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


                                December 9, 2003
                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
On December 9, 2003,  Trustmark  Corporation  (NASDAQ:TRMK)  and Allied  Houston
Bank, Houston,  Texas, announced the signing of a definitive Branch Purchase and
Assumption Agreement pursuant to which Trustmark National Bank will acquire five
branches of Allied  Houston  Bank serving the greater  Houston  market for a $10
million deposit premium.

The  Agreement  contemplates  the  assumption  of selected  deposit  accounts of
approximately   $160  million,   the  purchase  of  selected  loan  accounts  of
approximately  $158 million and the operation of five Allied Houston Bank branch
locations.  At November 30, 2003, Allied Houston Bank deposits and loans totaled
approximately  $198  million  and  $178  million,   respectively.  The  proposed
transaction,  which is subject to approval by regulatory  authorities and Allied
Houston shareholders, is expected to close during the first quarter of 2004.

Richard G. Hickson, Chairman and CEO of Trustmark,  stated, "We are delighted to
expand the Trustmark  franchise into the dynamic Houston market.  The associates
of Allied  Houston  Bank share our  dedication  to providing  superior  customer
satisfaction.  The  customers  of these  branches and the  demographics  of this
market  represent an outstanding  opportunity for Trustmark.  We look forward to
growing our franchise in this most desirable market."

George  R.  Farish,  Chairman  of Allied  Houston  Bank,  commented,  "This is a
significant transaction for Allied Houston Bank and our shareholders.  Trustmark
will be gaining five excellent branch locations with outstanding employees and a
solid customer base."

In order to facilitate  its entry into Texas,  Trustmark has signed a definitive
agreement  to acquire an existing  Texas state bank  charter  from an  unrelated
party.  The merger of the Texas state bank charter into Trustmark  National Bank
will provide  Trustmark  the  authority to conduct  business  throughout  Texas.
Trustmark  will not be  acquiring  any loans or  deposits as part of the charter
acquisition,  which  is  subject  to  regulatory  approval  and  expected  to be
completed early in the first quarter of 2004.

Trustmark  is a financial  services  company  providing  banking  and  financial
solutions  through  over  140  offices  and  2,350  associates  in  Mississippi,
Tennessee and Florida. For additional information, visit Trustmark's web site at
www.trustmark.com

Forward Looking Statements by Trustmark  Corporation
This press release contains forward-looking statements within the meaning of and
pursuant to the safe harbor  provisions  of the  Private  Securities  Litigation
Reform  Act  of  1995.  A  forward-looking   statement  in  this  press  release
encompasses  any  estimate,  prediction,   expectation,   projection,   opinion,
anticipation,  outlook or statement of belief included  therein,  as well as the
management assumptions underlying those forward-looking statements. Factors that
might cause future  results to differ from such  forward-looking  statements are
described in Trustmark's  filings with the  Securities and Exchange  Commission.
Trustmark  undertakes no obligation to update or revise any of this information,
whether as the result of new  information,  future  events or  developments,  or
otherwise.

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



                                   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:     December 9, 2003