SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 11-K

(Mark One)
     [X]  ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT
          OF 1934

          For the fiscal year ended December 31, 2001

     [ ]  TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE
          ACT OF 1934

          For the transition period from ________ to _______

Commission File Number 0-3683

Full title of the Plan and the address of the Plan,  if  different  from that of
the issuer named below:

                       Trustmark National Bank 401(k) Plan
                            (Full Title of the Plan)

Name of issuer of the  securities  held  pursuant to the Plan and the address of
its principal executive office:
                              Trustmark Corporation
                              248 E. Capitol Street
                           Jackson, Mississippi 39201
    (Name of Issuer of Securities and address of Principal Executive Office)








                       TRUSTMARK NATIONAL BANK 401(K) PLAN

                        Financial Statements and Schedule
                           December 31, 2001 and 2000
                   (With Independent Auditors' Report Thereon)









                       TRUSTMARK NATIONAL BANK 401(K) PLAN



                   Index to Financial Statements and Schedule



Independent Auditors' Report

Statements of Net Assets Available for Benefits as of December 31, 2001 and 2000

Statement of Changes in Net Assets Available for Benefits for the year ended
     December 31, 2001

Notes to Financial Statements

Supplemental Schedule:

Schedule  H, Line 4i - Schedule  of Assets  (Held at End of Year) as of December
31, 2001

All other schedules are omitted because there is no information to report.







                          Independent Auditors' Report



The Plan Administrator
Trustmark National Bank 401(k) Plan:


We have audited the accompanying  statement of net assets available for benefits
of Trustmark  National Bank 401(k) Plan (the Plan) as of December 31, 2001,  and
the related  statement of changes in net assets  available  for benefits for the
year ended December 31, 2001. These financial  statements are the responsibility
of the Plan's  management.  Our responsibility is to express an opinion on these
financial  statements  based on our audit. The statement of net assets available
for benefits as of December 31, 2000, was audited by other auditors whose report
thereon dated June 14, 2001, expressed an unqualified opinion on the statement.

We conducted our audit in accordance with auditing standards  generally accepted
in the  United  States of  America.  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.  An audit also includes assessing the accounting principles used and
significant  estimates  made by  management,  as well as evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audit  provides  a
reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all  material  respects,  the net assets  available  for  benefits of  Trustmark
National  Bank 401(k) Plan as of December 31,  2001,  and the changes in its net
assets  available  for  benefits  for the  year  ended  December  31,  2001,  in
conformity with accounting principles generally accepted in the United States of
America.

Our audit was  performed  for the  purpose  of  forming  an opinion on the basic
financial statements taken as a whole. The supplemental schedule of assets (held
at end of year) is not a required part of the basic financial  statements but is
supplementary  information  required  by the  Department  of  Labor's  Rules and
Regulations for Reporting and Disclosure  under the Employee  Retirement  Income
Security Act of 1974. The  supplemental  schedule is the  responsibility  of the
Plan's management.  The supplemental schedule has been subjected to the auditing
procedures  applied in the audit of the 2001 basic financial  statements and, in
our opinion,  is fairly stated in all material  respects in relation to the 2001
basic financial statements taken as a whole.

                                  /s/ KPMG LLP
                                  ------------
                                      KPMG LLP

Jackson, Mississippi
June 7, 2002







                        TRUSTMARK NATIONAL BANK 401(K) PLAN
                   Statements of Net Assets Available for Benefits
                             December 31, 2001 and 2000

                                                      2001           2000
                                                  ------------   -----------
  Receivables:
     Sponsor contributions                        $  2,650,000   $ 2,650,000
     Participant contributions                         124,809       125,464
                                                  ------------   -----------
              Total receivables                      2,774,809     2,775,464
  Investments, at fair value:
     Money market accounts                           9,956,151     7,345,153
     Fixed income mutual funds                       4,747,472     2,658,053
     Common stock of Trustmark Corporation          62,084,423    56,878,276
     Equity mutual funds                            22,760,031    22,222,659
                                                  ------------   -----------

              Total investments                     99,548,077    89,104,141
                                                  ------------   -----------

              Net assets available for benefits   $102,322,886   $91,879,605
                                                  ============   ===========
See accompanying notes to financial statements.








