OLD SECOND BANCORP INC
10-K, 1998-03-30
STATE COMMERCIAL BANKS
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                  SECURITIES AND EXCHANGE COMMISSION
                        Washington, D.C.  20549
                                   
                               FORM 10-K
(Mark One)
     X       Annual Report Pursuant to Section 13 or 15(d)
                    of the Securities Exchange Act
                        of 1934 (No Fee Required)
              For the fiscal year ended December 31, 1997
                                   or
            Transition Report Pursuant to Section 13 or 15(d)
                    of the Securities Exchange Act
                       of 1934 (No Fee Required)
       For the Transition Period From __________ to __________.

                   Commission file number 0-10537                     
                                   
                        Old Second Bancorp, Inc.
        (Exact name of Registrant as specified in its charter)

               Delaware                         36-3143493
        (State of Incorporation)          (I.R.S. Employer I.D. No.)

            37 South River Street, Aurora, Illinois  60507
          (Address of principal executive offices) (Zip Code)

                            (630) 892-0202
         (Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act: None
Securities registered pursuant to Section 12(g) of the Act: Yes

Indicate by check mark whether the Registrant (1) has filed all reports 
required to be filed by Section 13 or 15(d) of the Securities Exchange Act 
of 1934 during the preceding 12 months (or for such shorter period that the 
Registrant was required to file such reports), and (2) has been subject to 
such filing requirements for the past 90 days.

                         Yes   X   No       

Indicate by check mark if disclosure of delinquent filers pursuant to Item 
405 of Regulation S-K is not contained herein, and will not be contained, to 
the best of Registrant's knowledge, in definitive proxy or information 
statements incorporated by reference in Part III of this Form 10-K or any 
amendment to this Form 10-K.

                         Yes    X    No      

State the aggregate market value of the voting stock held by non-affiliates 
of the Registrant.  The aggregate market value shall be computed by reference 
to the price at which the stock was sold, or the average bid and asked prices
of such stock, as of a specified date within 60 days prior to the date of 
filing:

                       $189,049,780 as of March 12, 1998

Indicate the number of shares outstanding of each of the registrant's  classes
of common stock, as of the latest practicable date.

3,049,190 shares of No par value common stock at March 12, 1998.

                  DOCUMENTS INCORPORATED BY REFERENCE

Portions of the December 31, 1997 Annual Report to Stockholders and the 
Registrant's Proxy Statement dated February 11, 1998, have been incorporated 
by reference in Parts I, II and III of the Annual Report on Form 10-K, to 
the extent indicated herein.

Index to Exhibits is in Part IV on pages 17 and 18.
This Form 10-K consists of 61 pages.

                            Page 1      
<PAGE>

                            FORM 10-K
                        TABLE OF CONTENTS

                            Part I

Item 1.   Business                                                3 
Item 2.   Properties                                             14 
Item 3.   Legal Proceedings                                      14
Item 4.   Submission of Matters to a Vote of Security Holders    14


                            Part II

Item 5.   Market for the Registrant's Common Equity and Related  
          Stockholder Matters                                    15
Item 6.   Selected Financial Data                                15
Item 7.   Management's Discussion and Analysis of Financial      
          Condition and Results of Operations                    15
Item 7a.  Quantitative and Qualitative Disclosures about 
          Market Risk                                            15
Item 8.   Financial Statements and Supplementary Data            15
Item 9.   Changes in and Disagreements with Accountants on 
          Accounting and Financial Disclosure                    15

                            Part III

Item 10.  Directors and Executive Officers of the Registrant     16
Item 11.  Executive Compensation                                 16
Item 12.  Security Ownership of Certain Beneficial Owners and
          Management                                             16
Item 13.  Certain Relationships and Related Transactions         16

                            Part IV

Item 14.  Exhibits, Financial Statement Schedules and 
          Reports on Form 8-K                                    17

<PAGE>

                               Part I

Item 1.  Business

OLD SECOND BANCORP, INC.

Old Second Bancorp, Inc. ("Bancorp") was organized on September 8, 1981 by 
the directors of The Old Second National Bank of Aurora ("Old Second").  
Bancorp was incorporated under the laws of the State of Delaware on September
18, 1981.

Bancorp is a multi-bank holding company principally engaged in the business of 
attracting deposits and investing these funds, together with borrowings and 
other funds, to primarily originate commercial, real estate and consumer 
loans and purchase investment securities. At December 31, 1997, Bancorp had 
seven subsidiary banks, as follows:  The Old Second National Bank of Aurora, 
The Old Second Community Bank of North Aurora, The Old Second Community Bank 
of Aurora, The Yorkville National Bank, Burlington Bank, Kane County Bank and 
Trust and Bank of Sugar Grove.  In addition, Bancorp has a mortgage banking 
subsidiary principally engaged in the business of originating, purchasing, 
selling and servicing residential mortgage loans.  

The directors of Bancorp are the same as the directors of Old Second.  The  
directors receive no fees for Bancorp meetings.  Bancorp has no salaried 
employees.  The officers of Bancorp are also officers of Old Second.

Executive Officers of the Registrant

Shown below are the names and ages of the executive officers of Bancorp with 
an indication of all positions and offices held with Bancorp:

<TABLE>
                                       Old Second Bancorp,
Name                     Age           Inc. Offices (1)   
- ----------------         ---           ------------------- 
<S>                      <C>            <C>                             
James E. Benson          67            Chairman, Chief Executive               
                                       Officer, and Director

R. J. Carlson            62            President, Chief Operating
                                       Officer, Chief Financial 
                                       Officer, Secretary and Director

William B. Skoglund      47            Vice President, Assistant
                                       Secretary and Director

George Starmann III      54            Vice President and
                                       Director  


<FN>
(1)  Offices with Bancorp have been held since the formation of Bancorp in 
1981, with the following exceptions:  James E. Benson was appointed Chairman
in 1992.  R. J. Carlson was promoted from Vice-President to President in 
1992 and was elected to the Board of Directors in January of 1987.  William 
B. Skoglund was appointed as an officer and elected as a director in March 
of 1992.  George Starmann III was appointed as Vice-President in 1994 and 
elected as a director in March 1995.  Officers are appointed annually by the 
Board of Directors.  
</TABLE>

                               Page 3
<PAGE>

OLD SECOND BANCORP SUBSIDIARIES

The Old Second National Bank of Aurora is located at 37 South River Street, 
Aurora, Illinois.  Old Second is the successor to a bank that was founded in
1871, and is incorporated under the laws of the United States.  Old Second 
offers complete banking and trust services for retail, commercial, 
industrial, and public entity customers in Aurora and the surrounding area.  
Services include loans to all customer segments, checking, savings and time 
deposits; lock box service and safe deposit boxes; trust and other fiduciary 
services to commercial customers and individuals and other customer services.
Non-FDIC insured mutual funds, stocks, bonds, securities and annuities are 
provided by LPL Financial Services, Inc., a registered broker/dealer and 
member NASD, SIPC.  Old Second has two offsite Automatic Teller Machines, 
and its customers can use certain other financial institutions' offsite 
teller machines to complete deposit, withdrawal, transfer, and other banking 
transactions.  
   
