated coupon rate, or, for floating rate securities, the rate at period end.

Other Information

Valuation Inputs at Reporting Date:
Description (Amounts in thousands)	Total	Level 1	Level 2	Level 3
Investments in Securities	$ 9,455,940	$ -	$ 9,455,940	$ -

See accompanying notes which are an integral part of the financial statements.

Annual Report

Financial Statements

Statement of Assets and Liabilities

Amounts in thousands (except per-share amount)	April 30, 2009

Assets
Investment in securities, at value - See accompanying schedule: Unaffiliated issuers (cost $9,455,940)		$ 9,455,940
Receivable for fund shares sold		7,883
Interest receivable		3,381
Other receivables		32
Total assets		9,467,236

Liabilities
Payable for investments purchased	$ 1,019,712
Payable for fund shares redeemed	31,155
Distributions payable	53
Accrued management fee	3,051
Other affiliated payables	2
Total liabilities		1,053,973

Net Assets		$ 8,413,263
Net Assets consist of:
Paid in capital		$ 8,412,930
Accumulated undistributed net realized gain (loss) on investments		333
Net Assets, for 8,412,461 shares outstanding		$ 8,413,263
Net Asset Value, offering price and redemption price per share ($8,413,263 ÷ 8,412,461 shares)		$ 1.00

See accompanying notes which are an integral part of the financial statements.

Annual Report

Financial Statements - continued

Statement of Operations

Amounts in thousands	Year ended April 30, 2009

Investment Income
Interest		$ 81,416

Expenses
Management fee	$ 33,199
Independent trustees' compensation	29
Interest	240
Money Market Guarantee Program fee	2,098
Total expenses before reductions	35,566
Expense reductions	(84)	35,482
Net investment income		45,934
Realized and Unrealized Gain (Loss) Net realized gain (loss) on:
Investment securities:
Unaffiliated issuers		689
Net increase in net assets resulting from operations		$ 46,623

See accompanying notes which are an integral part of the financial statements.

Annual Report

Statement of Changes in Net Assets

Amounts in thousands	Year ended April 30, 2009	Year ended April 30, 2008
Increase (Decrease) in Net Assets
Operations
Net investment income	$ 45,934	$ 99,963
Net realized gain (loss)	689	232
Net increase in net assets resulting from operations	46,623	100,195
Distributions to shareholders from net investment income	(45,936)	(99,962)
Share transactions at net asset value of $1.00 per share Proceeds from sales of shares	15,779,208	7,152,852
Reinvestment of distributions	40,898	91,287
Cost of shares redeemed	(12,193,305)	(4,251,612)
Net increase (decrease) in net assets and shares resulting from share transactions	3,626,801	2,992,527
Total increase (decrease) in net assets	3,627,488	2,992,760

Net Assets
Beginning of period	4,785,775	1,793,015
End of period (including undistributed net investment income of $0 and distributions in excess of net investment income of $3, respectively)	$ 8,413,263	$ 4,785,775

See accompanying notes which are an integral part of the financial statements.

Annual Report

Financial Highlights

Years ended April 30,	2009	2008	2007	2006	2005
Selected Per-Share Data
Net asset value, beginning of period	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00
Income from Investment Operations
Net investment income	.007	.035	.046	.032	.014
Net realized and unrealized gain (loss)^D	-	-	-	-	-
Total from investment operations	.007	.035	.046	.032	.014
Distributions from net investment income	(.007)	(.035)	(.046)	(.032)	(.014)
Distributions from net realized gain	-	-	-	-	-^D
Total distributions	(.007)	(.035)	(.046)	(.032)	(.014)
Net asset value, end of period	$ 1.00	$ 1.00	$ 1.00	$ 1.00	$ 1.00
Total Return^{A, B}	.75%	3.59%	4.69%	3.29%	1.38%
Ratios to Average Net Assets^C
Expenses before reductions	.45%	.45%	.49%	.52%	.46%
Expenses net of fee waivers, if any	.45%	.45%	.49%	.52%	.46%
Expenses net of all reductions	.45%	.44%	.48%	.52%	.46%
Net investment income	.58%	3.21%	4.59%	3.22%	1.34%
Supplemental Data
Net assets, end of period (in millions)	$ 8,413	$ 4,786	$ 1,793	$ 1,763	$ 2,035

^A Total returns would have been lower had certain expenses not been reduced during the periods shown.

^B Total returns do not include the effect of the account closeout fee.

^D Amount represents less than $.001 per share.

See accompanying notes which are an integral part of the financial statements.

Annual Report

Notes to Financial Statements

For the period ended April 30, 2009

(Amounts in thousands except ratios)

1. Organization.

Fidelity U.S. Treasury Money Market Fund (the Fund) is a fund of Fidelity Hereford Street Trust (the trust) and is authorized to issue an unlimited number of shares. Effective the close of business on December 23, 2008, the Fund was closed to most new accounts. The trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

2. Significant Accounting Policies.

Security Valuation. As permitted by compliance with certain conditions under Rule 2a-7 of the 1940 Act, securities are valued at amortized cost, which approximates value.

