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


                                  June 2, 2004
                Date of Report (Date of earliest event reported)


                              TRUSTMARK CORPORATION
             (Exact name of registrant as specified in its charter)


   Mississippi                        0-3683                     64-0471500
(State or other              (Commission File Number)          (IRS Employer
jurisdiction of                                              Identification No.)
 incorporation)



                             248 East Capitol Street
                                Jackson, MS 39201
          (Address, including zip code, of principal executive office)


                                 (601) 208-5111
              (Registrant's telephone number, including area code)




Item 5. Other Events and Regulation FD Disclosure

During the first quarter of 2004,  Trustmark realigned its management  reporting
structure to include the following segments: general banking, wealth management,
insurance  and  administration  to better  reflect  the  manner in which  senior
management  reviews  operating  results in  allocating  resources  and assessing
performance. As a result of these modifications,  Trustmark has recast Note 18 -
Segment  Information,  to its  Consolidated  Financial  Statements for the years
ended December 31, 2003, 2002 and 2001,  which were  previously  included in the
2003 Annual Report and furnished to the SEC as Exhibit 13 to Trustmark's  Annual
Report on Form 10-K for the year ended December 31, 2003, to reflect the revised
segment data for the years ended  December  31,  2003,  2002 and 2001. A copy of
Trustmark's  recast  Consolidated  Financial  Statements  for  the  years  ended
December  31,  2003,  2002 and 2001 and the  accompanying  report  of KPMG  LLP,
independent auditors to Trustmark Corporation, thereon, dated February 14, 2004,
except as to the first two paragraphs of Note 7 and Note 18, which are as of May
26, 2004, are filed as an exhibit to this Current Report on Form 8-K.

The general banking segment realigns  Trustmark's former consumer and commercial
segment  into a single group that  delivers a full range of banking  services to
consumers,  corporate,  small and middle market businesses through its extensive
branch  network.  Trustmark  realigned  its former  investment  segment into the
wealth management segment incorporating trust,  brokerage,  investment advisory,
and private banking service under one umbrella. The insurance segment,  formerly
included in the consumer segment, represents Trustmark's retail insurance agency
that offers a diverse mix of insurance products and services. The administrative
segment incorporates  Trustmark's  treasury function with various  non-allocated
corporate   operation   units  and  includes   intangible   assets  and  related
amortization  (except for mortgage  servicing  rights and related  amortization,
which is included in the general banking segment).

Trustmark  is a financial  services  company  providing  banking  and  financial
solutions through over 145 offices and 2,400 associates in Mississippi, Florida,
Tennessee and Texas.

Trustmark's  investor  contacts are Zach Wasson,  Executive  Vice  President and
Chief Financial  Officer  (601-208-6816),  and Joseph Rein, First Vice President
(601-208-6898). Trustmark's media contact is Gray Wiggers, Senior Vice President
(601-208-5942).

(c) The following exhibits are filed as part of this Form 8-K.

    Exhibit No.    Description
    -----------    -----------
         23        Consent of Independent Registered Public Accounting Firm

         99        Consolidated Financial Statements, including Notes, of
                   Trustmark Corporation as of and for the year ended
                   December 31, 2003, and report of KPMG LLP, independent
                   auditors to Trustmark Corporation, thereon, dated
                   February 14, 2004, except as to the first two paragraphs
                   of Note 7 and Note 18, which are as of May 26, 2004.




                                   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 hereunto duly authorized.

                              TRUSTMARK CORPORATION


BY:       /s/ Louis E. Greer
          ------------------
          Louis E. Greer
          Chief Accounting Officer

DATE:     June 2, 2004




                                  EXHIBIT INDEX

23       Consent of Registered Independent Public Accounting Firm

99       Consolidated Financial Statements, including Notes, of Trustmark
         Corporation as of and for the year ended December 31, 2003, and
         report of KPMG LLP, independent auditors to Trustmark Corporation,
         thereon, dated February 14, 2004, except as to the first two
         paragraphs of Note 7 and Note 18, which are as of May 26, 2004