Old Second has full-service branches located at:  1991 West Wilson Street, 
Batavia;  4080 Fox Valley Center Drive, Aurora; 555 Redwood Drive, Aurora; 
1200 Douglas Road, Oswego, which opened in April of 1997; 1100 South County 
Line Road, Maple Park, and 2S101 Harter Road, Kaneville, both of which were 
acquired in June of 1997.  Old Second has trust offices at 37 South River 
Street in Aurora, 321 James Street in Geneva, and 122 North Main Street in 
Elburn. 

The Old Second Community Bank of North Aurora is located at 200 West John 
Street, North Aurora.  The Old Second Community Bank of Aurora is 
located at 1350 North Farnsworth Avenue, Aurora.  Yorkville 
National Bank is located at 102 East Van Emmon Street, Yorkville, with 
branches located at 408 East Countryside Parkway in Yorkville, 6800 West
Route 64 in Plano and 323 East Norris Drive in Ottawa.  Burlington Bank is 
located at 194 South Main Street in Burlington. Kane County Bank 
and Trust Company is located at 749 North Main Street in Elburn, 
with branches at 122 North Main Street in Elburn and 40W422 Route 64 in 
Wasco.  Bank of Sugar Grove is located on Cross Street at Illinois 
Route 47, Sugar Grove.

These Banks offer banking services for retail, commercial, industrial, and 
public entity customers in the Aurora, Batavia, Oswego, Maple Park, 
Kaneville, North Aurora, Yorkville, Plano, Ottawa, Burlington, Elburn, Wasco 
and Sugar Grove communities and surrounding areas.  Services include loans 
to all customer segments, checking, savings and time deposits, and other 
customer services.  With the exception of Yorkville's main banking facility, 
these Banks have onsite 24 hour Automatic Teller Machines, whereas Yorkville 
has one offsite Automated Teller Machine.  Their customers can use certain 
other financial institutions' offsite teller machines to complete deposit, 
withdrawal, transfer, and other banking transactions as well.

The banks are subject to vigorous competition from other banks and many 
savings and loan associations, as well as credit unions and other financial 
institutions in the area.  Within the Aurora banking market, which is 
approximated by the southern two-thirds of Kane County and the northern 
one-third of Kendall County, there are in excess of 20 other banks. Within the 
Yorkville National Bank banking market, which includes portions of Kane and 
LaSalle and all of Kendall counties, there are approximately 10 other banks 
or banking facilities and several savings and loan associations.
                                   
At December 31, 1997, Bancorp and its subsidiaries had 396 full-time and 125 
part-time employess. 

The only industry segment in which Bancorp and its subsidiaries are engaged 
in is banking, and there are no foreign operations.  Maple Park Mortgage 
("Maple Park") operates from leased offices in St. Charles, Sycamore, Oswego 
and Bannockburn, Illinois.  The main office is located at 1450 West Main 
Street in St. Charles.  Since 1992, Maple Park has developed a wholesale 
(correspondent) division primarily engaged in soliciting mortgage loans in 
Iowa, Colorado, Wyoming and Illinois.  The wholesale division emphasizes 
developing relationships with financial institutions.  Maple Park currently 
holds contracts with over 300 banks and credit unions.  Maple Park operates 
as a mortgage broker and servicer offering a wide range of products including 
conventional, fixed and adjustable-rate mortgages.  The New Leaf division 
of Maple Park is located in St. Charles and specializes in assisting 
prospective and current homeowners who do not qualify in the traditional 
market to obtain mortgages.  Maple Park currently has 57 full-time
employess and 2 part-time employees.

Maple Park faces vigorous competition in all phases of its retail and 
correspondent divisions.  Maple Park believes that competition for its retail
products is principally based on location, convenience, quality and price.
Within its retail mortgage banking market, there are approximately six large
companies offering mortgage banking products and services and a number of 
small or mid-sized brokerage operations.  Maple Park believes that 
competition for its correspondent division is primarily based on convenience, 
quality and price.  There are several large national companies competing in 
their correspondent markets.


                               Page 4
<PAGE>
                                  
ADDITIONAL  STATISTICAL INFORMATION - OLD SECOND BANCORP, INC.                  
CONSOLIDATED DAILY AVERAGE BALANCE SHEETS AND INTEREST RATES
<TABLE>

                                   Years Ended December 31,
                  1997                       1996                   1995 
                 ____________________________________________________________
                 Avg   Income   Yield Avg  Income   Yield  Avg  Income  Yield 
                 Bal   Expense  Rate  Bal  Expense  Rate   Bal  Expense Rate
                 ____________________________________________________________ 
ASSETS                                            
<S>             <C>    <C>      <C>   <C>   <C>      <C>   <C>   <C>     <C>
Interest bearing 
 deposits with 
 banks             298     22 7.38%     301     22 7.31%     477     22 4.61%
Federal funds 
 sold           43,803  2,407 5.50%  41,377  2,227 5.38%  39,329  2,274 5.78%
Investment 
 securities:                                           
Taxable        204,352 13,025 6.37% 196,791 12,723 6.47% 195,798 12,537 6.40%
Non taxable (1) 61,830  3,302 5.34%  68,276  3,755 5.50%  70,345  4,118 5.85%
Loans held for
 sale and net
 loans (2)     515,016 46,422 9.01% 448,422 40,959 9.13% 427,744 39,288 9.18%
               ------- ------ ----  ------- ------ ----  ------- ------ ----
Total interest 
 earning 
 assets (1)    825,299 65,178 7.90% 755,167 59,686 7.90% 733,693 58,239 7.94%
               ======= ====== ====  ======= ====== ====  ======= ====== ====
Cash and due 
 from banks     34,513               33,329               33,026    
Bank premises 
 and equipment, 
 net            20,514               18,833               17,753             
Other assets    21,034               19,267               23,453
                ------               ------               ------         
Total assets   901,360              826,596              807,925       
               =======              =======              =======        
LIABILITIES AND STOCKHOLDERS' EQUITY                                            
Interest bearing
 transaction 
 deposits      111,170  2,194  1.97% 108,091  2,361 2.18% 102,168  2,399 2.35%
Savings 
 deposits      185,304  5,726  3.09% 179,103  5,374 3.00% 176,977  5,776 3.26%
Time deposits  373,433 21,672  5.80% 339,529 19,512 5.75% 319,255 18,071 5.66%
               ------- ------  ----- ------- ------ ----  ------- ------ ----
Total deposits 669,907 29,592  4.42% 626,723 27,247 4.35% 598,400 26,246 4.39%
Securities sold 
 under agreements 
 to repurchase  13,958    690  4.94%   3,632    181 4.98%   3,688    142 3.85%
Notes payable    8,991    589  6.55%   2,377    221 9.30%   9,970    650 6.52%
Other short-term 
borrowings       3,415    180  5.27%   2,724    138 5.07%   4,555    284 6.23%
                 -----    ---  ----    -----    --- ----    -----    --- ----
Total interest
 bearing 
 liabilities   696,271 31,051  4.46% 635,456 27,787 4.37% 616,613 27,322 4.43%
               ======= ======  ====  ======= ====== ====  ======= ====== ====   
Demand 
 deposits      109,219               102,738              109,718
Other 
 liabilities     9,014                 6,951                8,582          
               -------               -------              -------   
Total 
 liabilities   814,504               745,145              734,913       
Stockholders' 
 equity         86,856                81,451               73,012         
               -------               -------              -------    
Total 
 liabilities and
 stockholders' 
 equity        901,360               826,596              807,925           
               =======               =======              =======              
Net interest 
 spread (1)                    3.44%                3.53%                3.51%
                               =====                =====                ====
Net yield on 
 interest earning 
 assets (1)                    4.14%                4.22%                4.21%
                               =====                =====                =====
</TABLE>
                                Page 5
<PAGE>


(1)  Interest income and yield on tax-exempt securities are not reflected in 
the tables on a tax-equivalent basis.  Net yield on interest-earning assets is
net interest income divided by total average interest-earning assets.

