Exhibit 32.1

CERTIFICATION

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2003

In connection with the Annual Report of CVB Financial Corp. (the “Company”) on Form 10-K for the fiscal year ended December 31, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Christopher D. Myers, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2003, to the best of my knowledge that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities 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.

/s/  Christopher D. Myers

Christopher D. Myers

Chief Executive Officer

Date: March 1, 2011