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

                                    FORM 8-K
                                 CURRENT REPORT

                       Pursuant to Section 13 or 15(d) of
                       the Securities Exchange Act of 1934

                Date of Report (Date of earliest event reported):

                                 April 23, 2003

                                TriCo Bancshares
             (Exact name of registrant as specified in its charter)

       California                   0-10661                   94-2792841
- ------------------------        ---------------          --------------------
     (State or other         (Commission File No.)         (I.R.S. Employer
     jurisdiction of                                      Identification No.)
incorporation or organization)

                 63 Constitution Drive, Chico, California 95973
- --------------------------------------------------------------------------------
              (Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code:               (530) 898-0300


Item 7(c): Exhibits
- -------------------

        99.1     Press release dated April 23, 2003

Item 9:  Regulation FD Disclosure
- ---------------------------------

(Furnished under Item 12)

This Current Report on Form 8-K is being furnished pursuant to Item 12, "Results
of Operations  and Financial  Condition,"  in accordance  with interim  guidance
promulgated by the Securities  and Exchange  Commission in Release No.  34-47583
that was  issued  March 27,  2003.  See  "Item 12:  Results  of  Operations  and
Financial Condition" below.

Item 12:  Results of Operations and Financial Condition
- -------------------------------------------------------

On April 23, 2003 TriCo  Bancshares  announced their quarterly  earnings for the
first  quarter of 2003. A copy of the press  release is attached as Exhibit 99.1
to this Form 8-K and is incorporated herein by reference.




SIGNATURES

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

                                   TRICO BANCSHARES

Date:  April 23, 2003         By:  /s/ Thomas J. Reddish
                                   --------------------------------------
                                   Thomas J. Reddish, Vice President and
                                   Chief Financial Officer (Principal
                                   Financial and Accounting Officer)


INDEX TO EXHIBITS

Exhibit No.                Description
- -----------                --------------------------------------------

    99.1                   Press release dated April 23, 2003








Exhibit 99.1


PRESS RELEASE                                    Contact:   Thomas J. Reddish
                                                            Vice President & CFO
For Immediate Release                                       (530) 898-0300


            TRICO BANCSHARES ANNOUNCES 1ST QUARTER EARNINGS FOR 2003
            --------------------------------------------------------

