Exhibit 99-a

                                CERTIFICATION BY
                             CHIEF EXECUTIVE OFFICER
                     TRUSTMARK CORPORATION AND SUBSIDIARIES
                         PURSUANT TO 18 U.S.C. ss. 1350


I,  Richard G.  Hickson,  Chairman  of the Board,  President  & Chief  Executive
Officer of Trustmark  Corporation and Subsidiaries  (Trustmark),  hereby certify
that the  accompanying  report  on Form  10-K  (Report)  for the  period  ending
December 31, 2002, and filed with the Securities and Exchange  Commission on the
date hereof pursuant to Section 13(a) of the Securities  Exchange Act of 1934 by
Trustmark, fully complies with the requirements of that section.

I further certify that the information  contained in the Report fairly presents,
in all material  aspects,  the financial  condition and results of operations of
Trustmark.



BY:      /s/ Richard G. Hickson
         ----------------------
         Richard G. Hickson
         Chairman of the Board, President
         & Chief Executive Officer

DATE:    March 21, 2003





                                                                    Exhibit 99-b

                                CERTIFICATION BY
                             CHIEF EXECUTIVE OFFICER
                     TRUSTMARK CORPORATION AND SUBSIDIARIES
                                   PURSUANT TO
                               SECTION 302 OF THE
                           SARBANES-OXLEY ACT OF 2002


I, Richard G. Hickson, certify that:

     1)   I  have  reviewed  this  annual  report  on  Form  10-K  of  Trustmark
          Corporation and Subsidiaries;

     2)   Based on my knowledge,  this annual report does not contain any untrue
          statement  of a  material  fact  or  omit to  state  a  material  fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this annual report;

     3)   Based on my knowledge,  the financial statements,  and other financial
          information  included in this  annual  report,  fairly  present in all
          material respects the financial  condition,  results of operations and
          cash flows of the registrant as of, and for, the periods  presented in
          this annual report;

     4)   The registrant's  other  certifying  officer and I are responsible for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined in Exchange  Act Rules  13a-14 and 15d-14) for the  registrant
          and we have:
          a.   designed such  disclosure  controls and procedures to ensure that
               material  information  relating to the registrant,  including its
               consolidated  subsidiaries,  is made known to us by others within
               those  entities,  particularly  during  the  period in which this
               annual report is being prepared;
          b.   evaluated  the  effectiveness  of  the  registrant's   disclosure
               controls and  procedures as of a date within 90 days prior to the
               filing date of this annual report (the "Evaluation Date"); and
          c.   presented  in  this  annual  report  our  conclusions  about  the
               effectiveness of the disclosure  controls and procedures based on
               our evaluation as of the Evaluation Date;

     5)   The registrant's other certifying officer and I have disclosed,  based
          on our most recent  evaluation,  to the registrant's  auditors and the
          audit  committee  of  registrant's  board  of  directors  (or  persons
          performing the equivalent function):
          a.   all  significant  deficiencies  in the  design  or  operation  of
               internal  controls which could adversely  affect the registrant's
               ability to record,  process,  summarize and report financial data
               and have  identified for the  registrant's  auditors any material
               weaknesses in internal controls; and
          b.   any fraud,  whether or not material,  that involves management or
               other employees who have a significant  role in the  registrant's
               internal controls; and

     6)   The registrant's other certifying officer and I have indicated in this
          annual  report  whether  there were  significant  changes in  internal
          controls or in other factors that could significantly  affect internal
          controls  subsequent  to the  date  of  our  most  recent  evaluation,
          including   any   corrective   actions  with  regard  to   significant
          deficiencies and material weaknesses.

BY:    /s/ Richard G. Hickson
       ----------------------
       Richard G. Hickson
       Chairman of the Board, President
       & Chief Executive Officer

DATE:  March 21, 2003



                                                                    Exhibit 99-c

                                CERTIFICATION BY
                             CHIEF FINANCIAL OFFICER
                     TRUSTMARK CORPORATION AND SUBSIDIARIES
                         PURSUANT TO 18 U.S.C. ss. 1350


I, Zach L. Wasson, Treasurer of Trustmark,  hereby certify that the accompanying
report on Form 10-K (Report) for the period ending  December 31, 2002, and filed
with the  Securities  and  Exchange  Commission  on the date hereof  pursuant to
Section  13(a)  of the  Securities  Exchange  Act of  1934 by  Trustmark,  fully
complies with the requirements of that section.

I further certify that the information  contained in the Report fairly presents,
in all material  aspects,  the financial  condition and results of operations of
Trustmark.



BY:      /s/ Zach L. Wasson
         ---------------------
         Zach L. Wasson
         Treasurer (Principal
         Financial Officer)

DATE:    March 21, 2003










                                                                    Exhibit 99-d

                                CERTIFICATION BY
                             CHIEF FINANCIAL OFFICER
                     TRUSTMARK CORPORATION AND SUBSIDIARIES
                                   PURSUANT TO
                               SECTION 302 OF THE
                           SARBANES-OXLEY ACT OF 2002


I, Zach L. Wasson, certify that:

     1)   I  have  reviewed  this  annual  report  on  Form  10-K  of  Trustmark
          Corporation and Subsidiaries;

     2)   Based on my knowledge,  this annual report does not contain any untrue
          statement  of a  material  fact  or  omit to  state  a  material  fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this annual report;

     3)   Based on my knowledge,  the financial statements,  and other financial
          information  included in this  annual  report,  fairly  present in all
          material respects the financial  condition,  results of operations and
          cash flows of the registrant as of, and for, the periods  presented in
          this annual report;

     4)   The registrant's  other  certifying  officer and I are responsible for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined in Exchange  Act Rules  13a-14 and 15d-14) for the  registrant
          and we have:

          a.   designed such  disclosure  controls and procedures to ensure that
               material  information  relating to the registrant,  including its
               consolidated  subsidiaries,  is made known to us by others within
               those  entities,  particularly  during  the  period in which this
               annual report is being prepared;

          b.   evaluated  the  effectiveness  of  the  registrant's   disclosure
               controls and  procedures as of a date within 90 days prior to the
               filing date of this annual report (the "Evaluation Date"); and

          c.   presented  in  this  annual  report  our  conclusions  about  the
               effectiveness of the disclosure  controls and procedures based on
               our evaluation as of the Evaluation Date;

     5)   The registrant's other certifying officer and I have disclosed,  based
          on our most recent  evaluation,  to the registrant's  auditors and the
          audit  committee  of  registrant's  board  of  directors  (or  persons
          performing the equivalent function):

          a.   all  significant  deficiencies  in the  design  or  operation  of
               internal  controls which could adversely  affect the registrant's
               ability to record,  process,  summarize and report financial data
               and have  identified for the  registrant's  auditors any material
               weaknesses in internal controls; and

          b.   any fraud,  whether or not material,  that involves management or
               other employees who have a significant  role in the  registrant's
               internal controls; and

     6)   The registrant's other certifying officer and I have indicated in this
          annual  report  whether  there were  significant  changes in  internal
          controls or in other factors that could significantly  affect internal
          controls  subsequent  to the  date  of  our  most  recent  evaluation,
          including   any   corrective   actions  with  regard  to   significant
          deficiencies and material weaknesses.


BY:    /s/ Zach L. Wasson
       ------------------
       Zach L. Wasson
       Treasurer (Principal
       Financial Officer)

DATE:  March 21, 2003