Certification by the Chief Executive Officer and Chief Financial
               Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant
                to Section 906 of the Sarbanes-Oxley Act of 2002


Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, each of the undersigned officers of Associated
Banc-Corp, a Wisconsin corporation (the "Company"), does hereby certify that:

1. The accompanying Quarterly Report of the Company on Form 10-Q for the
quarter ended September 30, 2004 (the "Report"), fully complies with the
requirements of Section 13(a) of the Securities Exchange Act of 1934; and

2. Information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the Company.

                                                             /s/
                                                       _____________________
                                                       Paul S. Beideman
                                                       Chief Executive Officer
                                                       November 5, 2004


                                                             /s/
                                                       _____________________
                                                       Joseph B. Selner
                                                       Chief Financial Officer
                                                       August 6, 2004