     Chico,  CA -- April 23,  2003.  TriCo  Bancshares  (NASDAQ:  TCBK),  parent
company of Tri Counties Bank, today announced  quarterly earnings of $3,613,000,
or $0.50 per diluted  share,  for the three months  ended March 31, 2003.  These
results  represent a 6.4%  increase  from the $0.47  earnings per diluted  share
reported for the three months ended March 31, 2002 on earnings of $3,329,000.
     The improvement in results from the year-ago  quarter was due to a $543,000
(4.2%) increase in fully  tax-equivalent  net interest income to $13,543,000,  a
$650,000  (81.3%)  decrease  in  provision  for loan  losses  to  $150,000  from
$800,000, and a $1,570,000 (41.0%) increase in noninterest income to $5,396,000.
These  contributing  factors  where offset by a $2,249,000  (21.6%)  increase in
noninterest expense to $12,651,000 for the quarter ended March 31, 2003.
     Richard Smith,  President and Chief Executive Officer,  commented that, "We
are pleased with the results for the quarter  ended March 31, 2003. We were able
to grow net  interest  income and net income from  year-ago  levels  despite the
continued  low interest rate  environment.  The addition of four new branches in
2002, along with the efforts of our previously existing branches, has allowed us
to significantly  grow our customer base.  Internally  generated deposits are up
18% from year-ago levels.  These new customers,  and new deposit products,  have
allowed us to increase deposit-related noninterest income by 77.4% from year-ago
levels.  Consumer lending continued to drive our loan growth, which at March 31,
2003 was up 9% from year-ago levels.  Our mortgage banking division continues to
contribute  to our  success  during  this  period  of  extremely  high  mortgage
refinance volume."
     During the  quarters  ended  March 31,  2003 and 2002,  the  Company's  net
interest margin was 5.17% and 5.76%,  respectively,  on  interest-earning  asset
balances  averaging $1.048 billion and $903 million,  respectively.  Noninterest
income  increased  $1,570,000  (41.0%) due to a $1,527,000  (77.4%)  increase in
deposit product services charges and fees to $3,500,000,  and a $170,000 (17.6%)
increase in gain on sale of residential  mortgage loans to $1,133,000 during the
quarter ended March 31, 2003 compared to the year-ago quarter.  Offsetting these
increases in noninterest income was a $90,000 (16.7%) decrease in commissions on
sale of  nondeposit  investment  products  to  $448,000,  and a $37,000  (10.5%)
decrease in other noninterest income.
     Noninterest expense increased  $2,249,000 (21.6%) to $12,651,000 during the
quarter  ended March 31, 2003  compared to the  year-ago  quarter.  Salaries and
benefits expense increased  $1,138,000  (19.8%) to $6,877,000.  This increase in
salaries and benefits expense was due to four branches opened in 2002, increased
commissions  related to  mortgage  banking,  increased  incentive  payments  for
deposit and loan product  sales,  annual salary  increases,  and higher rates on
workers compensation expense.  Other noninterest expenses,  including intangible
amortization,  increased  $1,111,000 (23.8%) to $5,774,000 due to the new branch
openings in 2002, and expenses  related to increased  mortgage  banking activity
and a new deposit product introduced in July 2002.
     Nonperforming  assets,  net of  U.S.  Government  agency  guarantees,  were
$9,103,000,  $9,112,000 and $9,906,000 as of March 31, 2003,  December 31, 2002,
and  March 31,  2002,  respectively.  Provision  for loan  losses  for the first
quarter of 2003 was $150,000  versus  $800,000 in the same quarter in 2002.  The
Company  had net loan  charge-offs  of  $234,000  in the first  quarter  of 2003
compared to $521,000 of net loan  charge-offs  in the same period of 2002. As of
March 31, 2003 and 2002,  the ratio of allowance  for loan losses to total loans
was 2.06% and 2.09%, respectively.



     Assets  of the  Company  totaled  $1.18  billion  at March  31,  2003,  and
represented  an increase of $177 million  (17.7%) from $1.0 billion at March 31,
2002.
     For the first  quarter of 2003,  the  Company had an  annualized  return on
assets  of 1.26% and a return on  equity  of  14.29%  versus  1.34% and  14.88%,
respectively,  in the  first  quarter  of 2002.  As of  March  31,  2003,  TriCo
Bancshares  had a Tier 1 capital ratio of 10.4% and a total  risk-based  capital
ratio of 11.6%.
     As  previously  announced  on  October  19,  2001,  the Board of  Directors
approved a plan to repurchase,  as conditions  warrant,  up to 150,000 shares of
the  Company's  common  stock  on the open  market  or in  privately  negotiated
transactions.  The  timing of  purchases  and the  exact  number of shares to be
purchased will depend on market  conditions.  This repurchase  plan  represented
approximately  2.2% of the  Company's  6,992,080  common shares  outstanding  on
October  19,  2001,  and  is  open-ended.  As of  this  date,  the  Company  has
repurchased 118,800 shares under this plan.
     Mr.  Smith  continued,  "We are  extremely  pleased  with  the  merger  and
integration of North State National Bank into Tri Counties on April 4, 2003. Our
team  members  worked very well to  accomplish  the complete  conversion  of all
customer  service and accounting  systems over the weekend of April 5th and 6th.
It appears that the  customers and employees of North State are as excited as we
are about their joining the Tri Counties Bank family."
     On April 7, 2003,  the Company  announced  its  acquisition  of North State
National Bank by the merger of North State into its wholly owned subsidiary, Tri
Counties  Bank,  effective  5:01 pm on April 4, 2003.  Under terms of the merger
agreement,  TriCo will issue $13,090,105 in cash, 723,511 shares of TriCo common
stock, and options to purchase 79,587 TriCo common shares at an average exercise
price of $6.22 per share in exchange for all of the 1,234,375  common shares and
options  to  purchase   79,937  common  shares  of  North  State  National  Bank
outstanding  as of April 4,  2003.  At March  31,  2003,  TriCo  Bancshares  had
7,080,470 shares of common stock  outstanding.  Based upon TriCo's closing stock
price of $25.65 on April 4, 2003, the aggregate  value of the cash and the TriCo
options  and  common  stock to be issued in the  merger  would be  approximately
$33,195,000.  North State National Bank, with its two branches in Chico,  brings
approximately $140 million in total assets to Tri Counties Bank.
     In addition to the  historical  information  contained  herein,  this press
release contains certain  forward-looking  statements.  The reader of this press
release should understand that all such  forward-looking  statements are subject
to  various  uncertainties  and risks  that  could  affect  their  outcome.  The
Company's  actual results could differ  materially  from those suggested by such
forward-looking  statements.  Factors  that could  cause or  contribute  to such
differences  include,  but are not limited to,  variances  in the actual  versus
projected  growth in assets,  return on assets,  loan  losses,  expenses,  rates
charged on loans and earned on securities  investments,  rates paid on deposits,
competition  effects,  fee and other noninterest  income earned as well as other
factors.  This entire press release  should be read to put such  forward-looking
statements  in  context  and  to  gain  a  more  complete  understanding  of the
uncertainties and risks involved in the Company's business.
     TriCo  Bancshares  and  Tri  Counties  Bank  are  headquartered  in  Chico,
California.  Tri Counties  Bank has a 28 year  history in the banking  industry.
Following the  acquisition  of North State  National Bank on April 4, 2003,  Tri
Counties  Bank now has  approximately  $1.3  billion in assets,  and operates 33
traditional  branch  locations and 10 in-store branch locations in 20 California
counties. Tri Counties Bank offers financial services and provides a diversified
line of products and services to consumers and businesses, which include demand,
savings and time deposits,  consumer finance, online banking,  mortgage lending,
and commercial  banking  throughout its market area. It operates a network of 54
ATMs  and a  24-hour,  seven  days a week  telephone  customer  service  center.
Brokerage  services are provided at the Bank's offices by the Bank's association
with Raymond James Financial,  Inc. For further information please visit the Tri
Counties Bank web-site at http://www.tricountiesbank.com






