EXHIBIT 99.1

FROM:  Blackhawk Bancorp, Inc.
       400 Broad Street, Beloit, WI 53511

                             FOR IMMEDIATE RELEASE

Contact:    Todd J. James - Executive Vice President and CFO
Phone:      608-364-8911
Fax:        608-363-6186

                        BLACKHAWK BANCORP, INC. REPORTS
                          SECOND QUARTER 2003 RESULTS

     Beloit, WI August 8, 2003 - Blackhawk Bancorp, Inc. reported net income  of
$330,000 for the  second quarter  of 2003 compared  to $430,000  for the  second
quarter of 2002. Diluted earnings per share were $0.13 for the second quarter of
2003 compared to $0.17 per share in the second quarter of 2002.

     R. Richard  Bastian,  III,  the company's  President  and  Chief  Executive
Officer, said  "The  delayed  economic  recovery  in  our  primary  markets  has
negatively impacted business and consumer loan  demand, while at the same  time,
45-year lows in interest rates continued to fuel the mortgage refinancing  boom.
We've benefited  from  the  refinancing  boom  with  mortgage  banking  revenues
increasing 161.1 percent over the second quarter of 2002, however, net  interest
income has suffered due to prepayments on the bank's portfolio of mortgage loans
and mortgage-backed securities." "We're  disappointed in the financial  results,
but believe our progress in improving credit culture, re-designing processes and
providing better  training to  employees  has positioned  the  bank to  be  more
competitive as the economic environment improves" commented Bastian.

     Bastian also reported that the requisite regulatory approvals to close  the
pending acquisition of DunC  Corp. and its subsidiary  First Bank, bc have  been
obtained. "Based on our  extensive review of  product design and  profitability,
overhead expenses, staffing  levels and  facilities utilization  related to  the
merger combined with signs that the economy is beginning to recover,  we  expect
better results in the second half of the year and into 2004." added Bastian.

     Net interest income for the second quarter 2003 decreased 11.9 percent,  or
$319,000, to $2,362,000. Net interest margin  decreased to 3.22 percent for  the
second quarter of 2003 compared to 3.81 percent for the same period in 2002  and
3.67 percent for the fourth quarter of 2002.  Net interest income was  adversely
affected by  the continued  shift in  earning assets  from loans  to  investment
securities as a result  of the high  level of refinance  activity in 1-4  family
residential real estate loans.  High prepayment speeds also decreased the  yield
on mortgage-backed securities held in the company's investment portfolio.

     The average balance of loans decreased by $13.1 million, or 6.7 percent  to
$183.0 million for  the second  quarter of 2003  compared to  $196.1 million  in
2002.  Of the $13.1 million decrease $9.9 million was in 1-4 family  residential
loans and $5.5  million was in  consumer and indirect  automobile loans.     The
decreases in both of  these categories reflect the  refinancing activity due  to
interest rates reaching  45-year lows,  as consumers  re-finance their  existing
mortgages and use equity in their homes to consolidate other debt into secondary
market loan products.

     The average balance  of investment securities  increased $34.5 million,  or
37.5 percent, to $126.4 million for the second quarter of 2003 compared to $91.9
million in 2002,  reflecting the investment  of proceeds from  decreases in  the
loan portfolio and short-term investments and an increase in deposits.

     Total average deposits increased by $11.3 million, or 4.7 percent to $250.3
million for the second quarter of 2003 compared to $239.0 million for the second
quarter of  2002.   Of the  $11.3  million increase  in average  deposits,  $5.8
million was in interest bearing checking accounts, which increased 17.7  percent
to $39.0 million compared to  $33.2 million for the  second quarter of 2002  and
$2.2 million was in  non-interest bearing demand  deposits, which increased  7.3
percent to $32.5  million compared to  $30.3 million for  the second quarter  of
2002.

     The provision for loan losses of  $142,000 for the quarter was $20,000,  or
16.4 percent  higher than  the 2002  second quarter  provision. Net  charge-offs
decreased by $123,000 to net recoveries of $3,000 for the second quarter of 2003
compared to net  charge-offs of  $120,000 for the  second quarter  of 2002.  The
ratio of the allowance to total loans increased  to 1.26 percent as of June  30,
2003 compared to 1.10 percent at December 31, 2002.

     Non-interest income for the  second quarter of  2003 increased $10,000,  or
1.1 percent to  $880,000 compared to  $870,000 for the  second quarter of  2002.
Gain on sale of 1-4 family  mortgage loans increased $87,000, or 161.1  percent,
reflecting the  increased refinance  activity due  to 45-year  lows in  interest
rates.  Other non-interest  income includes an increase  of $67,000 in the  cash
surrender value  of  life  insurance  due  to  the  Bank's  September  30,  2002
investment in  Bank Owned  Life Insurance.   These  increases were  offset by  a
$130,000 decrease  in  securities gains  to  $95,000 compared  to  the  $225,000
recognized in the second quarter of 2002.

     Total operating expense for the second quarter decreased by $70,000, or 2.5
percent, to $2,769,000 compared to $2,839,000 a year ago.

     Blackhawk Bancorp,  Inc. is  the parent  company of  Blackhawk State  Bank,
which operates  nine  office locations  in  south central  Wisconsin  and  north
central Illinois.  The  stock of Blackhawk Bancorp,  Inc. is publicly traded  on
the Over the Counter Market under the symbol BKHB.

     When used in this communication, the words "believes," "expects," and
similar expressions are intended to identify forward-looking statements. The
Company's actual results may differ materially from those described in the
forward-looking statements. Factors which could cause such a variance to occur
include, but are not limited to: heightened competition; adverse state and
federal regulation; failure to obtain new or retain existing customers; ability
to attract and retain key executives and personnel; changes in interest rates;
unanticipated changes in industry trends; unanticipated changes in credit
quality and risk factors, including general economic conditions; success in
gaining regulatory approvals when required; changes in the Federal Reserve Board
monetary policies; unexpected outcomes of new and existing litigation in which
Blackhawk or its subsidiaries, officers, directors or employees is named
defendants; technological changes; changes in accounting principles generally
accepted in the United States; changes in assumptions or conditions affecting
the application of "critical accounting policies"; and the inability of third
party vendors to perform critical services for the company or its customers.