Exhibit 32.2 PACIFIC STATE BANCORP CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Quarterly Report of Pacific State Bancorp (the "Company") on Form 10-Q for the period ended September 30, 2006, as filed with the Securities and Exchange Commission on the date hereof (the "Report'), the undersigned hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of her knowledge, that: (1) The Report fully complies with the requirements and Exchange Act of 1934; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company Date: November 14, 2006 /s/ JOANNE ROBERTS -------------------------------- JoAnne Roberts Senior Vice President and Chief Financial Officer 34