                                      TRICO BANCSHARES - CONSOLIDATED FINANCIAL DATA
                                       (Dollars in thousands, except per share data)

                                                                             Three months ended
                                                  ---------------------------------------------------------------------------
                                                    March 31,     December 31,    Sept. 30,       June 30,      March 31,
                                                       2003           2002           2002           2002           2002
                                                  ---------------------------------------------------------------------------
                                                                                                    
Balance Sheet Data
      Cash and due from banks                        $ 58,925       $ 67,170       $ 56,749       $ 54,094       $ 42,647
      Fed funds sold                                   10,100          8,100         23,400         27,800         55,200
      Securities, available-for-sale                  354,007        338,024        268,921        234,544        222,594
      Loans
         Commercial loans                             117,329        125,982        142,290        138,770        123,026
         Consumer loans                               210,633        201,858        191,601        171,178        157,428
         Real estate mortgage loans                   330,001        319,969        313,191        321,260        315,590
         Real estate construction loans                35,810         39,713         36,472         40,592         41,164
      Total loans, gross                              693,773        687,522        683,554        671,800        637,208
      Allowance for loan losses                       (14,293)       (14,377)       (14,382)       (13,613)       (13,337)
      Premises and equipment                           17,542         17,224         16,583         16,195         16,136
      Cash value of life insurance                     29,257         15,208         15,045         14,927         14,722
      Intangible assets                                 3,815          4,043          4,387          4,615          4,842
      Other assets                                     23,377         21,660         19,266         19,199         19,921
      Total assets                                  1,176,503      1,144,574      1,073,523      1,029,561        999,933
         Noninterest bearing demand deposits          226,373        232,499        202,895        188,546        172,087
         Interest bearing demand deposits             188,575        182,816        175,883        169,343        174,852
         Savings deposits                             324,584        297,926        268,182        255,264        256,845
         Time certificates                            293,120        291,996        290,935        284,757        269,488
      Total deposits                                1,032,652      1,005,237        937,895        897,910        873,272
      Fed funds purchased & repurchase agreements           -              -              -              -              -
      Other liabilities                                19,044         17,399         16,275         15,589         14,996
      Other borrowings                                 22,915         22,924         22,932         22,940         22,948
      Total liabilities                             1,074,611      1,045,560        977,102        936,439        911,216
      Total shareholders' equity                      101,892         99,014         96,421         93,122         88,717
      Accumulated other
         comprehensive income                           2,688          2,303          2,333          1,393           (611)
      Average loans                                   679,975        675,626        676,009        648,618        642,082
      Average interest earning assets               1,048,286      1,013,175        954,611        921,486        902,596
      Average total assets                          1,149,759      1,112,660      1,044,518      1,009,727        990,471
      Average deposits                              1,003,853        970,666        908,675        879,579        863,029
      Average total equity                          $ 101,139       $ 97,684       $ 95,645       $ 91,429       $ 89,505








