Exhibit 32.1


                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                 SECTION 906 OF TEHE SARBANES-OXLEY ACT OF 2002


I, John Terwilliger, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual
Report of Houston American Energy Corp. on Form 10-KSB for the year ended
December 31, 2006 fully complies with the requirements of Section 13(a) or 15(d)
of the Securities Exchange Act of 1934 and that information contained in such
Form 10-KSB fairly presents in all material respects the financial condition and
results of operations of Houston American Energy Corp.


                                   By:    /s/ John Terwilliger
                                          --------------------------
                                   Name:  John Terwilliger
                                   Title: Chief Executive Officer
                                   Dated: March 29, 2007