(2)  Principal balances on nonaccruing loans, if any, are included in net 
loans on the average balance sheet.  There were no out-of-period adjustments
or foreign activities for any reportable period.

Fees included in the above interest income computations are as follows, in
thousands:

                          Years Ended December 31,

                           1997           $719
                           1996           $731
                           1995           $648


Changes in Interest Income and Expense

The following table shows the dollar amount of changes in interest income and
expense, by major categories of assets and liabilities, attributable to 
changes in volume or rate or both, for the periods indicated, in thousands 
of dollars:

<TABLE>

                                       1997 Compared to 1996
                                     Increase (Decrease) Due To 
Interest income:                  Volume (1)     Rate(1)      Net    
                               -----------------------------------
<S>                           <C>            <C>            <C>
 Interest bearing deposits                                                 
    with banks                $   0          $    (0)       $   (0)            
 Investment securities: 
    Taxable                     482             (180)          302
    Non taxable                (344)            (109)         (453)
  Federal funds sold            133               47           180
  Loans, net                  5,972             (509)        5,463
                            -------          -------       -------
Net increase (decrease)     $ 6,243          $  (751)      $ 5,492 
                            -------          -------       -------
Interest expense:
  Interest bearing deposits $    61          $ (228)       $  (167)
  Savings deposits              192             160            352
  Time deposits               1,968             192          2,160
  Securities sold under 
    agreements to repurchase    510              (1)           509
  Notes payable                 411             (43)           368
  Other                          36               6             42
                            -------          ------       --------
Net increase                $ 3,178          $   86       $  3,264
Increase (decrease)         -------          ------       --------
 in net interest margin     $ 3,065          $ (837)      $  2,228  
                            -------          ------       --------    
</TABLE>
                                  Page 6
<PAGE>
<TABLE>
                                   1996 Compared to 1995 
                                 Increase (Decrease) Due To
Interest income:            Volume (1)     Rate(1)          Net
                            -------------------------------------
<S>                             <C>              <C>         <C>
 Interest bearing deposits         
    with banks              $   (13)        $    13       $     0
 Investment securities:
    Taxable                      65             121           186
    Non taxable                (114)           (249)         (363)       
 Federal funds sold             110            (157)          (47)
 Loans, net                   1,918            (247)        1,671         
                            -------         -------       -------
 Net increase (decrease)    $ 1,966         $  (519)      $ 1,447
                            -------         -------       -------
Interest expense:
 Interest bearing deposits  $   129         $  (167)      $   (38)
 Savings deposits                64            (466)         (402) 
 Time deposits                1,165             276         1,441
 Securities sold under 
    agreements to repurchase     (3)             42            39 
 Notes payable                 (591)            162          (429)    
 Other                          (93)            (53)         (146)      
                            -------         -------       -------
 Net increase (decrease)    $   671         $  (206)      $   465       
                            -------         -------       -------
Increase (decrease)     
  in net interest margin    $ 1,295         $  (313)      $   982  
                            -------         -------       -------

<FN>
1) The change in interest due to both rate and volume has been allocated to 
change due to volume and change due to rate in proportion to the the 
relationship of the absolute dollar amounts of the change in each.
</TABLE>
                                  Page 7

<PAGE>

Interest Rate Repricing Gaps

The management of interest rate sensitivity is accomplished by monitoring the 
maturities and repricing opportunities of interest-earning assets and 
interest-bearing liabilities. Amounts are positioned into rate maturity 
periods based upon contractual or historical experience of frequency of 
repricing the respective assets and liabilities. The following table 
summarizes the interest rate repricing gaps for selected maturity periods 
as of December 31, 1997:

OLD SECOND BANCORP, INC. 

<TABLE>
(In thousands)                               Rate Maturity Period         
                             ---------------------------------------------
                             0-90     91-180    181-365    Over 1
                             Days      Days      Days       Year     Total
                             --------------------------------------------- 
<S>                          <C>       <C>       <C>        <C>      <C>  
INTEREST-EARNING ASSETS:
- -----------------------
Interest-earning 
 deposits                 $   350                                   $   350
Federal funds sold         46,050                                    46,050
Investment securities      24,486   $  7,186   $ 19,754   $213,041  264,467
Loans held for sale        26,927                                    26,927
Loans, net                188,968     27,780     47,176    270,708  534,632
                         --------   --------   --------   --------   -------    
Total interest-earning 
  assets                 $286,781   $ 34,966   $ 66,930   $483,749  $872,426

INTEREST-BEARING
LIABILITIES:
- ------------------
Money market, savings 
  and NOW accounts       $203,902                         $100,755  $304,657
Time deposits             121,080   $ 61,938   $ 77,302    109,188   369,508
Other borrowed funds       53,477      1,629         50               55,156
                         --------   --------   --------   --------  --------    
Total interest- bearing 
  liabilities            $378,459   $ 63,567   $ 77,352   $209,943  $729,321

Period gap              $ (91,678)  $(28,601)  $(10,422)  $273,806  $143,105

Cumulative gap          $ (91,678)  $(120,279) $(130,701) $143,105

</TABLE>

Total interest-earning assets exceeded interest-bearing liabilities by 
$143,105,000 at December 31, 1997.  This difference was funded through 
noninterest-bearing liabilities and stockholders' equity. The above table 
shows that total interest-bearing liabilities maturing or repricing within 
one year exceed interest-earning assets maturing or repricing by 
$130,701,000. Theoretically, in a period of rising interest rates, it is 
preferable to have a positive gap (interest-earning assets in excess of 
interest-bearing liabilities) because more interest-earning assets should 
mature or reprice within a given time period than interest-bearing 
liabilities to increase interest income in excess of the increase in 
interest expense. Conversely, theoretically, in a period of declining 
interest rates, it is preferable to be in a negative gap position (interest-
bearing liabilities in excess of interest-earning assets) because more 
interest-bearing liabilities should mature or reprice to lower interest 
expense in excess of the decline in interest income. Because assets and 
liabilities do not reprice in exactly the same manner as interest levels 
change, the above table should not be viewed as a sole indicator of how the 
Bancorp will be affected by changes in interest rates.   

