EXHIBIT 99

                           CERTIFICATION PURSUANT TO
                            18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                 SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Quarterly Report of Blackhawk Bancorp, Inc. (the
"Company") on Form 10-QSB for the period ended September 30, 2002 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I, R.
Richard Bastian, III, Chief Executive Officer of the Company, certify, pursuant
to 18 U.S.C. Section1350, as adopted pursuant to Section906 of the Sarbanes-
Oxley Act of 2002, 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/ R. Richard Bastian, III
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R. Richard Bastian, III
President and Chief Executive Officer
November 12,  2002

                           CERTIFICATION PURSUANT TO
                            18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                 SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Quarterly Report of Blackhawk Bancorp, Inc. (the
"Company") on Form 10-QSB for the period ended September 30, 2002 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Todd J. James, Chief Financial Officer of the Company, certify, pursuant to 18
U.S.C. Section1350, as adopted pursuant to Section906 of the Sarbanes-Oxley Act
of 2002, 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/ Todd J. James
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Todd J. James
Senior Vice President and CFO
November 12, 2002