Level 1	Quoted prices in active markets for identical securities.
Level 2	Prices determined using other significant observable inputs. Observable inputs are inputs that other market participants may use in pricing a security. These may include quoted prices for similar securities, interest rates, prepayment speeds, credit risk and others.
Level 3	Prices determined using significant unobservable inputs. In situations where quoted prices or observable inputs are unavailable or deemed less relevant (for example, when there is little or no market activity for an investment at the end of the period), unobservable inputs may be used. Unobservable inputs reflect the Fund's own assumptions about the factors market participants would use in pricing an investment, and would be based on the best information available.

The aggregate value by input level, as of April 30, 2009, for the Fund's investments is included at the end of the Fund's Schedule of Investments.

Annual Report

Notes to Financial Statements - continued

(Amounts in thousands except ratios)

2. Significant Accounting Policies - continued

The Board of Trustees of the Fund approved the participation by the Fund in the U.S. Treasury Department's Temporary Guarantee Program for Money Market Funds (the "Program") through April 30, 2009. The Fund paid the U.S. Treasury Department fees equal to 0.025% based on the number of shares outstanding as of September 19, 2008 to participate in the Program. The fees were amortized over the length of the participation in the Program. The expense was borne by the Fund without regard to any expense limitation currently in effect for the Fund.

Annual Report

2. Significant Accounting Policies - continued

Income Tax Information and Distributions to Shareholders - continued

Book-tax differences are primarily due to deferred trustees compensation and losses deferred due to wash sales.

The tax-basis components of distributable earnings and the federal tax cost as of period end were as follows:

Unrealized appreciation	$ -
Unrealized depreciation	-
Net unrealized appreciation (depreciation)	-
Undistributed ordinary income	377

Cost for federal income tax purposes	$ 9,455,940

The tax character of distributions paid was as follows:

	April 30, 2009	April 30, 2008
Ordinary Income	$ 45,936	$ 99,962

3. Operating Policies.

Annual Report

Notes to Financial Statements - continued

(Amounts in thousands except ratios)

3. Operating Policies - continued

Reverse Repurchase Agreements. To enhance its yield, the Fund may enter into reverse repurchase agreements whereby the Fund transfers securities to a counterparty who then agrees to transfer them back to the Fund at a future date and agreed upon price, reflecting a rate of interest below market rate. The Fund receives cash proceeds, which are invested in other securities, and agrees to repay the proceeds plus accrued interest in return for the same securities transferred. The Fund continues to receive interest payments on the transferred securities during the term of the reverse repurchase agreement. During the period that a reverse repurchase agreement is outstanding, the Fund identifies cash and liquid securities as segregated in its custodian records with a value at least equal to its obligation under the agreement. If the counterparty defaults on its obligation, because of insolvency or other reasons, the Fund could experience delays and costs in recovering the security or in gaining access to the collateral. The average daily balance during the period for which reverse repurchase agreements were outstanding amounted to $219,276. The weighted average interest rate was .79%. At period end, there were no reverse repurchase agreements outstanding.

4. Fees and Other Transactions with Affiliates.

5. Expense Reductions.

Annual Report

6. Other.

Annual Report

Report of Independent Registered Public Accounting Firm

To the Trustees of Fidelity Hereford Street Trust and the Shareholders of Fidelity U.S. Treasury Money Market Fund:

In our opinion, the accompanying statement of assets and liabilities, including the schedule of investments, and the related statements of operations and of changes in net assets and the financial highlights present fairly, in all material respects, the financial position of Fidelity U.S. Treasury Money Market Fund (a fund of Fidelity Hereford Street Trust) at April 30, 2009, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended and the financial highlights for each of the five years in the period then ended, in conformity with accounting principles generally accepted in the United States of America. These financial statements and financial highlights (hereafter referred to as "financial statements") are the responsibility of the Fidelity U.S. Treasury Money Market Fund's management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits, which included confirmation of securities at April 30, 2009 by correspondence with the custodian and brokers, provide a reasonable basis for our opinion.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Boston, Massachusetts

June 11, 2009

Annual Report

Trustees and Officers

The fund's Statement of Additional Information (SAI) includes more information about the Trustees. To request a free copy, call Fidelity at 1-800-544-8544.

Interested Trustees*:

Correspondence intended for each Trustee who is an interested person may be sent to Fidelity Investments, 82 Devonshire Street, Boston, Massachusetts 02109.

Name, Age; Principal Occupation
Edward C. Johnson 3d (78)
	Year of Election or Appointment: 1993 Mr. Johnson is Trustee and Chairman of the Board of Trustees of certain Trusts. Mr. Johnson serves as Chief Executive Officer, Chairman, and a Director of FMR LLC; Chairman and a Director of FMR; Chairman and a Director of Fidelity Research & Analysis Company (FRAC); Chairman and a Director of Fidelity Investments Money Management, Inc.; and Chairman and a Director of FMR Co., Inc. In addition, Mr. Johnson serves as Chairman and Director of FIL Limited. Previously, Mr. Johnson served as President of FMR LLC (2006-2007). Mr. Edward C. Johnson 3d and Mr. Arthur E. Johnson are not related. Ms. Abigail P. Johnson is Mr. Edward C. Johnson 3d's daughter.
James C. Curvey (73)
	Year of Election or Appointment: 2007 Mr. Curvey also serves as Trustee (2007-present) of other investment companies advised by FMR. Mr. Curvey is a Director of FMR and FMR Co., Inc. (2007-present). Mr. Curvey is also Vice Chairman (2006- present) and Director of FMR LLC. In addition, Mr. Curvey serves as an Overseer for the Boston Symphony Orchestra and a member of the Trustees of Villanova University.

