File Pursuant to Rule 424(b)(5)
                                                     Registration Nos. 333-45069
                                                                    333-45069-01
                                                                    333-45069-02

PROSPECTUS SUPPLEMENT
(To Prospectus dated February 9, 1998)

                                  $80,000,000

[LOGO] MISSISSIPPI POWER
       (A SOUTHERN COMPANY)

                      Series D Floating Rate Senior Notes
                              due March 12, 2004

                              -------------------

   Mississippi Power Company will pay interest on the Series D Senior Notes on
the 12th day of each March, June, September and December, beginning June 12,
2002. The per annum interest rate on the Series D Senior Notes for each
quarterly interest period will be reset quarterly based on the three-month
LIBOR rate plus 0.10%; however, under certain circumstances set forth in this
Prospectus Supplement, the interest rate on the Series D Senior Notes will be
determined without reference to LIBOR.

   The Series D Senior Notes are not redeemable prior to maturity.

   The Series D Senior Notes will be direct, unsecured and unsubordinated
obligations and will rank equally with all other unsecured and unsubordinated
obligations of Mississippi Power Company. The Series D Senior Notes will be
issued only in registered form in denominations of $1,000 and any integral
multiple thereof.

   The Series D Senior Notes should be delivered on or about March 22, 2002
through the book-entry facilities of The Depository Trust Company.



                                               Per Series D
                                               Senior Note     Total
                                               ------------ ------------
                                                      
        Public Offering Price.................    100.00%   $ 80,000,000
        Underwriting Discount.................      0.25%   $    200,000
        Proceeds to Mississippi- Power Company     99.75%   $79,800,000


   Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if
this Prospectus Supplement or the accompanying Prospectus is truthful or
complete. Any representation to the contrary is a criminal offense.

                              -------------------


LEHMAN BROTHERS
               BANC ONE CAPITAL MARKETS, INC.

March 12, 2002


   In making your investment decision, you should rely only on the information
contained or incorporated by reference in this Prospectus Supplement and the
attached Prospectus. We have not authorized anyone to provide you with any
other information. If you receive any unauthorized information, you must not
rely on it.

   We are offering to sell the Series D Senior Notes only in places where sales
are permitted.

   You should not assume that the information contained or incorporated by
reference in this Prospectus Supplement or the attached Prospectus, including
information incorporated by reference, is accurate as of any date other than
its respective date.

   CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE SERIES D SENIOR NOTES
OFFERED HEREBY, INCLUDING OVER-ALLOTMENT AND SHORT-COVERING TRANSACTIONS IN THE
SERIES D SENIOR NOTES, AND THE IMPOSITION OF A PENALTY BID, IN CONNECTION WITH
THE OFFERING. FOR A DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING."

                               -----------------

                               TABLE OF CONTENTS



                                                          Page
                                                          ----
                                                       
                 Prospectus Supplement
                 The Company............................. S-3.
                 Selected Financial Information.......... S-3.
                 Use of Proceeds......................... S-4.
                 Recent Results of Operations............ S-4.
                 Description of the Series D Senior Notes S-4.
                 Underwriting............................ S-8.
                 Experts................................. S-9.



                                                             Page
                                                             ----

                                                          
                Prospectus
                Available Information.......................  2
                Incorporation of Certain Documents by
                  Reference.................................  2
                Selected Information........................  3
                Mississippi Power Company...................  4
                The Trusts..................................  5
                Accounting Treatment........................  5
                Use of Proceeds.............................  5
                Recent Results of Operations................  5
                Description of the Senior Notes.............  6
                Description of the Junior Subordinated Notes  9
                Description of the Preferred Securities..... 14
                Description of the Guarantees............... 15
                Relationship Among the Preferred Securities,
                  the Junior Subordinated Notes and the
                  Guarantees................................ 17
                Plan of Distribution........................ 19
                Legal Matters............................... 19
                Experts..................................... 20


                                      S-2


                                  THE COMPANY

   Mississippi Power Company (the "Company") was incorporated under the laws of
the State of Mississippi on July 12, 1972, was admitted to do business in
Alabama on November 28, 1972 and, effective December 21, 1972, by the merger
into it of the predecessor Mississippi Power Company, succeeded to the business
and properties of the latter company. The predecessor Mississippi Power Company
was incorporated under the laws of the State of Maine on November 24, 1924 and
was admitted to do business in Mississippi on December 23, 1924 and in Alabama
on December 7, 1962. The Company has its principal office at 2992 West Beach
Boulevard, Gulfport, Mississippi 39501, telephone number (228) 864-1211. The
Company is a wholly owned subsidiary of The Southern Company.