                                Page 8
<PAGE>                                  

                        INVESTMENT PORTFOLIO

The required information for book value, market value and maturities of 
investment securities appears in Note D  of the Annual Report to Stockholders 
and is incorporated by reference in this Annual Report on Form 10-K.

Weighted Average Yield of Investment Securities

The weighted average yield for each range of maturities of investment 
securities is shown below as of December 31, 1997:
<TABLE>

                                                   Maturing
                            ----------------------------------------------
                            Within    From 1 To    From 5 To       After
                            1 Year     5 Years     10 Years      10 Years  
                            ----------------------------------------------  
<S>                            <C>        <C>        <C>            <C>
U.S. Government and agency 
    obligations               6.17%      6.31%       7.02%         6.48%    
States & political  
    subdivisions              6.17       5.76        5.25          6.30
Collateralized mortgage 
    obligations               5.44       6.21      
Other                                                              6.60      
 
</TABLE>
[FN]
Note:  Yields on tax-exempt obligations are not computed on a tax equivalent 
basis.

                                  
                            LOAN PORTFOLIO

Classification of Loans 

The following table shows the classification of loans in thousands of 
dollars, on the dates indicated:

<TABLE>
                                                December 31, 
                              -------------------------------------------- 
                              1997      1996     1995      1994      1993      
                              --------------------------------------------
<S>                           <C>       <C>        <C>      <C>       <C> 
Commercial, financial, and 
    agricultural            $146,591  $143,961  $141,948  $146,890  $135,555  
Real estate-construction      43,095    40,437    35,653    32,548    25,744
Real estate-mortgage         287,167   248,742   239,081   185,698   181,886
Installment                   58,127    49,164    45,847    45,120    37,134
                            --------  --------   -------   -------  --------
    Total                   $534,980  $482,304  $462,529  $410,256  $380,319
                            ========  ========  ========  ========  ========

</TABLE>
 
The following table shows the percentage of total loans represented by each 
classification of loans on the dates indicated:

<TABLE>
                                                December 31, 
                               -------------------------------------------
                                 1997   1996     1995    1994      1993      
                               -------------------------------------------
<S>                             <C>     <C>      <C>      <C>       <C>     
Commercial, financial, and       
     agricultural               27.4%   29.8%    30.7%   35.8%     35.6%
Real estate-construction         8.1     8.4      7.7     7.9       6.8
Real estate-mortgage            53.6    51.6     51.7    45.3      47.8  
Installment                     10.9    10.2      9.9    11.0       9.8
                                ----    ----     ----    ----      ----      
     Total                     100.0%  100.0%   100.0%  100.0%    100.0%      
                               =====   =====    =====   =====     =====
    
</TABLE>
                               Page 9
<PAGE>

                      LOAN PORTFOLIO (continued)


Maturities of Loans and Sensitivity to Changes in Interest Rates

The following table is a summary of maturities of loans by certain categories
at December 31, 1997 in thousands of dollars:

<TABLE>
                             
                                             Due
                                            after    
                                Due in 1    1 year    
                                 year or   through   Due after                 
                                  less     5 years    5 years    Total 
                                --------------------------------------
<S>                              <C>        <C>        <C>        <C>         
Commercial, financial,      
  and agricultural              $71,959    $61,519   $13,113   $146,591
Real estate construction         35,043      8,052         0     43,095

</TABLE>

Commercial, financial, and agricultural loans due after one year in the 
amount of $80,353,000 at December 31, 1997 have floating or adjustable 
interest rates.  Such loans with fixed rates totaled $66,238,000.  Real 
estate construction loans due after one year in the amount of $29,849,000 
have floating or adjustable interest rates.  Such loans with fixed rates 
totaled $13,246,000.  Floating or adjustable interest rate loans are those 
on which the interest rate can be adjusted to changes in the prime rate or 
other rate changes.  Fixed rate loans are those on which the interest rate 
cannot be changed for the term of the loan.


                               Page 10
<PAGE>

Risk Elements        

Nonaccrual, past due and restructured loans include, respectively, loans on 
which no interest is currently being accrued, accruing loans which are past 
due 90 days or more as to principal or interest payments, and loans neither 
in nonaccrual status nor 90 day delinquent status on which the terms of 
maturity or interest rate have been renegotiated to provide a reduction or 
deferral of interest or principal payments due to a deterioration in the 
financial position of the borrower. It is management's general policy to 
discontinue the accrual of interest on a loan when it is past due 90 days 
with regard to either interest or principal payments.  At any given date,  
Bancorp's subsidiaries may have various loans outstanding, which are accruing
interest, are not contractually past due more than 90 days, and are not 
renegotiated, but which, in management's opinion, may not be repaid according
to original terms; these are shown below as "potential loan problems".  
Management periodically reviews these accounts which are currently in its 
portfolio and is of the opinion that, although some restructuring of loan 
terms may be required, no material loss of principal will occur.
    
The following is a summary of loans described above at the dates indicated, 
in thousands of dollars:

<TABLE>
                                              December 31,
                                 --------------------------------------
                                 1997     1996     1995    1994    1993
                                 -------------------------------------- 
<S>                               <C>      <C>      <C>     <C>    <C>   
Nonaccrual, past due and
 restructured loans
   a) Nonaccrual                $2,189   $3,505   $4,514  $2,344  $4,428     
   b) Past Due                   1,011      622      245     555     603      
   c) Restructured                 122        0       58      69      86
   
Potential Loan Problems(1)       6,911    7,334    5,198   4,389   2,188    

<FN>
(1)Loans in this category represent those which have been periodically 
delinquent as to the payment of principal and interest and are vulnerable to
adverse economic conditions.  The collateral position of Bancorp's 
subsidiaries on these loans mitigates the amount of loss exposure when viewed
in their entirety. There were no foreign outstandings or loan concentrations 
at the dates indicated.
</TABLE>

Following is information regarding interest income for the year ended 
December 31, 1997 for domestic loans which are on a nonaccrual basis or 
restructured as of December 31, 1997, in thousands of dollars:

  Gross interest income that would have been 
  included in income for 1997 if the loans  
  had been current in accordance with their
  original terms                                       $273     

  Gross interest income included in income on       
  these loans for 1997                                 $ 84



                                Page 11

<PAGE>
                   SUMMARY OF LOAN LOSS EXPERIENCE

Loan loss experience for the indicated periods in thousands of dollars is 
summarized as follows:
<TABLE>
                                       Years Ended December 31,
                              -------------------------------------------      
                              1997      1996      1995      1994     1993
                              -------------------------------------------     
<S>                           <C>       <C>       <C>       <C>      <C>
Average loans held for sale
   and loans net of unearned 
   income                    $521,906  $454,708  $434,403  $389,769  $362,752
                             ========  ========  ========  ========  ========
Allowance for possible 
  loan losses:                     
Balance at beginning of 
  period                    $  6,968  $ 6,686   $  6,370  $  5,110  $  5,230

Additions (deductions):

Charge-offs:
Commercial, financial and
  agricultural              $  1,285  $   615   $  3,299  $  1,701  $  1,577
Real estate-construction          81        0          0         0         0
Real estate-mortgage              67      117        134       130       438
Installment                      209      169        185       108       210 
                             -------   ------    -------   -------   -------
Total charge-offs              1,642      901      3,618     1,939     2,225

Recoveries:
Commercial, financial and
   agricultural                  176      362        431       783       342
Real estate-construction           0        0          0         0         0
Real estate-mortgage             105        0         11       425       170
Installment                       60       73         93       209        74
                              ------    -----     ------    ------   -------
Total recoveries                 341      435        535     1,417       586
                              ------    -----     ------    ------   -------
Net (charge-offs)             (1,301)    (466)    (3,083)     (522)   (1,639)

Provision charged to
   operating expense           1,256      748      3,399     1,782     1,519
                              ------    -----     ------     -----     -----
Balance at the end of period   6,923    6,968      6,686     6,370     5,110
                              ======    =====     ======     =====     =====

</TABLE>

The amount of additions to the allowance for possible loan losses charged to
operating expense for the periods indicated was based on a variety of factors,
including actual charge-offs during the year, historical loss experience,
industry guidelines and an evaluation of current and prospective economic 
conditions in the market area, and a review of the loans currently outstanding.