* Trustees have been determined to be "Interested Trustees" by virtue of, among other things, their affiliation with the trust or various entities under common control with FMR.

Independent Trustees:

Correspondence intended for each Independent Trustee (that is, the Trustees other than the Interested Trustees) may be sent to Fidelity Investments, P.O. Box 55235, Boston, Massachusetts 02205-5235.

Name, Age; Principal Occupation
Albert R. Gamper, Jr. (67)
	Year of Election or Appointment: 2006 Prior to his retirement in December 2004, Mr. Gamper served as Chairman of the Board of CIT Group Inc. (commercial finance). During his tenure with CIT Group Inc. Mr. Gamper served in numerous senior management positions, including Chairman (1987-1989; 1999-2001; 2002-2004), Chief Executive Officer (1987-2004), and President. Mr. Gamper currently serves as a member of the Board of Directors of Public Service Enterprise Group (utilities), a member of the Board of Governors, Rutgers University (2004-present), and Chairman of the Board of Saint Barnabas Health Care System. Previously, Mr. Gamper served as Chairman of the Board of Governors, Rutgers University (2004-2007).
Arthur E. Johnson (62)
	Year of Election or Appointment: 2008 Mr. Johnson serves as a member of the Board of Directors of Eaton Corporation (diversified power management, 2009-present) and AGL Resources, Inc. (holding company). Previously, Mr. Johnson served as Senior Vice President of Corporate Strategic Development of Lockheed Martin Corporation (defense contractor, 1999-2009), and on the Board of Directors of IKON Office Solutions, Inc. (1999-2008). Mr. Arthur E. Johnson and Mr. Edward C. Johnson 3d are not related. Mr. Arthur E. Johnson and Ms. Abigail P. Johnson are not related.
James H. Keyes (68)
	Year of Election or Appointment: 2007 Mr. Keyes serves as a member of the Boards of Navistar International Corporation (manufacture and sale of trucks, buses, and diesel engines) and Pitney Bowes, Inc. (integrated mail, messaging, and document management solutions). Previously, Mr. Keyes served as a member of the Board of LSI Logic Corporation (semiconductor technologies, 1984-2008).
Marie L. Knowles (62)
	Year of Election or Appointment: 2001 Prior to Ms. Knowles' retirement in June 2000, she served as Executive Vice President and Chief Financial Officer of Atlantic Richfield Company (ARCO) (diversified energy, 1996-2000). From 1993 to 1996, she was a Senior Vice President of ARCO and President of ARCO Transportation Company. She served as a Director of ARCO from 1996 to 1998. Ms. Knowles currently serves as a Director of McKesson Corporation (healthcare service). Ms. Knowles is a Trustee of the Brookings Institution and the Catalina Island Conservancy and also serves as a member of the Advisory Board for the School of Engineering of the University of Southern California and the Foundation Board of the School of Architecture at the University of Virginia (2007-present). Previously, Ms. Knowles served as a Director of Phelps Dodge Corporation (copper mining and manufacturing, 1994-2007).
Kenneth L. Wolfe (70)
	Year of Election or Appointment: 2005 Mr. Wolfe currently serves as a member of the Board of Revlon Inc. (2004-present). Previously, Mr. Wolfe served as Chairman and a Director (2007-2009) and Chairman and Chief Executive Officer of Hershey Foods Corporation, and as a member of the Boards of Adelphia Communications Corporation (telecommunications, 2003-2006) and Bausch & Lomb, Inc. (medical/pharmaceutical, 1993-2007).

Annual Report

Advisory Board Members and Executive Officers**:

