Citizens Republic Bancorp (CTZ+A) 10-Q 2006 Q2 Quarterly report

EXHIBIT 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350
AND RULE 13A-14(B) UNDER THE SECURITIES EXCHANGE ACT OF 1934

In connection with the Quarterly Report of Citizens Banking Corporation (“Citizens”) on Form 10-Q for the period ending June 30, 2006 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, William R. Hartman, Chief Executive Officer of Citizens, and Charles D. Christy, Chief Financial Officer of Citizens, certify, pursuant to 18 U.S.C. Section 1350 and Rule 13a-14(b) under the Securities Exchange At of 1934, that:

(1)	The Report fully complies with the requirements of Section 13(a) 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 Citizens.

Date: August 4, 2006

/s/ William R. Hartman  

William R. Hartman 

Chief Executive Officer 

/s/ Charles D. Christy  

Charles D. Christy 

Chief Financial Officer