<TABLE>
Allowance for possible loan
losses by category:
<S>                         <C>       <C>        <C>      <C>       <C>
Commercial, financial and 
   agricultural             $  4,100  $ 4,100   $  3,990  $  3,730  $  2,985
Real estate-construction         185      185        180       160       115
Real estate-mortgage           1,060    1,060      1,040     1,000       815
Installment                    1,430    1,430      1,248     1,275       995
Unallocated                      148      193        228       205       200
                            --------  -------   --------  --------   -------  
Total                       $  6,923 $  6,968   $  6,686  $  6,370  $  5,110
                            ======== ========   ========  ========  ========
                           
Ratio of net (charge-offs) 
recoveries to average loans
outstanding for the period     (.25)%  (.10)%      (.71)%     (.13)%    (.45)%  
                                ===     ===         ===        ===       ===   
</TABLE>

                               Page 12
<PAGE>


Maturities of Certificates of Deposit of $100,000 or more

The following table sets forth the maturity of Time Deposits of $100,000 or 
more, in thousands of dollars, at the date indicated:


<TABLE>
                                              December 31,     
                                                  1997 
                                              -----------
<S>                                               <C>
Maturing within 3 months                      $   26,878               
After 3 but within 6 months                        9,516
After 6 but within 12 months                      15,532
After 12 months                                   18,531
                                              ----------- 
     Total                                    $   70,457
                                              =========== 
</TABLE>



Return on Equity and Assets
   
The following table presents certain ratios relating to equity and assets:

<TABLE>
                                                  Years Ended
                                                  December 31,                  
     
                                            1997       1996         1995
                                          --------------------------------
<S>                                        <C>           <C>         <C>    
Return on total average assets             1.06%        1.01%        1.08%

Return on average stockholders' equity    11.04%       10.24%       11.99%  
Dividend payout ratio                     28.34%       30.40%       24.39%
 
Average equity to average assets ratio     9.64%        9.85%        9.04%

</TABLE>


                               Page 13
<PAGE>

Item 2.  Properties

Except for certain teller machine locations, Old Second Bancorp subsidiaries
own 18 bank locations.  Old Second National Bank leases space for the Trust
office in Geneva and Yorkville National Bank leases space for a branch in the 
Super Wal-Mart in Plano.  Maple Park Mortgage operates its retail division 
from leased offices in St. Charles, Sycamore, Oswego and Bannockburn.  The 
administrative offices of Maple Park Mortgage are located in St. Charles.
 
Old Second's main banking office located at 37 South River Street, 
Aurora, Illinois, has a total of approximately 82,000 square feet. The 
original five story, 30,000 square foot building was built in 1925, and a two 
story, 24,000 square foot addition was constructed in 1982.  A 28,000 square 
foot building adjacent to the main bank is used for a ten lane drive-up bank 
facility and banking offices.  Parking facilities are provided for 
approximately one hundred cars. Old Second leases to others about 13,700 
square feet of building space and utilizes the remainder for its own 
operations. 


Item 3.  Legal Proceedings

In the normal course of business, Old Second Bancorp, Inc. and its 
subsidiaries are party to several legal proceedings, none of which are 
expected to have a materially adverse effect on its financial condition.

       
Item 4.  Submission of Matters to a Vote of Security Holders.

No matters were submitted to a vote of stockholders during the fourth quarter 
of fiscal 1997.



                               Page 14
<PAGE>
                                Part II

Item 5. Market for Registrant's Common Equity and Related 
        Stockholder Matters

The Common Stock of Bancorp, has been traded in the over-the-counter market on 
the NASDAQ National Market System under the symbol OSBC since November 11, 
1993.  Prior to that date, there was no established public trading market for 
Bancorp's Common Stock.  However, the stock was quoted on the over-the-counter 
market even though there was relatively little trading activity in the stock.  
Information regarding the number of stockholders and market price for 
Bancorp's Common Stock for 1997 and 1996 appears on page 52 of the Annual
Report to Stockholders and is incorporated by reference in this Annual Report
on Form 10-K.

Information regarding dividends declared on the Common Stock of Bancorp is 
described in the Capital and Dividends' portion of Management's Discussion on 
page 32 of the Annual Report to Stockholders and is incorporated by reference 
in this Annual Report on Form 10-K.

Information regarding dividend restrictions regarding Bancorp is described in 
Note P on page 46 of the Annual Report to Stockholders and is incorporated 
by reference in this Annual Report on Form 10-K.
  

Item 6.  Selected Financial Data

"Selected Consolidated Financial Data" for the five years ended December 31, 
1997 appears on page 32 of the Annual Report to Stockholders and is 
incorporated by reference in this Annual Report on Form 10-K.


Item 7.  Management's Discussion and Analysis of Financial Condition and 
Results of Operations

"Management's Discussion and Analysis of Financial Condition and Results of 
Operations" appears on pages 26 through 31 of the Annual Report to 
Stockholders and is incorporated by reference in this Annual Report on 
Form 10-K.

Item 7a.  Quantitative and Qualitative Disclosures about Market Risk

Quantitative and Qualitative disclosures on market risk appears in the 
Management's Discussion and Analysis on page of 29 of the Annual Report to 
Shareholders and is incorporated by reference in this Annual Report on 
Form 10-K.
 
Item 8.  Financial Statements and Supplementary Data

The Consolidated Financial Statements and Related Notes, and the report 
thereon of Ernst & Young LLP dated January 16, 1998, appear on pages 33
through 54 of the Annual Report to Stockholders and are incorporated by
reference in this Annaul Report on Form 10-K.

Item 9.  Changes in and Disagreements with Accountants on Accounting and 
Financial Disclosure 

     None.

                                   
                               Page 15
<PAGE>

                               Part III


Item 10.  Directors and Executive Officers of the Registrant

The required information for directors of the Registrant is shown on pages 4 
through 8, under "Election of Directors" in the Registrant's Proxy Statement 
and is incorporated by reference in this Annual Report on Form 10-K.  The 
required information for executive officers of the Registrant is included in 
Part I of this Form 10-K.


