EXHIBIT 31.1

                                 CERTIFICATION
                          PRINCIPAL EXECUTIVE OFFICER
                                      AND
                          PRINCIPAL FINANCIAL OFFICER


       I, J. Scott Zimmerman, certify that:

1.                                        I have reviewed this Quarterly Report
       on Form 10-Q of South Texas Oil Company;

2.                                       Based  on  my  knowledge,  this 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 report;

3.                                        Based  on my knowledge, the financial
       statements, and other financial information  included  in  this  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 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-15(e) and  15d-15(e))  and  internal  control  over  financial
       reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for
       the registrant and have:

       a)                                         Designed    such   disclosure
             controls  and procedures, or caused such disclosure  controls  and
             procedures  to  be  designed under our supervision, 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
             report is being prepared;

       b)                                      Designed such  internal  control
             over financial reporting, or caused  such  internal  control  over
             financial  reporting  to  be  designed  under  our supervision, to
             provide   reasonable   assurance  regarding  the  reliability   of
             financial reporting and  the  preparation  of financial statements
             for  external  purposes  in  accordance  with  generally  accepted
             accounting principles;

       c)                                      Evaluated the  effectiveness  of
             the  registrant's disclosure controls and procedures and presented
             in this  report  our  conclusions  about  the effectiveness of the
             disclosure controls and procedures, as of the  end  of  the period
             covered by this report based on such evaluation; and

       d)                                      Disclosed  in  this  report  any
             change   in  the  registrant's  internal  control  over  financial
             reporting that occurred during the registrant's most recent fiscal
             quarter (the  registrant's fourth fiscal quarter in the case of an
             annual report)  that  has  materially  affected,  or is reasonably
             likely  to  materially  affect, the registrant's internal  control
             over financial reporting; and

5.                                        I  have  disclosed, based on our most
       recent evaluation of internal control over financial  reporting,  to the
       registrant's  auditors and the audit committee of the registrant's board
       of directors (or persons performing the equivalent functions):

       a)                                      All significant deficiencies and
             material weaknesses in the design or operation of internal control
             over financial  reporting which are reasonably likely to adversely
             affect the registrant's  ability to record, process, summarize and
             report financial information; and

       b)                                       Any   fraud,   whether  or  not
             material, that involves management or other employees  who  have a
             significant   role  in  the  registrant's  internal  control  over
             financial reporting.



Date: May 20, 2008	/s/ J. Scott Zimmerman
			----------------------
                 	J. Scott Zimmerman
                 	Chief Executive Officer
                 	(Principal Executive Officer and
			 Principal Financial Officer)