Name, Age; Principal Occupation
Michael E. Kenneally (55)
	Year of Election or Appointment: 2008 Mr. Kenneally also serves as Trustee (2009-present) or Member of the Advisory Board of other Fidelity Fixed Income and Asset Allocation Funds. Previously, Mr. Kenneally served as Chairman and Global Chief Executive Officer of Credit Suisse Asset Management (2003-2005). Mr. Kenneally was a Director of The Credit Suisse Funds (U.S. Mutual Fund, 2004-2008) and was awarded the Chartered Financial Analyst (CFA) designation in 1991.
Abigail P. Johnson (47)
	Year of Election or Appointment: 2009 Member of the Advisory Board. Ms. Johnson also serves as Trustee and Chairman of the Board of Trustees (2009-present) or Member of the Advisory Board of other Fidelity Fixed Income and Asset Allocation Funds. Ms. Johnson serves as President of Fidelity Employer Services Company (FESCO) (2005-present). Ms. Johnson is President and a Director of Fidelity Investments Money Management, Inc., FMR Co., Inc., and a Director of FMR LLC. Previously, Ms. Johnson served as President and a Director of FMR (2001-2005), a Trustee of other investment companies advised by FMR (2001-2005), Senior Vice President of the Fidelity funds (2001-2005), and managed a number of Fidelity funds. Ms. Abigail P. Johnson and Mr. Arthur E. Johnson are not related. Mr. Edward C. Johnson 3d is Ms. Johnson's father.
John R. Hebble (50)
	Year of Election or Appointment: 2008 President and Treasurer of Fidelity's Fixed Income and Asset Allocation Funds. Mr. Hebble is an employee of Fidelity Investments.
Boyce I. Greer (53)
	Year of Election or Appointment: 2005 or 2006 Vice President of Fidelity's Fixed Income Funds (2006) and Asset Allocation Funds (2005). Mr. Greer is also a Trustee of other investment companies advised by FMR. Mr. Greer is President and a Director of Strategic Advisers, Inc. (2008-present), President and a Director of Fidelity Investments Money Management, Inc. (2007-present), and an Executive Vice President of FMR and FMR Co., Inc. (2005-present). Previously, Mr. Greer served as a Director and Managing Director of Strategic Advisers, Inc. (2002-2005).
Charles S. Morrison (48)
	Year of Election or Appointment: 2005 Vice President of Fidelity's Money Market Funds. Mr. Morrison also serves as Senior Vice President, Money Market Group Leader of FMR, and as Executive Vice President of Fidelity Management & Research (U.K.) Inc. (2008-present). Previously, Mr. Morrison served as Vice President of Fidelity's Bond Funds and certain Balanced, and Asset Allocation Funds.
Scott C. Goebel (41)
	Year of Election or Appointment: 2008 Secretary and Chief Legal Officer (CLO) of the Fidelity funds. Mr. Goebel also serves as General Counsel, Secretary, and Senior Vice President of FMR (2008-present) and FMR Co., Inc. (2008-present); Deputy General Counsel of FMR LLC; Chief Legal Secretary of Fidelity Management & Research (Hong Kong) Limited (2008-present) and Assistant Secretary of Fidelity Management & Research (Japan) Inc. (2008-present), Fidelity Investments Money Management, Inc. (2008- present), Fidelity Management & Research (U.K.) Inc. (2008-present), and Fidelity Research and Analysis Company (2008-present). Previously, Mr. Goebel served as Assistant Secretary of the Funds (2007- 2008) and as Vice President and Secretary of Fidelity Distributors Corporation (FDC) (2005-2007).
Holly C. Laurent (54)
	Year of Election or Appointment: 2008 Anti-Money Laundering (AML) Officer of the Fidelity funds. Ms. Laurent is an employee of Fidelity Investments. Previously, Ms. Laurent was Senior Vice President and Head of Legal for Fidelity Business Services India Pvt. Ltd. (2006-2008), and Senior Vice President, Deputy General Counsel and Group Head for FMR LLC (2005-2006).
Christine Reynolds (50)
	Year of Election or Appointment: 2008 Chief Financial Officer of the Fidelity funds. Ms. Reynolds became President of Fidelity Pricing and Cash Management Services (FPCMS) in August 2008. Ms. Reynolds served as Chief Operating Officer of FPCMS (2007-2008). Previously, Ms. Reynolds served as President, Treasurer, and Anti-Money Laundering officer of the Fidelity funds (2004-2007).
Michael H. Whitaker (41)
	Year of Election or Appointment: 2008 Chief Compliance Officer of Fidelity's Fixed Income and Asset Allocation Funds. Mr. Whitaker is an employee of Fidelity Investments (2007- present). Prior to joining Fidelity Investments, Mr. Whitaker worked at MFS Investment Management where he served as Senior Vice President and Chief Compliance Officer (2004-2006), and Assistant General Counsel.
Bryan A. Mehrmann (48)
	Year of Election or Appointment: 2005 Deputy Treasurer of the Fidelity funds. Mr. Mehrmann is an employee of Fidelity Investments. Previously, Mr. Mehrmann served as Vice President of Fidelity Investments Institutional Services Group (FIIS)/Fidelity Investments Institutional Operations Company, Inc. (FIIOC) Client Services (1998-2004).
Stephanie J. Dorsey (39)
	Year of Election or Appointment: 2008 Deputy Treasurer of Fidelity's Fixed Income and Asset Allocation Funds. Ms. Dorsey is an employee of Fidelity Investments (2008-present). Previously, Ms. Dorsey served as Treasurer (2004-2008) of the JPMorgan Mutual Funds and Vice President (2004-2008) of JPMorgan Chase Bank.
Robert G. Byrnes (42)
	Year of Election or Appointment: 2005 Assistant Treasurer of the Fidelity funds. Mr. Byrnes is an employee of Fidelity Investments (2005-present). Previously, Mr. Byrnes served as Vice President of Fidelity Pricing and Cash Management Services (FPCMS) (2003-2005).
Paul M. Murphy (62)
	Year of Election or Appointment: 2007 Assistant Treasurer of the Fidelity funds. Mr. Murphy is an employee of Fidelity Investments (2007-present). Previously, Mr. Murphy served as Chief Financial Officer of the Fidelity funds (2005-2006), Vice President and Associate General Counsel of FMR (2007), and Senior Vice President of Fidelity Pricing and Cash Management Services (FPCMS) (1994-2007).
Gary W. Ryan (50)
	Year of Election or Appointment: 2005 Assistant Treasurer of the Fidelity funds. Mr. Ryan is an employee of Fidelity Investments. Previously, Mr. Ryan served as Vice President of Fund Reporting in Fidelity Pricing and Cash Management Services (FPCMS) (1999-2005).