Item 11.  Executive Compensation

The required information for executive compensation of the Registrant is shown 
on pages 8 through 14 under "Executive Compensation" in the Registrant's Proxy 
Statement and is incorporated by reference in the Annual Report on Form 10-K.


Item 12.  Security Ownership of Certain Beneficial Owners and Management 

The required information for security ownership of certain beneficial owners 
and management of the registrant is shown on pages 3 and 4 under "Voting 
Securities and Principal Holders Thereof" in the Registrant's Proxy Statement 
and is incorporated by reference in this Annual Report on Form 10-K.


Item 13. Certain Relationships and Related Transactions

The required information for Certain Relationships and Related Transactions is 
shown on page 18 in the Registrant's Proxy Statement and is incorporated by 
reference in this Annual Report on Form 10-K.


                               Page 16

<PAGE>
                                Part IV


Item 14.  Exhibits, Financial Statement Schedules, and Reports on  Form 8-K.


(a)(1) Financial Statements                    Reference
       --------------------                  -------------
                                               Form 10-K  
    Incorporated by reference in Part        Annual Report    
     II, Item 8 of this report:                 (page)             
                                                                  
     Consolidated Balance Sheets as of
     December 31, 1997 and 1996                   33                  

     Consolidated Statements of Income
     for the years ended December 31,  
     1997, 1996, and 1995                         34                 

     Consolidated Statements of Cash Flows
     for the years ended December 31, 
     1997, 1996, and 1995                       35-36

     Consolidated Statements of Changes
     in Stockholders' Equity for the
     years ended December 31, 1997, 
     1996, and 1995                               36

     Notes to Consolidated Financial 
     Statements                                 37-51               

     Report of Independent Accountants            52                 

(2) Financial Statement Schedules
    -----------------------------

     No schedules are included as they are not required.

(3) Exhibits
    --------

     The Registrant hereby incorporates
        by reference its By-Laws as filed
        as exhibits to its Registration
        Statement on Form S-14 (File
        No.2-75588) which was filed
        with the Securities and Exchange
        Commission on January 22, 1982.

     

                               Page 17

<PAGE>

(a)(3) Exhibits (Continued)                  Reference               
                                            ------------ 
                                             Form 10-K 
                                            Annual Report 
                                               (page)            
                                

13.1  Old Second Bancorp, Inc. - 1997 
      Annual Report to Stockholders is 
      furnished for the information of 
      the Commission and iS not deemed to 
      be "filed as a part of this 10-K," 
      except for portions incorporated
      herein.                                    22-57  

22.1  Subsidiaries of the Registrant               58    

23.1  Consent of Independent Accountant            59

25.1  Audit Opinion of Independent Accountant      60

27.1  Financial Data Schedule                      61



Other exhibits are omitted because of the absence of conditions under which 
they are required.



(b)   Reports on Form 8-K: 

      There were no Form 8-K reports filed during the fourth quarter of 1997.



                              
                               Page 18

<PAGE>
                             SIGNATURES


Pursuant to the requirements of Section 13 or 15(d) 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.


                      OLD SECOND BANCORP, INC.
                            (Registrant)


          Date --------------------          By  /s/ James E. Benson    
                                             James E. Benson- Chairman,
                                             Chief Executive Officer, 
                                             and Director



          Date --------------------          By /s/ Ronald J. Carlson         
                                             Ronald J. Carlson - 
                                             President, Chief Financial
                                             Officer, Secretary and      
                                             Director
      

 
                               Page 19

<PAGE>                                  
                         SIGNATURES, Continued

Pursuant to the requirements of the Securities Exchange Act of 1934, this 
report has been signed below by the following persons on behalf of the 
registrant and in the capacities on the dates indicated.

               Date                         SIGNATURE AND TITLE
               ----                         -------------------

                                             /s/ Walter Alexander             
               ----------                   ---------------------------
                                            Walter Alexander - Director


                                             /s/ James E. Benson 
               ----------                   ---------------------------       
                                            James E. Benson - Chairman
                                            Chief Executive Officer,       
                                            and Director



                                             /s/ Ronald J. Carlson
               ----------                   ---------------------------       
                                            Ronald J. Carlson-President, 
                                            Chief Financial Officer, 
                                            Secretary and Director



               ----------                   ---------------------------      
                                            Marvin Fagel - Director


                                                                           
               ----------                   ---------------------------
                                            Joanne Hansen - Director


                                             /s/ Kenneth F. Lindgren
               ----------                   -----------------------------
                                            Kenneth F. Lindgren - Director



               ----------                   -----------------------------
                                            Jesse Maberry - Director


                                                                        
               ----------                   -----------------------------
                                            Gary McCarter - Director





                                Page 20

<PAGE>
                        SIGNATURES, continued


               Date                         SIGNATURE AND TITLE



             ----------                     ------------------------         
                                            D. Chet McKee - Director
                    

                                             /s/ William J. Meyer            
             -----------                    --------------------------- 
                                            William J. Meyer - Director

                             
             ----------                     ---------------------------
                                            Larry A. Schuster - Director



                                              /s/ Willaim B. Skoglund 
              ----------                    ---------------------------
                                            William B. Skoglund -
                                            Vice President, Assistant        
                                            Secretary, and Director


                                              /s/ George Starmann III
              ----------                     --------------------------      
                                             George Starmann III
                                             Vice President and Director


                               Page 21


<PAGE>


Old Second Bancorp, Inc.
1997 Annual Report

INDEX
- -----
Financial Highlights                                   1
                                        
Letter to Stockholders                                 2, 3
                              
Management's Discussion                                4-8
                              
Selected Consolidated Financial Data                   9

Consolidated Balance Sheets                            10

Consolidated Statements of Income                      11

Consolidated Statements of Cash Flows                  12

Consolidated Statements of Changes
        in Stockholders' Equity                        13

Notes to Consolidated Financial Statements             13-25

Report of Independent Accountants                      26

Corporate Information                                  27

Board of Directors                                     28, 29

Consolidating and Consolidated Balance Sheet           30, 31

Service Area Map and Locations                         32, 33


                             Page 22

<PAGE>


     FINANCIAL HIGHLIGHTS

In thousands, except per share data -
for the years ended December 31,

<TABLE>
                                             1997                 1996
                                           ---------            ---------
<S>                                         <C>                  <C>
Total Interest Income                      $  65,178            $  59,686
Net Interest Income After 
      Provision for Possible 
      Loan Losses                             32,871               31,151
Net Income                                     9,594                8,337
Per Share:
       Net Income - Basic                       3.15                 2.73
       Net Income - Diluted                     3.14                 2.73
       Cash Dividends Declared                   .89                  .83


At December 31
Assets                                       948,371              889,844
Loans, Net                                   527,709              474,946
Deposits                                     788,929              789,969
Stockholders' Equity Before Net Unrealized
        Gain on Investments                   90,768               83,896
          Per Share                            29.77                27.51
Total Stockholders' Equity                    92,121               84,200
          Per Share                            30.21                27.61

<FN>
Note:     The Financial Highlights for 1996 have been restated to reflect the 
          acquisition of Maple Park Bancshares, Inc., which was accounted for 
          as a pooling-of-interests. Per share numbers and amounts give 
          retroactive effect to a five-for-four stock split in 1996.

