Exhibit 32.2

Certification

Pursuant to the requirement set forth in Section 906 of the Sarbanes-Oxley Act of 2002, David E. Hooston hereby certifies as follows:

1. He is the duly appointed Chief Financial Officer of Placer Sierra Bancshares, a California corporation (the “Company”).

2. Based on his knowledge, the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2006, and to which this Certification is attached as Exhibit 32.2 (the “Periodic Report”), fully complies with the requirements of section 13(a) or section 15(d), of the Securities Exchange Act of 1934 and that the information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

IN WITNESS WHEREOF, the undersigned has set his hand hereto as of this 8th day of August 2006.

	PLACER SIERRA BANCSHARES
Dated: August 8, 2006	/S/    DAVID E. HOOSTON
	David E. Hooston Chief Financial Officer