Annual Report

Distributions (Unaudited)

A total of 100% of the dividends distributed during the fiscal year was derived from interest on U.S. Government securities which is generally exempt from state income tax.

The fund designates $5,410,515 of distributions paid during the period May 1, 2008 to April 30, 2009 as qualifying to be taxed as interest-related dividends for nonresident alien shareholders.

The fund will notify shareholders in January 2010 of amounts for use in preparing 2009 income tax returns.

Annual Report

Managing Your Investments

Fidelity offers several ways to conveniently manage your personal investments via your telephone or PC. You can access your account information, conduct trades and research your investments 24 hours a day.

By Phone

Fidelity Automated Service Telephone provides a single toll-free number to access account balances, positions, quotes and trading. It's easy to navigate the service, and on your first call, the system will help you create a personal identification number (PIN) for security.

(phone_graphic)
Fidelity Automated
Service Telephone (FAST®)
1-800-544-5555

Press

fid76764 For mutual fund and brokerage trading.

fid76766 For quotes.*

fid76768 For account balances and holdings.

fid76770 To review orders and mutual
fund activity.

fid76772 To change your PIN.

fid76774 fid76776 To speak to a Fidelity representative.

By PC

Fidelity's web site on the Internet provides a wide range of information, including daily financial news, fund performance, interactive planning tools and news about Fidelity products and services.

(computer_graphic)
Fidelity's Web Site
www.fidelity.com

* When you call the quotes line, please remember that a fund's yield and return will vary and, except for money market funds, share price will also vary. This means that you may have a gain or loss when you sell your shares. There is no assurance that money market funds will be able to maintain a stable $1 share price; an investment in a money market fund is not insured or guaranteed by the U.S. government. Total returns are historical and include changes in share price, reinvestment of dividends and capital gains, and the effects of any sales charges.

Annual Report

To Write Fidelity

We'll give your correspondence immediate attention and send you written confirmation upon completion of your request.

(letter_graphic)
Making Changes
To Your Account

(such as changing name, address, bank, etc.)

Fidelity Investments
P.O. Box 770001
Cincinnati, OH 45277-0002

(letter_graphic)
For Non-Retirement
Accounts

Buying shares

Fidelity Investments
P.O. Box 770001
Cincinnati, OH 45277-0003

Overnight Express
Fidelity Investments
Attn: Distribution Services
100 Crosby Parkway - KC1H
Covington, KY 41015

Selling shares

Fidelity Investments
P.O. Box 770001
Cincinnati, OH 45277-0035

Overnight Express
Fidelity Investments
Attn: Distribution Services
100 Crosby Parkway - KC1H
Covington, KY 41015

General Correspondence

Fidelity Investments
P.O. Box 500
Merrimack, NH 03054-0500

(letter_graphic)
For Retirement
Accounts

Buying shares

Fidelity Investments
P.O. Box 770001
Cincinnati, OH 45277-0003

Selling shares

Fidelity Investments
P.O. Box 770001
Cincinnati, OH 45277-0035

Overnight Express
Fidelity Investments
Attn: Distribution Services
100 Crosby Parkway - KC1H
Covington, KY 41015

General Correspondence

Fidelity Investments
P.O. Box 500
Merrimack, NH 03054-0500

Annual Report

To Visit Fidelity

For directions and hours,
please call 1-800-544-9797.