                           TRUSTMARK NATIONAL BANK 401(K) PLAN
                Statement of Changes in Net Assets Available for Benefits
                              Year ended December 31, 2001



   Contributions:
                                                                    
        Sponsor                                                          $  2,671,871
        Participant                                                         3,676,148
                                                                         ------------
                 Total contributions                                        6,348,019
                                                                         ------------
   Net investment income:
        Net appreciation in fair value of investments                       7,692,104
        Interest income                                                       471,790
        Dividend income                                                       319,594
                                                                         ------------
                 Net investment income                                      8,483,488
                                                                         ------------
     Benefits paid to participants                                         (4,388,226)
                                                                         ------------
                 Net increase in net assets available for benefits         10,443,281
Net assets available for benefits:
    Beginning of year                                                      91,879,605
                                                                         ------------
    End of year                                                          $102,322,886
                                                                         ============

See accompanying notes to financial statements.






                       Trustmark National Bank 401(K) Plan

                          Notes to Financial Statements

                           December 31, 2001 and 2000




(1)    Plan Description

       The  following  description  of Trustmark  National Bank 401(k) Plan (the
       Plan) provides only general information. Participants should refer to the
       Plan agreement for a more complete description of the Plan's provisions.

       (a)    General

              The  Plan  is a  defined  contribution  plan  established  for the
              employees of  Trustmark  National  Bank (the  Company) and certain
              other associated companies.  Employees who are active participants
              in  the  Canton  Exchange  Bank  Employee's  Retirement  Plan  are
              ineligible  to   participate   in  the  Plan.  The  Plan  provides
              eligibility for  participation  on the next semiannual  entry date
              (January 1st or July 1st)  following  the  completion  of at least
              1,000 hours of service  during the  twelve-month  period ending on
              the anniversary of a person's employment commencement date.

       (b)    Plan Administration

              The Plan's record keeping and trust functions are handled by Bisys
              Plan Services and Frontier and Reliance Trusts, respectively.  The
              plan administrator is Trustmark National Bank.

       (c)    Employee Contributions

              The Plan allows  participants to make voluntary  before-tax salary
              deferral contributions,  through payroll deductions, to separately
              invested  funds in accordance  with Section 401(k) of the Internal
              Revenue Code.  If certain  requirements  of Internal  Revenue Code
              Section 401(k) are not met in Plan operation,  the salary deferral
              agreements of participants may, on a nondiscriminatory and uniform
              basis,  be amended or revoked to preserve the qualified  status of
              the Plan.  Voluntary  after-tax  contributions by participants are
              not allowed. Participants may direct investment of their voluntary
              contributions among several investment options.

              Employees can elect to contribute up to 15% of their  compensation
              each  period,  subject  to  regulatory  limitations.   Any  excess
              contributions  must be returned to the  applicable  participant by
              April  15 of the  calendar  year  following  the  year  of  excess
              contributions. The Plan does not allow rollover contributions from
              individual retirement accounts or other qualified plans.

       (d)    Employer Contributions

              In  general,   employee  contributions  are  not  matched  by  the
              employer;  however,  former  participants  of Rankin  County  Bank
              401(k) Plan are eligible  for a 100% match of their  contributions
              up to 3% of their  annual  compensation.  The Company  contributed
              $2,671,871 to the Plan in 2001. Of this amount,  $2,650,000  was a
              discretionary contribution.

       (e)    Allocations

              Employee and employer contributions are allocated directly to each
              participant's   account   in   accordance   with  the   individual
              participant's elections.