   The Company is engaged in the generation and purchase of electric energy and
the distribution and sale of such energy within 23 counties of southeastern
Mississippi, at retail in 123 communities (including Biloxi, Gulfport,
Hattiesburg, Laurel, Meridian and Pascagoula), as well as in rural areas, and
at wholesale to one municipality, six rural electric distribution cooperative
associations and one generating and transmitting cooperative.

                        SELECTED FINANCIAL INFORMATION

   The following data is qualified in its entirety by reference to and,
therefore, should be read together with the detailed information and financial
statements appearing herein, in the accompanying Prospectus or in the documents
incorporated herein by reference.



                                                            Year Ended December 31,
                                                  --------------------------------------------
                                                    1997     1998     1999     2000     2001
                                                  -------- -------- -------- -------- --------
                                                           (Thousands, except ratios)
                                                                       
Operating Revenues............................... $543,588 $595,131 $633,004 $687,602 $796,065
Earnings Before Interest and Income Taxes........  113,149  118,232  121,620  122,270  132,671
Net Income After Dividends on Preferred Stock....   54,010   55,105   54,809   54,972   63,887
Ratio of Earnings to Fixed Charges(1)............     4.62     4.47     3.96     3.97     5.05
Ratio of Earnings to Fixed Charges Plus Preferred
  Dividend Requirements (Pre-Income Tax Basis)(2)     3.85     4.00     3.60     3.59     4.51




                                                                                    Capitalization
                                                                                As of December 31, 2001
                                                                            ------------------------------
                                                                              Actual       As Adjusted(3)
                                                                             --------    ------------------
                                                                            (Thousands, except percentages)
                                                                                           
Common Stock Equity........................................................ $491,680     $491,680    56.4%
Cumulative Preferred Stock.................................................   31,809       31,809     3.6
Company Obligated Mandatorily Redeemable Preferred Securities of Subsidiary
  Trusts Holding Company Junior Subordinated Notes.........................   35,000       35,000     4.0
Senior Notes...............................................................   87,178      167,178    19.2
Other Long-Term Debt.......................................................  146,575      146,575    16.8

                                                                             --------     --------   -----
   Total, excluding amounts due within one year............................ $792,242     $872,242   100.0%

                                                                             ========     ========   =====

- --------
(1) This ratio is computed as follows: (i) "Earnings" have been calculated by
    adding to "Earnings Before Interest and Income Taxes" the debt portion of
    allowance for funds used during construction; and (ii) "Fixed Charges"
    consist of "Net Interest Charges" plus the debt portion of allowance for
    funds used during construction.
(2) In computing this ratio, "Preferred Dividend Requirements" represent the
    before tax earnings necessary to pay such dividends, computed at the
    effective tax rates for the applicable periods.
(3) Reflects (i) the proposed issuance in March 2002 by Mississippi Power
    Capital Trust II of $35,000,000 aggregate liquidation amount of its Trust
    Preferred Securities for the benefit of the Company; (ii) the proposed
    redemption in April 2002 of $35,000,000 aggregate liquidation amount of
    Mississippi Power Capital Trust I 7.75% Trust Originated Preferred
    Securities issued for the benefit of the Company; and (iii) the issuance of
    the Series D Senior Notes offered hereby.

                                      S-3


                                USE OF PROCEEDS

   The net proceeds from the sale of the Series D Senior Notes will be applied
by the Company to repay $80,000,000 aggregate principal amount of its Series C
Floating Rate Senior Notes due March 28, 2002 at maturity.

                         RECENT RESULTS OF OPERATIONS

   For the year ended December 31, 2001, "Operating Revenues," "Earnings Before
Interest and Income Taxes" and "Net Income After Dividends on Preferred Stock"
were $796,065,000, $132,671,000 and $63,887,000, respectively. In the opinion
of the management of the Company, the above amounts for the year ended December
31, 2001 reflect all adjustments (which were only normal recurring adjustments)
necessary to present fairly the results of operations for such period. The
"Ratio of Earnings to Fixed Charges" and the "Ratio of Earnings to Fixed
Charges Plus Preferred Dividend Requirements (Pre-Income Tax Basis)" for the
year ended December 31, 2001 were 5.05 and 4.51, respectively.