Arizona

7001 West Ray Road
Chandler, AZ

15445 N. Scottsdale Road
Scottsdale, AZ

California

815 East Birch Street
Brea, CA

1411 Chapin Avenue
Burlingame, CA

851 East Hamilton Avenue
Campbell, CA

19200 Von Karman Avenue
Irvine, CA

601 Larkspur Landing Circle
Larkspur, CA

2000 Avenue of the Stars
Los Angeles, CA

27101 Puerta Real
Mission Viejo, CA

73-575 El Paseo
Palm Desert, CA

251 University Avenue
Palo Alto, CA

123 South Lake Avenue
Pasadena, CA

16656 Bernardo Ctr. Drive
Rancho Bernardo, CA

1220 Roseville Parkway
Roseville, CA

1740 Arden Way
Sacramento, CA

7676 Hazard Center Drive
San Diego, CA

11943 El Camino Real
San Diego, CA

8 Montgomery Street
San Francisco, CA

3793 State Street
Santa Barbara, CA

1200 Wilshire Boulevard
Santa Monica, CA

398 West El Camino Real
Sunnyvale, CA

111 South Westlake Blvd
Thousand Oaks, CA

21701 Hawthorne Boulevard
Torrance, CA

2001 North Main Street
Walnut Creek, CA

6326 Canoga Avenue
Woodland Hills, CA

Colorado

281 East Flatiron Circle
Broomfield, CO

1625 Broadway
Denver, CO

9185 Westview Road
Lone Tree, CO

Connecticut

48 West Putnam Avenue
Greenwich, CT

265 Church Street
New Haven, CT

300 Atlantic Street
Stamford, CT

29 South Main Street
West Hartford, CT

Delaware

400 Delaware Avenue
Wilmington, DE

Florida

175 East Altamonte Drive
Altamonte Springs, FL

4400 N. Federal Highway
Boca Raton, FL

121 Alhambra Plaza
Coral Gables, FL

2948 N. Federal Highway
Ft. Lauderdale, FL

4671 Town Center Parkway
Jacksonville, FL

8880 Tamiami Trail, North
Naples, FL

230 Royal Palm Way
Palm Beach, FL

3501 PGA Boulevard
Palm Beach Gardens, FL

3550 Tamiami Trail, South
Sarasota, FL

1502 N. Westshore Blvd.
Tampa, FL

2465 State Road 7
Wellington, FL

Georgia

3445 Peachtree Road, N.E.
Atlanta, GA

1000 Abernathy Road
Atlanta, GA

Illinois

One North LaSalle Street
Chicago, IL

401 North Michigan Avenue
Chicago, IL

One Skokie Valley Road
Highland Park, IL

1415 West 22nd Street
Oak Brook, IL

15105 S LaGrange Road
Orland Park, IL

1572 East Golf Road
Schaumburg, IL

Indiana

4729 East 82nd Street
Indianapolis, IN

8480 Keystone Crossing
Indianapolis, IN

Kansas

5400 College Boulevard
Overland Park, KS

Maine

Three Canal Plaza
Portland, ME

Maryland

7315 Wisconsin Avenue
Bethesda, MD

610 York Road
Towson, MD

Massachusetts

801 Boylston Street
Boston, MA

155 Congress Street
Boston, MA

300 Granite Street
Braintree, MA

44 Mall Road
Burlington, MA

238 Main Street
Cambridge, MA

200 Endicott Street
Danvers, MA

Annual Report

405 Cochituate Road
Framingham, MA

551 Boston Turnpike
Shrewsbury, MA

Michigan

500 E. Eisenhower Pkwy.
Ann Arbor, MI

280 Old N. Woodward Ave.
Birmingham, MI

30200 Northwestern Hwy.
Farmington Hills, MI

43420 Grand River Avenue
Novi, MI

Minnesota

7740 France Avenue South
Edina, MN

8342 3rd Street North
Oakdale, MN

Missouri

1524 South Lindbergh Blvd.
St. Louis, MO

Nevada

2225 Village Walk Drive
Henderson, NV

New Jersey

501 Route 73 South
Marlton, NJ

150 Essex Street
Millburn, NJ

35 Morris Street
Morristown, NJ

396 Route 17, North
Paramus, NJ

3518 Route 1 North
Princeton, NJ

530 Broad Street
Shrewsbury, NJ

New Mexico

2261 Q Street NE
Albuquerque, NM

New York

1130 Franklin Avenue
Garden City, NY

37 West Jericho Turnpike
Huntington Station, NY

1271 Avenue of the Americas
New York, NY

980 Madison Avenue
New York, NY

61 Broadway
New York, NY

350 Park Avenue
New York, NY

200 Fifth Avenue
New York, NY

733 Third Avenue
New York, NY

11 Penn Plaza
New York, NY

2070 Broadway
New York, NY

1075 Northern Blvd.
Roslyn, NY

799 Central Park Avenue
Scarsdale, NY

North Carolina

4611 Sharon Road
Charlotte, NC

7011 Fayetteville Road
Durham, NC

Ohio

3805 Edwards Road
Cincinnati, OH

1324 Polaris Parkway
Columbus, OH

1800 Crocker Road
Westlake, OH

28699 Chagrin Boulevard
Woodmere Village, OH

Oregon

7493 SW Bridgeport Road
Tigard, OR

Pennsylvania

600 West DeKalb Pike
King of Prussia, PA

1735 Market Street
Philadelphia, PA

12001 Perry Highway
Wexford, PA

Rhode Island

10 Memorial Boulevard
Providence, RI

Tennessee

3018 Peoples Street
Johnson City, TN

7628 West Farmington Blvd.
Germantown, TN

2035 Mallory Lane
Franklin, TN

Texas

10000 Research Boulevard
Austin, TX

4001 Northwest Parkway
Dallas, TX

12532 Memorial Drive
Houston, TX

2701 Drexel Drive
Houston, TX

6560 Fannin Street
Houston, TX

1701 Lake Robbins Drive
The Woodlands, TX

6500 N. MacArthur Blvd.
Irving, TX

6005 West Park Boulevard
Plano, TX

14100 San Pedro
San Antonio, TX

1576 East Southlake Blvd.
Southlake, TX

Utah

279 West South Temple
Salt Lake City, UT

Virginia

1861 International Drive
McLean, VA

Washington

10500 NE 8th Street
Bellevue, WA

1518 6th Avenue
Seattle, WA

Washington, DC

1900 K Street, N.W.
Washington, DC

Wisconsin

16020 West Bluemound Road
Brookfield, WI

Fidelity Brokerage Services, Inc., 100 Summer St., Boston, MA 02110 Member NYSE/SIPC

Annual Report

Investment Adviser

Fidelity Management & Research
Company
Boston, MA

Investment Sub-Advisers

Fidelity Investments
Money Management, Inc.