              Investment earnings or losses of the Plan's investment options are
              allocated based on the investment  earnings base multiplied by the
              calculated  rate of return for the separate  investment  accounts.
              The  investment  earnings  base is  calculated as beginning of the
              year  account  balance  plus one half of the  current  year salary
              deferral contributions less withdrawals and transfers out.

              Forfeitures  of  nonvested  employer  match  accounts  are used to
              reduce the employer match contribution.




       (f)    Vesting

              On the first  day of the  month  coincident  with or  following  a
              participant's  sixty-fifth birthday,  such participant is entitled
              to retire from active  service with the employer,  and 100% of the
              value of the participant's share of the Plan becomes fully vested.
              A  participant  also  vests  100%  upon  death or  termination  of
              employment due to permanent disability.

              Participants   are   immediately   vested   in   their   voluntary
              contributions and discretionary safe-harbor employer contributions
              and vest in their  employer  match  contributions  as shown in the
              following schedule:

                       Years vesting service    Vested percentage
                       ---------------------    -----------------

                            Less than 5                  0%
                             5 or more                 100%


              In  case  of   termination   of  the  Plan,   the  value  of  each
              participant's  share of the Plan  becomes  fully  vested as of the
              date of such termination.

       (g)    Payment of Benefits

              On retirement,  death,  disability,  or termination of service,  a
              participant may elect to receive a lump-sum  distribution equal to
              his or her vested account balance or a life annuity.  In addition,
              hardship distributions are permitted if certain criteria are met.

       (h)    Plan Termination

              Although it has not expressed any intent to do so, the Company has
              the right under the Plan to discontinue its  contributions  at any
              time and to terminate the Plan subject to the provisions of ERISA.
              However,  no such action may derive any participant or beneficiary
              under the Plan of any vested right.

(2)    Significant Accounting Policies

       (a)    Basis of Presentation

              The Plan's  financial  statements  are prepared  using the accrual
              basis  of  accounting,  with  the  exception  of  the  payment  of
              benefits, which are recognized as a reduction in the net assets of
              the Plan as they are  disbursed  to  participants.  Purchases  and
              sales of securities are recorded on a trade-date basis.

       (b)    Use of Estimates

              The  preparation  of  financial   statements  in  conformity  with
              accounting  principles  generally accepted in the United States of
              America requires management to make estimates and assumptions that
              affect the reported amounts of net assets and changes therein, and
              disclosure of contingent  assets and  liabilities.  Actual results
              could differ from those estimates.

       (c)    Valuation of Investments

              Cash equivalents are stated at cost which approximates fair value.
              Marketable securities are stated at fair value.  Securities traded
              on a national  securities exchange are valued at the last reported
              sales price on the last business day of the year.

       (d)    Net Appreciation in Fair Value of Investments

              Net appreciation in fair value of investments,  as recorded in the
              accompanying  statement  of changes in net  assets  available  for
              benefits,  includes changes in fair value of investments acquired,
              sold, or held during the year.

       (e)    Administrative Fees

              Professional fees incurred by the Plan are paid by the Company.




(3)    Investments

       The fair value of individual investments that represent 5% or more of the
       Plan's net assets as of December 31, 2001 and 2000 are as follows:



                                                                                         December 31,
                                                                                 --------------------------
                                                                                     2001          2000
                                                                                 -----------   ------------

      Investment at fair value as determined by quoted market price:
                                                                                           
          Common stock of Trustmark Corporation                                  $62,084,423    $56,878,276
          Performance Funds Trust Mutual Funds:
            Large-Cap Equity Fund                                                 10,571,905     10,154,309
            Mid-Cap Equity Fund                                                    7,555,686      7,750,427
      Investments at cost which approximates fair value:
          Federated Capital Preservation Fund                                      9,729,922      7,159,421






       During 2001, the Plan's  investments  (including  investments  bought and
       sold, as well as held during the year) appreciated (depreciated) in value
       as follows:

      Investments at fair value as determined by quoted market price:
          Common stock of Trustmark Corporation              $9,655,981
          Performance Funds Trust Mutual Funds:
            Short Term Govt. Inst. Fund                          46,990
            Intermediate Term Govt. Inst. Fund                   27,260
            Leader's Equity Fund                               (103,798)
            Large-Cap Equity Fund                            (1,171,126)
            Small-Cap Equity Fund                              (105,586)
            Mid-Cap Equity Fund                                (517,611)
          Templeton Foreign Fund                               (140,006)
                                                             ----------
             Net appreciation in fair value of investments   $7,692,104
                                                             ==========


(4)    Income Tax Status

       The Internal Revenue Service has determined and informed the Company by a
       letter dated June 1, 1998,  that the Plan and related  trust are designed
       in  accordance  with  applicable  sections of the  Internal  Revenue Code
       (IRC).  The Plan has  been  amended  since  receiving  the  determination
       letter.  However,  the plan  administrator  and the  Plan's  tax  counsel
       believe  that the Plan is designed  and is  currently  being  operated in
       compliance with the applicable requirements of the IRC.

(5)    Related Parties

       Plan assets include investments held with the Company.  These investments
       do not  constitute  prohibited  transactions  as defined in ERISA Section
       406(a).  Trustmark National Bank serves as the investment advisor for the
       Performance Funds Trust Mutual Funds. Trustmark Corporation is the parent
       company of Trustmark National Bank.

(6)    Reconciliation of Financial Statements to Form 5500

       As of December 31, 2001,  the Plan had  approximately  $72,000 of pending
       distributions to participants who elected to withdraw from the Plan. This
       amount is recorded as a liability in the Plan's Form 5500; however,  this
       amount is not  recorded as a liability in the  accompanying  statement of
       net  assets   available  for  benefits  in  accordance   with  accounting
       principles generally accepted in the United States of America.






       The following table reconciles financial information per the accompanying
       financial  statements  to the Form 5500 as filed by the  Company  for the
       year ended December 31, 2001:



                                                           Benefits     Benefits    Net Assets
                                                           Payable        Paid     Available for
                                                                                   Plan Benefits
                                                           ---------   ----------  -------------
                                                                          
      Per accompanying financial statements                $     --    $4,388,226   $102,322,886
      2000 amounts pending distribution to
          participants                                           --       (82,000)            --
      2001 amounts pending distribution to
          participants                                       72,000        72,000        (72,000)
                                                           ---------   ----------  -------------

                    Per Form 5500                          $ 72,000    $4,378,226   $102,250,886
                                                           =========   ==========  =============



(7)    Contingencies

       Trustmark  Corporation  (the Company's  parent) and its  subsidiaries are
       parties to lawsuits and other claims that arise in the ordinary course of
       business.  Some of the lawsuits assert claims related to various business
       activities;  and  some of the  lawsuits  allege  substantial  claims  for
       damages. The cases are being vigorously contested.  In the regular course
       of business,  management  evaluates  estimated losses or costs related to
       litigation,  and  provision  is  made  for  anticipated  losses  whenever
       management  believes  that such losses are probable and can be reasonably
       estimated. At the present time, management believes,  based on the advice
       of legal counsel,  that the final resolution of pending legal proceedings
       will not have a material impact on Trustmark  Corporation's or the Plan's
       consolidated financial position or results of operations.

(8)    Subsequent Events

       Effective January 1, 2002, Trustmark  Corporation will assume sponsorship
       of the  Plan and the Plan  will be  renamed  Trustmark  401(k)  Plan.  In
       addition,  the Plan will be  amended  and  restated  by  adoption  of the
       Trustmark  National Bank Prototype  Defined  Contribution Plan and Trust.
       The provisions of the Plan will remain  substantially the same except for
       a change  in the  employer  safe  harbor  contribution  for  purposes  of
       sections  401(k) and 401(m) of the IRC from a 3% nonelective  safe harbor
       contribution  to a matching safe harbor  contribution at the rate of 100%
       of the first 3% and 50% of the next 3% of covered compensation.





