SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, DC  20549

                                   FORM 8-K

                                CURRENT REPORT

                      Pursuant to Section 13 or 15(d) of
                     the Securities Exchange Act of 1934

   Date of Report (Date of earliest event reported)         August 28, 2002

                            BLACKHAWK BANCORP, INC.
                            -----------------------

             (Exact name of registrant as specified in its charter)


         Wisconsin                      0-18599                 39-1659424
----------------------------   ------------------------         ----------
(State or other jurisdiction   (Commission File Number)   (IRS Employer Number)
of incorporation)

          400 Broad Street, Beloit, WI                        53511
          ----------------------------                        -----
          (Address of principal executive offices)          (Zip Code)

Registrant's telephone number, including area code:  (608) 364-8911
                                                     --------------

Item 4.     Changes in Registrant's Certifying Accountant

On August 27, 2002, the Audit Committee  of the Board of Directors of  Blackhawk
Bancorp, Inc.  ("the Company")  approved  a change  in  auditors. The  Board  of
Directors ratified the Audit Committee's engagement  of McGladrey & Pullen,  LLP
to serve  as the  Company's independent  public accountants  and replacement  of
Wipfli Ullrich  Bertelson  LLP (Wipfli")  as  the Company's  independent  public
accountants, effective August 28, 2002.

Wipfli performed audits  of the consolidated  financial statements  for the  two
years ended December 31, 2001 and 2000. Their reports did not contain an adverse
opinion or a  disclaimer of opinion  and were not  qualified or  modified as  to
uncertainty, audit scope, or accounting principles.

During the two years ended December 31, 2001, and from December 31, 2001 through
the effective date of the Wipfli  termination, there have been no  disagreements
between the Registrant  and Wipfli  on any  matter of  accounting principles  or
practice, financial statement disclosure, or auditing scope or procedure,  which
disagreements would have caused Wipfli to  make reference to the subject  matter
of such disagreements in connection with this report.

During the two years ended December 31,  2001, and from December 31, 2001  until
the effective  date  of the  dismissal  of Wipfli,  Wipfli  did not  advise  the
Registrant of any of the following matters:

1.   That the internal controls necessary for the Registrant to develop reliable
     financial statements did not exist;

2.   That information had  come to  Wipfli's attention that  had lead  it to  no
     longer be able to rely on management's representations, or that had made it
     unwilling to  be  associated  with the  financial  statements  prepared  by
     management;

3.   That there was a need to expand significantly the scope of the audit of the
     Registrant, or  that information  had come  to Wipfli's  attention that  if
     further investigated: (i) may materially impact the fairness or reliability
     of  either  a  previously-issued  audit  report  or  underlying   financial
     statements, or the financial statements issued or to be issued covering the
     fiscal periods  subsequent  to  the  date  of  the  most  recent  financial
     statements covered  by  an audit  report  (including information  that  may
     prevent it from rendering  an unqualified audit  report on those  financial
     statements) or (ii) may  cause it to be  unwilling to rely on  management's
     representation or be associated with the Registrant's financial  statements
     and that, due to its dismissal, Wipfli did  not so expand the scope of  its
     audit or conduct such further investigation;

4.   That information  had come  to Wipfli's  attention  that it  had  concluded
     materially  impacted  the  fairness  or   reliability  of  either:  (i)   a
     previously-issued audit report  or the underlying  financial statements  or
     (ii) the financial statements  issued or to be  issued covering the  fiscal
     period subsequent  to the  date of  the  most recent  financial  statements
     covered by an audit report (including information that, unless resolved  to
     the  accountant's  satisfaction,  would   prevent  it  from  rendering   an
     unqualified audit report on  those financial statements),  or that, due  to
     its dismissal, there were no such unresolved  issues as of the date of  its
     dismissal.

Wipfli has furnished a letter to the SEC dated August 29, 2002, stating that  it
agrees with the above statements, and is attached hereto as Exhibit 1.

During the two years ended December 31, 2001, and from December 31, 2001 through
engagement  of  McGladrey  &  Pullen,   LLP  as  the  Registrant's   independent
accountant, neither  the  Registrant nor  anyone  on its  behalf  had  consulted
McGladrey &  Pullen, LLP  with  respect to  any  accounting or  auditing  issues
involving the  Registrant.  In particular,  there  was no  discussion  with  the
Registrant regarding the  application of  accounting principles  to a  specified
transaction, the type of audit opinion  that might be rendered on the  financial
statements, or any related item.

Item 7.     Financial Statements and Exhibits

(C)  EXHIBITS.

     16.1   Letter from Wipfli Ullrich Bertelson LLP dated August 29, 2002.

     99     Press Release dated August 29, 2002.

                                   SIGNATURES

Pursuant to  the  requirements of  the  Securities  Exchange Act  of  1934,  the
registrant has  duly caused  this report  to  be signed  on  its behalf  by  the
undersigned thereunto duly authorized.

Date:  August 29, 2002                       BLACKHAWK BANCORP, INC.

                                             /s/Todd J. James
                                             -----------------------------------

                                             Todd J. James
                                             Senior Vice President and CFO

                          EXHIBIT INDEX TO FORM 8-K OF
                            BLACKHAWK BANCORP, INC.
                             DATED AUGUST 28, 2002
                  Pursuant to Section 102(d) of Regulation S-T

EXHIBIT   DESCRIPTION

16.1      Letter to Securities and Exchange Commission dated August 29, 2002
          from Wipfli Ullrich Bertelson LLP.

99        Press Release dated August 29, 2002.