                   DESCRIPTION OF THE SERIES D SENIOR NOTES

   Set forth below is a description of the specific terms of the Series D
Floating Rate Senior Notes due March 12, 2004 (the "Series D Senior Notes").
This description supplements, and should be read together with, the description
of the general terms and provisions of the Senior Notes set forth in the
accompanying Prospectus under the caption "Description of the Senior Notes."
The following description does not purport to be complete and is subject to,
and is qualified in its entirety by reference to, the description in the
accompanying Prospectus and the Senior Note Indenture dated as of May 1, 1998
(the "Senior Note Indenture") between the Company and Bankers Trust Company, as
trustee (the "Senior Note Indenture Trustee").

General

   The Series D Senior Notes will be issued as a series of senior notes under
the Senior Note Indenture. The Series D Senior Notes will be initially issued
in the aggregate principal amount of $80,000,000. The Company may, without the
consent of the holders of the Series D Senior Notes, issue additional notes
having the same ranking and the same interest rate, maturity and other terms
(except for the issue price and issue date) as the Series D Senior Notes. Any
additional notes having such similar terms, together with the Series D Senior
Notes, will constitute a single series of senior notes under the Senior Note
Indenture.

   The entire principal amount of the Series D Senior Notes will mature and
become due and payable, together with any accrued and unpaid interest thereon,
on March 12, 2004. The Series D Senior Notes are not subject to any sinking
fund provision. The Series D Senior Notes are available for purchase in
denominations of $1,000 and any integral multiple thereof.

Interest

   Each Series D Senior Note shall bear interest from the date of original
issuance, payable quarterly in arrears on March 12, June 12, September 12 and
December 12, as applicable, to the person in whose name such Series D Senior
Note is registered at the close of business on the 15th calendar day prior to
such payment date. The initial interest payment date is June 12, 2002. The
amount of interest payable will be computed on the basis of the actual number
of days elapsed over a 360-day year. If any interest payment date would
otherwise be a day that is not a Business Day, the interest payment date will
be the next succeeding Business Day.

   The Series D Senior Notes will bear interest for each quarterly Interest
Period at a per annum rate determined by the Calculation Agent, subject to the
maximum interest rate permitted by New York or other

                                      S-4


applicable state law, as such law may be modified by United States law of
general application. The interest rate applicable during each quarterly
Interest Period will be equal to LIBOR on the Interest Determination Date for
such Interest Period plus 0.10%; provided, however, that in certain
circumstances described below, the interest rate will be determined without
reference to LIBOR. Promptly upon such determination, the Calculation Agent
will notify the Company and the Senior Note Indenture Trustee, if the Senior
Note Indenture Trustee is not then serving as the Calculation Agent, of the
interest rate for the new Interest Period. The interest rate determined by the
Calculation Agent, absent manifest error, shall be binding and conclusive upon
the beneficial owners and holders of the Series D Senior Notes, the Company and
the Senior Note Indenture Trustee.

   If the following circumstances exist on any Interest Determination Date, the
Calculation Agent shall determine the interest rate for the Series D Senior
Notes as follows:

      (1)  In the event no Reported Rate (as defined below) appears on Telerate
   Page 3750 (as defined below) as of approximately 11:00 a.m., London time, on
   an Interest Determination Date, the Calculation Agent shall request the
   principal London offices of each of four major banks in the London interbank
   market selected by the Calculation Agent (after consultation with the
   Company) to provide a quotation of the rate (the "Rate Quotation") at which
   three-month deposits in amounts of not less than $1,000,000 are offered by
   it to prime banks in the London interbank market, as of approximately 11:00
   a.m., London time, on such Interest Determination Date, that is
   representative of single transactions at such time (the "Representative
   Amounts"). If at least two Rate Quotations are provided, the interest rate
   will be the arithmetic mean of the Rate Quotations obtained by the
   Calculation Agent, plus 0.10%.