Fidelity Research & Analysis Company

FIL Investment Advisors

FIL Investment Advisors
(U.K.) Ltd.

Fidelity Management & Research
(U.K.) Inc.

Fidelity Management & Research
(Hong Kong) Limited

Fidelity Management & Research
(Japan) Inc.

General Distributor

Fidelity Distributors Corporation

Boston, MA

Transfer and Service Agents

Fidelity Investments Institutional
Operations Company, Inc.

Boston, MA

Fidelity Service Company, Inc.

Boston, MA

Custodian

JPMorgan Chase Bank

New York, NY

The Fidelity Telephone Connection

Mutual Fund 24-Hour Service

Exchanges/Redemptions
and Account Assistance 1-800-544-6666

Product Information 1-800-544-6666

Retirement Accounts 1-800-544-4774 (8 a.m. - 9 p.m.)

TDD Service 1-800-544-0118
for the deaf and hearing impaired
(9 a.m. - 9 p.m. Eastern time)

Fidelity Automated Service
Telephone (FAST®) fid76719 1-800-544-5555

Automated line for quickest service

TMM-UANN-0609
1.784734.106

fid76722

Item 2. Code of Ethics

As of the end of the period, April 30, 2009, Fidelity Hereford Street Trust (the trust) has adopted a code of ethics, as defined in Item 2 of Form N-CSR, that applies to its President and Treasurer and its Chief Financial Officer. A copy of the code of ethics is filed as an exhibit to this Form N-CSR.

Item 3. Audit Committee Financial Expert

The Board of Trustees of the trust has determined that Marie L. Knowles is an audit committee financial expert, as defined in Item 3 of Form N-CSR. Ms. Knowles is independent for purposes of Item 3 of Form N-CSR.

Item 4. Principal Accountant Fees and Services

Fees and Services

The following table presents fees billed by PricewaterhouseCoopers LLP ("PwC") in each of the last two fiscal years for services rendered to Fidelity Government Money Market Fund, Fidelity Money Market Fund and Fidelity U.S. Treasury Money Market Fund (the "Funds"):

Services Billed by PwC

April 30, 2009 Fees^A

	Audit Fees	Audit-Related Fees	Tax Fees	All Other Fees
Fidelity Government Money Market Fund	$43,000	$-	$2,000	$2,000
Fidelity Money Market Fund	$61,000	$-	$2,000	$7,000
Fidelity U.S. Treasury Money Market Fund	$59,000	$-	$2,000	$6,200

April 30, 2008 Fees^A

	Audit Fees	Audit-Related Fees	Tax Fees	All Other Fees
Fidelity Government Money Market Fund	$41,000	$-	$2,000	$1,300
Fidelity Money Market Fund	$54,000	$-	$2,000	$5,000
Fidelity U.S. Treasury Money Market Fund	$45,000	$-	$2,000	$2,600

^AAmounts may reflect rounding.

The following table presents fees billed by PwC that were required to be approved by the Audit Committee for services that relate directly to the operations and financial reporting of the Funds and that are rendered on behalf of Fidelity Management & Research Company ("FMR") and entities controlling, controlled by, or under common control with FMR (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser) that provide ongoing services to the Funds ("Fund Service Providers"):

Services Billed by PwC

	April 30, 2009^A	April 30, 2008^A
Audit-Related Fees	$3,305,000	$510,000^B
Tax Fees	$2,000	$-
All Other Fees	$2,000	$-^B

^A Amounts may reflect rounding.

^B Reflects current period presentation.

"Audit-Related Fees" represent fees billed for assurance and related services that are reasonably related to the performance of the fund audit or the review of the fund's financial statements and that are not reported under Audit Fees.

"Tax Fees" represent fees billed for tax compliance, tax advice or tax planning that relate directly to the operations and financial reporting of the fund.

"All Other Fees" represent fees billed for assurance services provided to the fund or Fund Service Provider that relate directly to the operations and financial reporting of the fund, excluding those services that are reported under Audit Fees, Audit-Related Fees or Tax Fees.

Assurance services must be performed by an independent public accountant.

* * *

The aggregate non-audit fees billed by PwC for services rendered to the Funds, FMR (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any Fund Service Provider for each of the last two fiscal years of the Funds are as follows:

Billed By	April 30, 2009^A	April 30, 2008^A
PwC	$3,995,000	$1,685,000

^A Amounts may reflect rounding.

