UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                  SCHEDULE 13G
                    Under the Securities Exchange Act of 1934
                              (Amendment No. 2004)

                              TRUSTMARK CORPORATION
                                (Name of Issuer)

                                  COMMON STOCK
                         (Title of Class of Securities)

                                    898402102
                                 (CUSIP Number)

                                December 31, 2004
             (Date of Event Which Requires Filing of this Statement)


Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

                               [X] Rule 13d-1(b)
                               [ ] Rule 13d-1(c)
                               [ ] Rule 13d-1(d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).



CUSIP No. 898402102

1.  NAME OF REPORTING PERSON
    I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

    Trustmark National Bank, as trustee 
    64-0180810

2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

    (a) [ ]
    (b) [ ]

3.  SEC USE ONLY

4.  CITIZENSHIP OR PLACE OF ORGANIZATION 

    Organized under the laws of the United States

NUMBER OF              5.   SOLE VOTING POWER           1,512,869
SHARES
BENEFICIALLY           6.   SHARED VOTING POWER           144,073
OWNED BY
EACH                   7.   SOLE DISPOSITIVE POWER      1,512,869
REPORTING
PERSON                 8.   SHARED DISPOSITIVE POWER      144,073
WITH:

9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

    1,656,942

10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES

    [ ]

11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

    2.9%

12. TYPE OF REPORTING PERSON

    BK



CUSIP No. 898402102

Item 1(a) Name of Issuer:

          Trustmark Corporation

Item 1(b) Address of Issuer's Principal Executive Offices:

          248 East Capitol Street
          Jackson, Mississippi 39201

Item 2(a) Name of Person Filing:

          Trustmark National Bank, as trustee

Item 2(b) Address of Principal Business Office:

          248 East Capitol Street
          Jackson, Mississippi 39201

Item 2(c) Citizenship:

          Organized under the laws of the United States

Item 2(d) Title of Class of Securities:

          Common Stock

Item 2(e) CUSIP Number:

          898402102

Item 3    Type of Person:

          (b) Bank [x] Bank as defined in section 3(a)(6) of the Act (15
                       U.S.C. 78c).

Item 4    Ownership:

          (a) Amount beneficially owned: 1,656,942
          (b) Percent of class: 2.9%
          (c) Number of shares as to which the person has:
                  (i)   Sole power to vote or to direct the vote
                        1,512,869

                  (ii)  Shared power to vote or to direct the vote
                        144,073

                  (iii) Sole power to dispose or to direct the disposition of
                        1,512,869

                  (iv)  Shared power to dispose or to direct the disposition of
                        144,073

Item 5    Ownership of Five Percent or Less of a Class:

          N/A


CUSIP No. 898402102

Item 6    Ownership of More than Five Percent on Behalf of Another Person:

          The shares  referred  to in this  Schedule  13G are held by  Trustmark
          National Bank as trustee of various trust accounts. Trustmark National
          Bank does not have the  right to  receive  the  dividends  from  these
          shares or to receive proceeds from the sale of these shares. Trustmark
          National Bank is not aware of any  individual  trust or beneficiary or
          related group of trusts or beneficiaries  who own more than 5% of this
          stock.

Item 7    Identification  and  Classification  of the Subsidiary Which Acquired
          the Security Being Reported on by the Parent Holding Company:

          N/A

Item 8    Identification and Classification of Members of the Group:

          N/A

Item 9    Notice of Dissolution of Group:

          N/A

Item 10   Certification:

          By  signing  below I certify  that,  to the best of my  knowledge  and
          belief, the securities referred to above were acquired and are held in
          the ordinary course of business and were not acquired and are not held
          for the purpose of or with the effect of changing or  influencing  the
          control of the issuer of the  securities and were not acquired and are
          not held in  connection  with or as a participant  in any  transaction
          having that purpose or effect.

Signature:

After  reasonable  inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date:           February 14, 2005

Signature:      /s/ Louis E. Greer
                ------------------

Name and Title: Louis E. Greer
                Senior Vice President
                And Chief Accounting Officer