      (2)  In the event no Reported Rate appears on Telerate Page 3750 as of
   approximately 11:00 a.m., London time, on an Interest Determination Date and
   there are fewer than two Rate Quotations, the interest rate will be the
   arithmetic mean of the rates quoted at approximately 11:00 a.m., New York
   City time, on such Interest Determination Date, by three major banks in New
   York City selected by the Calculation Agent (after consultation with the
   Company), for loans in Representative Amounts in U.S. dollars to leading
   European banks, having an index maturity of three months for a period
   commencing on the second London Business Day immediately following such
   Interest Determination Date, plus 0.10%; provided, however, that if fewer
   than three banks selected by the Calculation Agent are quoting such rates,
   the interest rate for the applicable Interest Period will be the same as the
   interest rate in effect for the immediately preceding Interest Period.

   Upon the request of a holder of the Series D Senior Notes, the Calculation
Agent will provide to such holder the interest rate in effect on the date of
such request and, if determined, the interest rate for the next Interest Period.

Certain Definitions

   The following definitions apply to the Series D Senior Notes:

   "Business Day" means a day other than (i) a Saturday or Sunday, (ii) a day
on which banks in New York, New York are authorized or obligated by law or
executive order to remain closed, or (iii) a day on which the Senior Note
Indenture Trustee's corporate trust office is closed for business.

   "Calculation Agent" means Bankers Trust Company, or its successor appointed
by the Company, acting as calculation agent.

   "Interest Determination Date" means the second London Business Day
immediately preceding the first day of the relevant Interest Period.

   "Interest Period" means the period commencing on an interest payment date
for the Series D Senior Notes (or, with respect to the initial Interest Period
only, commencing on the issue date for the Series D Senior Notes) and ending on
the day before the next succeeding interest payment date for the Series D
Senior Notes.

                                      S-5


   "LIBOR" for any Interest Determination Date will be the offered rate for
deposits in U.S. dollars having an index maturity of three months for a period
commencing on the second London Business Day immediately following the Interest
Determination Date in amounts of not less than $1,000,000, as such rate appears
on Telerate Page 3750 or a successor reporter of such rates selected by the
Calculation Agent and acceptable to the Company, at approximately 11:00 a.m.,
London time, on the Interest Determination Date (the "Reported Rate").

   "London Business Day" means a day that is a Business Day and a day on which
dealings in deposits in U.S. dollars are transacted, or with respect to any
future date are expected to be transacted, in the London interbank market.

   "Telerate Page 3750" means the display designated on page 3750 on Bridge
Telerate, Inc. (or such other page as may replace the 3750 page on that service
or such other service as may be nominated by the British Bankers' Association
for the purpose of displaying London interbank offered rates for U.S. dollar
deposits).

Ranking

   The Series D Senior Notes will be direct, unsecured and unsubordinated
obligations of the Company and will rank equally with all other unsecured and
unsubordinated obligations of the Company. The Series D Senior Notes will be
effectively subordinated to all secured debt of the Company, including its
first mortgage bonds, aggregating approximately $91,000,000 outstanding at
December 31, 2001. The Senior Note Indenture contains no restrictions on the
amount of additional indebtedness that may be incurred by the Company.

Redemption

   The Series D Senior Notes will not be redeemable at the option of the
Company prior to maturity.

Book-Entry Only Issuance--The Depository Trust Company

   The Depository Trust Company ("DTC") will act as the initial securities
depositary for the Series D Senior Notes. The Series D Senior Notes will be
issued only as fully registered securities registered in the name of Cede &
Co., DTC's nominee. One or more fully registered global Series D Senior Notes
certificates will be issued, representing in the aggregate the total principal
amount of Series D Senior Notes, and will be deposited with DTC.

   DTC is a limited-purpose trust company organized under the New York Banking
Law, a "banking organization" within the meaning of the New York Banking Law, a
member of the Federal Reserve System, a "clearing corporation" within the
meaning of the New York Uniform Commercial Code, and a "clearing agency"
registered pursuant to the provisions of Section 17A of the Securities Exchange
Act of 1934, as amended. DTC holds securities that its participants
("Participants") deposit with DTC. DTC also facilitates the settlement among
Participants of securities transactions, such as transfers and pledges, in
deposited securities through electronic computerized book-entry changes in
Participants' accounts, thereby eliminating the need for physical movement of
securities certificates. Direct Participants include securities brokers and
dealers, banks, trust companies, clearing corporations and certain other
organizations ("Direct Participants"). DTC is owned by a number of its Direct
Participants and by the New York Stock Exchange, Inc., the American Stock
Exchange, Inc. and the National Association of Securities Dealers, Inc. Access
to the DTC system is also available to others such as securities brokers and
dealers, banks and trust companies that clear through or maintain a custodial
relationship with a Direct Participant, either directly or indirectly
("Indirect Participants"). The rules applicable to DTC and its Participants are
on file with the Securities and Exchange Commission.