                                    TRICO BANCSHARES - CONSOLIDATED FINANCIAL DATA
                                    (Dollars in thousands, except per share data)

                                                                        Three months ended
                                             --------------------------------------------------------------------------
                                               March 31,     December 31,    Sept. 30,      June 30,      March 31,
                                                  2003           2002           2002          2002           2002
                                             --------------------------------------------------------------------------
                                                                                                
Statement of Income Data
      Interest income                           $ 16,349       $ 16,228       $ 16,435      $ 16,075       $ 15,958
      Interest expense                             3,115          3,245          3,227         3,179          3,263
      Net interest income                         13,234         12,983         13,208        12,896         12,695
      Provision for loan losses                      150            800            700           500            800
      Noninterest income:
         Service charges and fees                  3,500          3,651          3,521         2,141          1,973
         Other income                              1,896          2,347          1,892         1,802          1,853
      Total noninterest income                     5,396          5,998          5,413         3,943          3,826
      Noninterest expense:
         Salaries and benefits                     6,877          6,434          6,344         5,773          5,739
         Intangible amortization                     228            228            228           228            228
         Other expense                             5,546          5,811          5,561         4,962          4,435
      Total noninterest expense                   12,651         12,473         12,133        10,963         10,402
      Net income before taxes                      5,829          5,708          5,788         5,376          5,319
      Net income                                 $ 3,613        $ 3,748        $ 3,627       $ 3,365        $ 3,329
Share Data
      Basic earnings per share                    $ 0.51         $ 0.53         $ 0.52        $ 0.48         $ 0.48
      Diluted earnings per share                    0.50           0.52           0.50          0.47           0.47
      Book value per common share                $ 14.39        $ 14.02        $ 13.70       $ 13.25        $ 12.69
      Shares outstanding                       7,080,470      7,060,965      7,035,590     7,025,690      6,990,980
      Weighted average shares                  7,070,701      7,046,246      7,026,120     7,011,306      6,992,480
      Weighted average diluted shares          7,250,178      7,211,705      7,231,165     7,213,800      7,117,374
Credit Quality
      Non-performing loans, net of
          government agency guarantees           $ 7,495        $ 8,180       $ 11,031       $ 9,533        $ 9,835
      Other real estate owned                      1,608            932              -            71             71
      Loans charged-off                              280            870             73           282            561
      Loans recovered                               $ 46           $ 66          $ 141          $ 58           $ 40
      Allowance for loan losses to total loans     2.06%          2.09%          2.10%         2.03%          2.09%
      Allowance for loan losses to NPLs             191%           176%           130%          143%           136%
      Allowance for loan losses to NPAs             157%           158%           130%          142%           135%
Selected Financial Ratios
      Return on average total assets               1.26%          1.35%          1.39%         1.33%          1.34%
      Return on average equity                    14.29%         15.35%         15.17%        14.72%         14.88%
      Average yield on loans                       7.64%          7.75%          7.89%         8.05%          8.10%
      Average yield on earning assets              6.36%          6.53%          7.02%         7.12%          7.21%
      Average rate on earning liabilities          1.52%          1.65%          1.72%         1.74%          1.82%
      Net interest margin                          5.17%          5.25%          5.67%         5.74%          5.76%
      Total risk based capital ratio               11.6%          12.0%          11.9%         12.0%          12.1%
      Tier 1 Capital ratio                         10.4%          10.7%          10.6%         10.8%          10.9%