</FN>
</TABLE>
                                      Page 23
<PAGE>

     LETTER TO STOCKHOLDERS


To our Stockholders:

Old Second Bancorp, through the lead bank Old Second National, completed a 
very successful 126th year of business in 1997. This year, we very carefully 
planned for growth and expansion of services as well as completion of 
acquisitions and facilities. Much time and energy was put into our 
development plans which will ultimately enhance shareholder value.

Once again, most of our banks and branches met or exceeded their goals. We set 
new records for total assets, loans, income, dividends declared, and book 
value per share. Highlights are listed below, but detailed financial 
information is set forth in the reports that follow (all financial information 
has been restated to include Maple Park Bancshares, Inc.):

     Net income after taxes was $9,594,000, up  15.1%.
     Total assets at year end were $948,371,000, compared to $889,844,000 for 
           the prior  year.
     Stockholders' equity grew to $92,121,000.
     Cash dividends declared were $.89 per share,  a 7.2% increase over the 
           prior year.
     Return on equity was 11.04%.
     Return on assets was 1.06%.
     Basic earnings per share increased to $3.15 from  $2.73 in 1996.

Old Second Bancorp's stock price has increased dramatically over the past 
twelve months. Trades at the end of December 1996 were running in the 
$40.00-$41.00 per share range, while trades at the end of 1997, as reported by
NASDAQ, were in the $60.00 per share range.

Our Trust Department has had another exceptional year. Assets under management 
exceed $550,000,000. Trust fees for 1997 were at an all time high of 
$3,917,000. We look for continued growth in this area, and will consider 
establishing additional locations in the western suburbs to expand the 
three present locations of Aurora, Geneva and Elburn.

1997 was the first full year of operation for the Yorkville National Bank's 
Ottawa Branch. This branch was acquired in December of 1996. We are quite 
pleased with the growth and profitability of this branch. We think this is a 
good market for our company. In order to sustain and increase this growth we 
must provide additional space; so plans are now underway for a new building 
at the current location in Ottawa.

Our new full service branch of Old Second National Bank in Oswego opened in 
April of 1997.  We are pleased with this new location and expect good growth 
and profitability as this area continues to have remarkable growth.

The acquisition of Maple Park Bancshares was completed in May of 1997. This 
purchase included First State Bank of Maple Park which owned Maple Park 
Mortgage Company. The two bank locations of this acquisition, Maple Park 
and Kaneville, have been established as branches of The Old Second National 
Bank. The building that had been built in Elburn by Maple Park, but not 
occupied, has been transferred to our Kane County Bank and Trust Company, 
which moved into it during October of 1997. This will provide them with a much 
needed modern facility for better service to their existing customers as well 
as for the expected growth of this area.

Maple Park Mortgage Company has been set up as a separate wholly-owned 
subsidiary of Old Second Bancorp, Inc. This company operates out of offices in 
St. Charles, Bannockburn, Oswego and Sycamore, with many representatives
throughout the western suburban area. We expect this operation to generate 
substantial fee income.

The year of 1997 was no exception to expansion of electronic banking. In 
addition to our debit cards and corporate cash management services, we are 
now offering personal computer home banking (O2 PC Bank). Additional 
technology-driven services are currently being looked at so we remain 
competitive. Customers today expect a choice of how banking services are 
provided including ATM's, PC banking, telephone, mail, supermarkets and 
traditional banking facilities. We expect to provide these delivery 
opportunities as an access to our services as efficiently and as cost 
effective as possible.


                             Page 24
<PAGE>

Our goals for 1998 and into the next Millennium are to:

1.   Preserve, strengthen and enhance our existing customer base and to 
     increase market share in the Fox Valley and western suburbs that we serve.
2.   To provide timely, personalized service and state of the art delivery 
     systems.
3.   Invest capital into businesses that will produce value for our 
     stockholders.

These goals must be met without jeopardizing the strength and stability of our 
strong capital position.

Management of Old Second Bancorp, Inc. looks forward to the challenges of 1998 
and beyond.  We believe that 1998 will be an exciting and rewarding year. We 
feel that with our 18 banking locations, three Trust offices and four mortgage 
locations, we are well positioned to capitalize on the growth taking place in 
our market area.

We again remind ourselves that the key to our success stems directly from our 
fine staff of employees throughout our organization. I would again like to 
further thank our directors for their guidance and support, our stockholders 
for their confidence and our loyal customers for entrusting their business 
with Old Second Bancorp, Inc.


Sincerely,

/s/ James Benson

James Benson
Chairman and CEO


                              Page 25
<PAGE>

     MANAGEMENT'S DISCUSSION

MANAGEMENTS DISCUSSION AND ANALYSIS

Financial Condition and Results of Operations

The consolidated financial statements include the accounts of Old Second 
Bancorp, Inc.(the Corporation) and its subsidiaries, all of which are wholly 
owned.

On May 13, 1997, the Corporation issued 111,706 shares of common stock to 
acquire 100% of the outstanding common stock of Maple Park Bancshares, Inc. 
(Maple Park) which included First State Bank of Maple Park (First State Bank) 
and Maple Park Mortgage Company (Maple Park Mortgage). The two bank facilities 
of First State Bank, located in Maple Park and Kaneville, became branches of 
The Old Second National Bank (Old Second). Maple Park Mortgage has offices 
in Bannockburn, St. Charles, Sycamore and Oswego. The acquisition was  
accounted for as a pooling-of-interests; accordingly, all financial 
information for prior periods has been restated to include the 
accounts and results of operations of Maple Park. Maple Park had total assets 
of $59,266,000 at May 13, 1997.  During 1997, the Corporation also added new 
bank branches in Oswego and Elburn. With the acquisition of Maple Park and 
the additions of Oswego and Elburn, the Corporation increased the total number 
of locations to eighteen full-service bank facilities, three trust locations 
and four mortgage banking offices.

The Corporation continues to improve and develop operations designed to bring 
state-of-the-art products and services to customers. During 1997, we 
introduced "O2 PC Bank" which allows customers to access their banking 
through a personal computer from their home or office.  "O2 PC Bank" also 
allows customers to pay all of their bills electronically in the United 
States. We also updated our Infoline telephone banking system to include 
features such as transferring money between accounts, receiving a fax statement 
on checking or savings accounts, issuing a stop payment on a check and 
accessing information on certificates of deposits. The addition of Maple Park 
Mortgage expands the wide selection of home, adjustable rate, fixed rate and 
conventional mortgages available to customers. The New Leaf division of Maple 
Park Mortgage is located in St. Charles and specializes in assisting 
prospective and current homeowners who do not qualify in the traditional market 
to obtain mortgages. Loan originators are available at all 18 Old Second 
banking locations in addition to four Maple Park Mortgage offices for added 
customer convenience. Our efforts to meet the needs of our growing markets 
through new locations, products and services helped us reach many financial 
goals during 1997.

At December 31, 1997, total assets of $948,371,000 were $58,527,000 (6.6%) 
higher than year-end 1996.  Gross loans of $534,980,000 were up $52,676,000 
(10.9%) and deposits of $788,929,000 decreased by $1,040,000.

