EXHIBIT 99.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


         Pursuant to Section 1350, Chapter 63 of Title 18, United States Code,
as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the
undersigned, as Chief Executive Officer of Southwest Bancorporation of Texas,
Inc. (the "Company"), does hereby certify that:

         1) the Company's Quarterly Report on Form 10-Q for the quarter ended
September 30, 2002 (the "Report"), fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

         2) the information contained in the Company's Report fairly presents,
in all material respects, the financial condition and results of operations of
the Company.

  Dated November 5, 2002
                             /s/ Paul B. Murphy, Jr.
                             --------------------------------
                             Paul B. Murphy, Jr.
                             Director, President and Chief Executive Officer