CFS Bancorp (CITZ) 11-K Annual report of employee stock purchases

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement of CFS Bancorp, Inc. on Form S-8 (file Number 333-62053) of our report dated June 25, 2008, on the financial statements of Citizens Financial Services, FSB Employees’ Savings & Profit Sharing Plan and Trust for the year ended December 31, 2007, which report is included in its Annual Report on Form 11-K.

/ s / BKD, LLP

Merrillville, Indiana

June 25, 2008