   Purchases of Series D Senior Notes within the DTC system must be made by or
through Direct Participants, which will receive a credit for the Series D
Senior Notes on DTC's records. The ownership interest of each actual purchaser
of Series D Senior Notes ("Beneficial Owner") is in turn to be recorded on the
Direct and Indirect

                                      S-6


Participants' records. Beneficial Owners will not receive written confirmation
from DTC of their purchases, but Beneficial Owners are expected to receive
written confirmations providing details of the transactions, as well as
periodic statements of their holdings, from the Direct or Indirect Participants
through which the Beneficial Owners purchased Series D Senior Notes. Transfers
of ownership interests in the Series D Senior Notes are to be accomplished by
entries made on the books of Participants acting on behalf of Beneficial
Owners. Beneficial Owners will not receive certificates representing their
ownership interests in Series D Senior Notes, except in the event that use of
the book-entry system for the Series D Senior Notes is discontinued.

   DTC has no knowledge of the actual Beneficial Owners of the Series D Senior
Notes. DTC's records reflect only the identity of the Direct Participants to
whose accounts such Series D Senior Notes are credited, which may or may not be
the Beneficial Owners. The Participants will remain responsible for keeping
account of their holdings on behalf of their customers.

   Conveyance of notices and other communications by DTC to Direct
Participants, by Direct Participants to Indirect Participants, and by Direct
Participants and Indirect Participants to Beneficial Owners will be governed by
arrangements among them, subject to any statutory or regulatory requirements as
may be in effect from time to time.

   Although voting with respect to the Series D Senior Notes is limited, in
those cases where a vote is required, neither DTC nor Cede & Co. will itself
consent or vote with respect to Series D Senior Notes. Under its usual
procedures, DTC would mail an Omnibus Proxy to the Company as soon as possible
after the record date. The Omnibus Proxy assigns Cede & Co.'s consenting or
voting rights to those Direct Participants to whose accounts the Series D
Senior Notes are credited on the record date (identified in a listing attached
to the Omnibus Proxy).

   Payments on the Series D Senior Notes will be made to DTC. DTC's practice is
to credit Direct Participants' accounts on the relevant payment date in
accordance with their respective holdings shown on DTC's records unless DTC has
reason to believe that it will not receive payments on such payment date.
Payments by Participants to Beneficial Owners will be governed by standing
instructions and customary practices, as is the case with securities held for
the account of customers registered in "street name," and will be the
responsibility of such Participant and not of DTC or the Company, subject to
any statutory or regulatory requirements as may be in effect from time to time.
Payment to DTC is the responsibility of the Company, disbursement of such
payments to Direct Participants is the responsibility of DTC, and disbursement
of such payments to the Beneficial Owners is the responsibility of Direct and
Indirect Participants.

   Except as provided herein, a Beneficial Owner of a global Series D Senior
Note will not be entitled to receive physical delivery of Series D Senior
Notes. Accordingly, each Beneficial Owner must rely on the procedures of DTC to
exercise any rights under the Series D Senior Notes. The laws of some
jurisdictions require that certain purchasers of securities take physical
delivery of securities in definitive form. Such laws may impair the ability to
transfer beneficial interests in a global Series D Senior Note.

   DTC may discontinue providing its services as securities depositary with
respect to the Series D Senior Notes at any time by giving reasonable notice to
the Company. Under such circumstances, in the event that a successor securities
depositary is not obtained, Series D Senior Notes certificates will be printed
and delivered to the holders of record. Additionally, the Company may decide to
discontinue use of the system of book-entry transfers through DTC (or a
successor depositary) with respect to the Series D Senior Notes. In that event,
certificates for the Series D Senior Notes will be printed and delivered to the
holders of record.

   The information in this section concerning DTC and DTC's book-entry system
has been obtained from sources that the Company believes to be reliable, but
the Company takes no responsibility for the accuracy thereof. The Company has
no responsibility for the performance by DTC or its Participants of their
respective obligations as described herein or under the rules and procedures
governing their respective operations.

