Exhibit 32.1

                           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, 2003 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. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-
Oxley Act of 2002, that to the best of my knowledge:

     (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
- -------------------------------------
R. Richard Bastian, III
President and Chief Executive Officer
November 7, 2003

A signed original of this written statement required by Section 906, or other
document authenticating, acknowledging, or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to Blackhawk Bancorp, Inc. and will
be retained by Blackhawk Bancorp, Inc. and furnished to the Securities and
Exchange Commission or its staff upon request.