The trust's Audit Committee has considered non-audit services that were not pre-approved that were provided by PwC to Fund Service Providers to be compatible with maintaining the independence of PwC in its audit of the Funds, taking into account representations from PwC, in accordance with Public Company Accounting Oversight Board rules, regarding its independence from the Funds and their related entities and FMR's review of the appropriateness and permissibility under applicable law of such non-audit services prior to their provision to the Fund Service Providers.

Audit Committee Pre-Approval Policies and Procedures

The trust's Audit Committee must pre-approve all audit and non-audit services provided by a fund's independent registered public accounting firm relating to the operations or financial reporting of the fund. Prior to the commencement of any audit or non-audit services to a fund, the Audit Committee reviews the services to determine whether they are appropriate and permissible under applicable law.

The Audit Committee has adopted policies and procedures to, among other purposes, provide a framework for the Committee's consideration of non-audit services by the audit firms that audit the Fidelity funds. The policies and procedures require that any non-audit service provided by a fund audit firm to a Fidelity fund and any non-audit service provided by a fund auditor to a Fund Service Provider that relates directly to the operations and financial reporting of a Fidelity fund ("Covered Service") are subject to approval by the Audit Committee before such service is provided.

All Covered Services must be approved in advance of provision of the service either: (i) by formal resolution of the Audit Committee, or (ii) by oral or written approval of the service by the Chair of the Audit Committee (or if the Chair is unavailable, such other member of the Audit Committee as may be designated by the Chair to act in the Chair's absence). The approval contemplated by (ii) above is permitted where the Treasurer determines that action on such an engagement is necessary before the next meeting of the Audit Committee.

Non-audit services provided by a fund audit firm to a Fund Service Provider that do not relate directly to the operations and financial reporting of a Fidelity fund are reported to the Audit Committee on a periodic basis.

Non-Audit Services Approved Pursuant to Rule 2-01(c)(7)(i)(C) and (ii) of Regulation S-X ("De Minimis Exception")

There were no non-audit services approved or required to be approved by the Audit Committee pursuant to the De Minimis Exception during the Funds' last two fiscal years relating to services provided to (i) the Funds or (ii) any Fund Service Provider that relate directly to the operations and financial reporting of the Funds.

Item 5. Audit Committee of Listed Registrants

Not applicable.

Item 6. Investments

(a) Not applicable.

(b) Not applicable

Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies

Not applicable.

Item 8. Portfolio Managers of Closed-End Management Investment Companies

Not applicable.

Item 9. Purchase of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers

Not applicable.

Item 10. Submission of Matters to a Vote of Security Holders

There were no material changes to the procedures by which shareholders may recommend nominees to the trust's Board of Trustees.

Item 11. Controls and Procedures

(a)(i) The President and Treasurer and the Chief Financial Officer have concluded that the trust's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act) provide reasonable assurances that material information relating to the trust is made known to them by the appropriate persons, based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report.

(a)(ii) There was no change in the trust's internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act) that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the trust's internal control over financial reporting.

Item 12. Exhibits

(a)	(1)	Code of Ethics pursuant to Item 2 of Form N-CSR is filed and attached hereto as EX-99.CODE ETH.
(a)	(2)	Certification pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) is filed and attached hereto as Exhibit 99.CERT.
(a)	(3)	Not applicable.
(b)		Certification pursuant to Rule 30a-2(b) under the Investment Company Act of 1940 (17 CFR 270.30a-2(b)) is furnished and attached hereto as Exhibit 99.906CERT.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Fidelity Hereford Street Trust

By:	/s/John R. Hebble
	John R. Hebble
	President and Treasurer

Date:	June 25, 2009

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:	/s/John R. Hebble
	John R. Hebble
	President and Treasurer

Date:	June 25, 2009

By:	/s/Christine Reynolds
	Christine Reynolds
	Chief Financial Officer

Date:	June 25, 2009

Fidelity Hereford Street Trust N-CSRCertified annual shareholder report (management investment company)

Contents

Shareholder Expense Example

Investment Changes/Performance (Unaudited)

Investments April 30, 2009

Statement of Assets and Liabilities

Statement of Operations

Statement of Changes in Net Assets

Financial Highlights

Years ended April 30,

2009

2008

2007

2006

2005

Notes to Financial Statements

Report of Independent Registered Public Accounting Firm

Trustees and Officers

Contents

Shareholder Expense Example

Investment Changes/Performance (Unaudited)

Investments April 30, 2009

Statement of Assets and Liabilities

Statement of Operations

Statement of Changes in Net Assets

Financial Highlights

Years ended April 30,

2009

2008

2007

2006

2005

Notes to Financial Statements

Report of Independent Registered Public Accounting Firm

Trustees and Officers

Contents

Shareholder Expense Example

Investment Changes/Performance (Unaudited)

Investments April 30, 2009

Statement of Assets and Liabilities

Statement of Operations

Statement of Changes in Net Assets

Financial Highlights

Years ended April 30,

2009

2008

2007

2006

2005

Notes to Financial Statements

Report of Independent Registered Public Accounting Firm

Trustees and Officers

Managing Your Investments

To Write Fidelity

To Visit Fidelity