William A Brown Form 4 TRUSTMARK / William A Brown ownership change

SECTION 16

POWER OF ATTORNEY





 I, William A. Brown, do hereby constitute and appoint Granville

Tate, Jr. and F.

Joseph Rein, Jr., or either of them, as my true and lawful attorney-in-

fact, acting singly and

with full power of substitution, to do any and all acts and things and

execute and file any

and all instruments for me and in my name and on my behalf as a director,

officer and/or

shareholder of TRUSTMARK CORPORATION (the "Company") which said

attorneys, or

either of them, may deem necessary or advisable to enable me to comply

with my

obligations under Section 16(a) of the Securities Exchange Act of 1934

and the rules and

regulations of the SEC thereunder (collectively, "Section 16(a)"),

including, without

limitation, authority to (i) prepare, execute in my name and on my

behalf, and submit to the

U.S. Securities and Exchange Commission (the "SEC") a Form ID, including

any necessary

amendments thereto, and any other documents necessary or appropriate to

obtain codes and

passwords enabling me to make electronic filings with the SEC of reports

required by

Section 16(a), (ii) prepare, execute and file any and all reports or

statements of beneficial

ownership or changes in beneficial ownership of securities of the Company

that the

undersigned (in the undersigned's individual capacity or in any other

capacity) may be

required to file pursuant to Section 16(a), including any report or

statement on Form 3,

Form 4 or Form 5, or any amendment to any such report or statement; (iii)

prepare, execute

and file any report or notice required under Rule 144 under the

Securities Act of 1933, or

any amendment thereto, and (iv) prepare, execute and file any and all

other forms,

instruments or documents, including any necessary amendments thereto, as

such attorneys

or attorney otherwise deems necessary or advisable to enable me to comply

with Section

16(a).



 I do hereby ratify and confirm all acts my said attorney shall do

or cause to be

done by virtue hereof.  I acknowledge that the foregoing attorneys-in-

fact, serving in such

capacity at my request, is not assuming, nor is the Company assuming, any

of my

responsibilities to comply with Section 16(a).



 This power of attorney shall remain in full force and effect until

it is revoked by

the undersigned in a signed writing delivered to said attorney-in-fact or

the undersigned is

no longer required to comply with Section 16(a), whichever occurs first.



 WITNESS the execution hereof this 12th day of December, 2017.



  Trustmark Corporation





  /s/ William A. Brown

  William A. Brown