                          TRUSTMARK NATIONAL BANK 401(K) PLAN
                         Plan Sponsor: Trustmark National Bank
                              Plan Sponsor: EIN 64-0180810
                                Plan Number: 002
         Schedule H, Line 4i - Schedule of Assets (Held at End of Year)
                                   December 31, 2001

                                                                    Current
     Identity of issuer                    Description               value
----------------------------  ----------------------------------- -----------
  Money market account:
     Federated                Capital Preservation Fund           $ 9,729,922
     Frontier Trust           Contribution Account                    226,229
  Fixed income mutual funds:
*    Performance Funds Trust  Short Term Govt. Inst. Fund           2,359,718
*    Performance Funds Trust  Intermediate Term Govt. Inst. Fund    2,387,754
  Common stock fund:
*    Trustmark Corporation    Common Stock Fund - 5,165,093 units  62,084,423
  Equity mutual funds:
*    Performance Funds Trust  Leader's Equity Fund                    490,571
*    Performance Funds Trust  Large-Cap Equity Fund                10,571,905
*    Performance Funds Trust  Small-Cap Equity Fund                 2,847,935
*    Performance Funds Trust  Mid-Cap Equity Fund                   7,555,686
     Templeton                Foreign Fund                          1,293,934
                                                                  -----------
                                                                  $99,548,077
                                                                  ===========

*    Denotes  related party based on the following  relationships:  Trustmark
     National Bank serves as investment advisor for Performance Funds Trusts;
     Trustmark Corporation is the parent company of Trustmark National Bank.

See accompanying independent auditors' report.

                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


To the Plan Administrator of
Trustmark National Bank 401(k) Plan:

We have audited the  accompanying  statements  of net assets  available for plan
benefits of the  Trustmark  National  Bank 401(k) Plan (the Plan) as of December
31, 2000 and 1999, and the related  statement of changes in net assets available
for  plan  benefits  for the year  ended  December  31,  2000.  These  financial
statements  and the  schedule  referred to below are the  responsibility  of the
Plan's  management.  Our  responsibility  is to  express  an  opinion  on  these
financial statements and schedule based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the 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.  An audit
also includes assessing the accounting principles used and significant estimates
made by  management,  as well as  evaluating  the  overall  financial  statement
presentation.  We believe  that our audits  provide a  reasonable  basis for our
opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects, the net assets available for plan benefits of the Plan as
of December 31, 2000 and 1999,  and the changes in its net assets  available for
plan  benefits  for the  year  ended  December  31,  2000,  in  conformity  with
accounting principles generally accepted in the United States.

Our  audits  were  made for the  purpose  of  forming  an  opinion  on the basic
financial  statements taken as a whole. The supplemental  schedule listed in the
accompanying index is presented for purposes of additional analysis and is not a
required part of the basic financial statements but is supplementary information
required by the  Department of Labor's Rules and  Regulations  for Reporting and
Disclosure  under the  Employee  Retirement  Income  Security  Act of 1974.  The
supplemental  schedule has been subjected to the auditing  procedures applied in
our audits of the basic  financial  statements  and, in our  opinion,  is fairly
stated in all material  respects in relation to the basic  financial  statements
taken as a whole.

/s/  Arthur Andersen LLP
------------------------
     Arthur Andersen LLP

Jackson, Mississippi
June 14, 2001






Pursuant  to  the   requirements  of  the  Securities  Act  of  1934,  the  Plan
Administrator  has duly caused this Annual  Report to be signed on its behalf by
the undersigned thereunto duly authorized.

                              Trustmark National Bank 401(k) Plan
                              Trustmark National Bank, Plan Administrator

                              By: /s/ Louis E. Greer
                                  -------------------
                                  Louis E. Greer
                                  Senior Vice President & Controller

                              June 27, 2002