EXHIBIT 31.1

                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER

               Under Section 302 of the Sarbanes-Oxley Act of 2002

   Regarding Quarterly Report on Form 10-Q for the Quarter Ended June 30, 2007

I, Steven A. Rosso, certify that:

1.     I have  reviewed  this  quarterly  report on Form 10-Q of  Pacific  State
       Bancorp.

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 periods 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  Company's  other  reporting   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)) 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)     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 upon such evaluation; and

       c)     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.

5.     The Company's other reporting officer and 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 data; 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.

Dated: August 14, 2007

/s/ Steven A. Rosso
--------------------------
President and Chief
Executive Officer