                                      S-7


                                 UNDERWRITING

   Subject to the terms and conditions of the Underwriting Agreement, the
Company has agreed to sell to each of the Underwriters named below and each of
the Underwriters has severally agreed to purchase from the Company the
respective principal amount of Series D Senior Notes set forth opposite its
name below:



                                              Principal Amount of
                           Name              Series D Senior Notes
                           ----              ---------------------
                                          
              Lehman Brothers Inc...........      $48,000,000
              Banc One Capital Markets, Inc.       32,000,000
                                                  -----------
                     Total..................      $80,000,000
                                                  ===========


   In the Underwriting Agreement, the Underwriters have agreed, subject to the
terms and conditions set forth therein, to purchase all of the Series D Senior
Notes offered hereby if they purchase any of the Series D Senior Notes.

   The Underwriters propose to offer the Series D Senior Notes in part directly
to the public at the initial public offering price set forth on the cover page
of this Prospectus Supplement, and in part to certain securities dealers at
such price less a concession not in excess of $1.50 per Series D Senior Note.
The Underwriters may allow, and such dealers may reallow, a concession not in
excess of $1.00 per Series D Senior Note to certain brokers and dealers. After
the Series D Senior Notes are released for sale to the public, the offering
price and other selling terms may from time to time be varied by the
Underwriters.

   Prior to this offering, there has been no public market for the Series D
Senior Notes. The Underwriters have advised the Company that they intend to
make a market in the Series D Senior Notes. The Underwriters will have no
obligation to make a market in the Series D Senior Notes, however, and may
cease market making activities, if commenced, at any time.

   The Company has agreed to indemnify the Underwriters against certain
liabilities, including liabilities under the Securities Act of 1933, as amended.

   The Company's expenses associated with the offer and sale of the Series D
Senior Notes are estimated to be $235,000.

   In connection with this offering and in compliance with applicable law and
industry practice, the Underwriters may overallot or effect transactions which
stabilize, maintain or otherwise affect the market price of the Series D Senior
Notes at levels above those which might otherwise prevail in the open market,
including by entering stabilizing bids, purchasing Series D Senior Notes to
cover syndicate short positions and imposing penalty bids. A stabilizing bid
means the placing of any bid, or the effecting of any purchase, for the purpose
of pegging, fixing or maintaining the price of a security. Covering a syndicate
short position means placing a bid or effecting a purchase of a security on
behalf of the underwriting syndicate to reduce a short position created in
connection with the offering. Imposing a penalty bid means purchasing a
security in the open market to reduce the underwriting syndicate's short
position or to stabilize the price of the security and in connection therewith
reclaiming the amount of the selling concession from the underwriters and
selling group members who sold such securities as part of the offering.

   In general, purchases of a security for the purpose of stabilization or to
reduce a syndicate short position could cause the price of the security to be
higher than it might be in the absence of such purchases. The imposition of a
penalty bid might also have an effect on the price of a security to the extent
that it were to discourage resales of the security.

   Neither the Company nor any Underwriter makes any representation or
prediction as to the direction or magnitude of any effect that the transactions
described above may have on the price of the Series D Senior

                                      S-8


Notes. In addition, neither the Company nor any Underwriter makes any
representation that such transactions will be engaged in or that such
transactions, once commenced, will not be discontinued without notice.

   The Underwriters and their affiliates engage in transactions with and
perform services for the Company in the ordinary course of business and have
engaged, and may in the future engage, in commercial banking and/or investment
banking transactions with the Company or its affiliates.

                                    EXPERTS

   The financial statements of the Company included in the Company's Current
Report on Form 8-K dated February 13, 2002, incorporated by reference herein,
have been audited by Arthur Andersen LLP, independent public accountants, as
indicated in their report with respect thereto, and are incorporated herein in
reliance upon the authority of said firm as experts in accounting and auditing
in giving said report.


                                      S-9



                                  $80,000,000

[LOGO] MISSISSIPPI POWER
       (A SOUTHERN COMPANY)

                      Series D Floating Rate Senior Notes
                              due March 12, 2004

                              -------------------

                             PROSPECTUS SUPPLEMENT
                             Dated March 12, 2002

                              -------------------

                                LEHMAN BROTHERS

                        BANC ONE CAPITAL MARKETS, INC.