Throughout 1997, the Fox Valley area continued to grow due to strong housing 
and business development resulting in increased demand for real estate 
loan products, both commercial and residential. Construction and real estate 
mortgage loans represented $330,262,000 of gross loans at year-end 1997, an 
increase of $41,083,000 (14.2%) from year-end 1996.  Mortgage loans held for 
sale increased to $26,927,000 at year-end 1997 from $6,137,000 the prior 
year-end.  

Deposits were down slightly from year-end 1996 due primarily to anticipated 
decreases at the Ottawa and Maple Park locations which declined $17,403,000.  
On a consolidated basis, demand and savings deposits were down $3,572,000 
(3.0%) and  $615,000 (0.2%), respectively, from year-end 1996.  Time deposits 
have grown $3,147,000 (0.9%) since December 31, 1996. 

The Corporation also took advantage of additional funding sources including 
securities sold under agreements to repurchase and a note payable. Securities 
sold under agreements to repurchase increased to $22,926,000 from 
$1,838,000 in 1996. Additionally, a note payable of  $24,133,000 at year-end 
1997 relates to a line of credit used by Maple Park Mortgage to fund 
residential mortgages held for sale.

Net income for 1997 of $9,594,000 was up $1,257,000 (15.1%) from 1996, 
following a decrease of $419,000 (4.8%) in 1996 over 1995.

Net interest income for 1997 of $34,127,000 was up $2,228,000 from 1996 
following an increase of $982,000 in 1996 over 1995. Increases in both years 
were primarily due to volume.

Management's quarterly review of the adequacy of the allowance for possible 
loan losses and the amount of the provision for possible loan losses is based 
on various factors, such as the nature and volume of the loan portfolio, 
historical loss experience and changes in economic conditions.  The provision 
for possible loan losses for 1997 totaled $1,256,000 compared to $748,000 in 
1996 and $3,399,000 in 1995.  As anticipated during negotiations 
with Maple Park, Management conformed Maple Park's methodology for recording 
the allowance for possible 

                             Page 26
<PAGE>

MANAGEMENTS DISCUSSION AND ANALYSIS- (continued)

loan losses to Old Second's and an additional provision in 1997 was required.  
The provision for possible loan losses in 1996 and 1995 included $35,000 and 
$3,096,000 respectively for Maple Park. The subsidiaries realized net loan 
charge-offs of $1,301,000, $466,000, and $3,083,000 in 1997, 1996 and 1995, 
respectively, which includes net charge-offs of $269,000, $480,000, and 
$2,703,000 for Maple Park prior to acquisition.

Total other income for 1997 of $13,959,000 was substantially the same as 1996 
which was $4,274,000 lower than 1995. Increases in trust fees and service 
charges on deposit accounts in 1997 were offset by lower mortgage servicing 
income.  Trust fees of $3,917,000 in 1997 were at record high levels 
increasing $207,000 (5.6%) from 1996; the fees in 1996 were $660,000 (21.6%) 
higher than 1995. Service charges on deposit accounts of $3,134,000 were up 
from $2,907,000 in 1996; 1996 levels increased $298,000 from 1995.  The 
fluctuations in secondary mortgage fees and gains on sales of loans 
correspond to the changing demands of customers as they took advantage of 
refinancing during periods of declining interest rates. 

Total other expenses for 1997 of $33,218,000 were up $77,000 from 1996 
following a decrease of $476,000 in 1996 over 1995. The productivity ratio, 
defined as net interest income plus non-interest income divided by 
non-interest expenses, measures the effectiveness of the Corporation to 
generate interest and non-interest income, while controlling costs necessary 
to deliver quality products and service to customers. The productivity ratio 
was 145% in 1997, 138% for 1996 and 146% in 1995. 

Salaries and employees benefits of $17,953,000 in 1997 were up slightly (2.6%) 
from 1996 which was substantially the same as 1995. The rate of increase in 
1997 and 1996 was slowed due partially to the implementation of the 
cost- effective health care program in 1996 which resulted in increased 
employee usage of health maintenance organizations.

Net occupancy for 1997 was $2,162,000, a decrease of $54,000  from 1996 which 
was $222,000 higher than 1995.  The 1997 expense included costs associated 
with establishing the  Oswego branch. The increase in 1996 included 
costs associated with the Wal-Mart branch as well as higher maintenance and 
utilities costs for our expanded network of offices. 

Furniture and equipment costs were $3,275,000 for 1997 compared to $3,299,000 
in 1996 and $2,706,000 in 1995. The increase in expenses since 1995 reflect 
technology-related decisions of Management which included costs to expand our 
electronic banking capabilities with home banking and an income tax payment 
system for customers. 1997 and 1996 also include costs related to establishing 
new locations.

The premium for FDIC insurance is established by the federal regulatory agency 
and was substantially reduced in 1995. The current premium structure allows 
for varying rates based upon capitalization levels and soundness criteria. 
Prior to acquisition, Maple Park was not assessed premium rates at the lowest 
possible level. As of December 31, 1997, the strength of the subsidiaries' 
financial condition will result in premium rates assessed at the lowest 
possible level. The expense for FDIC insurance was $179,000 in 1997, $151,000 
in 1996 and $802,000 in 1995.

Marketing costs for 1997 were $1,126,000 compared to $1,119,000 in 1996 and 
$964,000 in 1995. Marketing expenses were higher in 1997 than 1996 because of 
higher discretionary marketing expenses. Stationery and supplies costs 
declined the past two years: total expenses were $941,000 in 1997, down 
$81,000 from 1996, which was $214,000 lower than 1995. The Corporation has 
successfully controlled costs in other expenses - other. These expenses 
were $6,454,000 in 1997, $79,000 higher than 1996 which was $885,000 lower 
than the 1995 total.

Income tax expense resulted in effective tax rates for 1997, 1996 and 1995 of 
29.5%, 30.3% and 27.8%, respectively. The increase in the effective tax rate 
in 1996 was mainly attributable to a decrease in interest exempt from 
federal income taxes. Generally, tax-exempt securities yield lower rates due 
to the tax benefit factor.  In making investment decisions, Management 
analyzes the tax-exempt yield adjusted for the tax benefit on tax-exempt 
securities in comparison to the yield available on taxable investments.  
Selection of specific investments is intended to maximize net income after 
taxes while considering the level of risk.  

In 1997, the Corporation adopted Statement of Financial Accounting Standards 
(SFAS) No. 128, "Earnings per Share", which prescribes the computation, 
presentation and disclosure requirements for earnings per share. The effect 
of adopting SFAS No. 128 was not material.

                             Page 27
<PAGE>
MANAGEMENTS DISCUSSION AND ANALYSIS - (continued)

In June 1997, the Financial Accounting Standards Board issued SFAS No. 130, 
"Reporting Comprehensive Income".  SFAS No. 130 establishes new rules for the 
reporting and display of comprehensive income and its components; however, 
adoption in 1998 will have no impact on the Corporation's net income or 
stockholders' equity. SFAS No. 130 requires unrealized gains or losses on the
Corporation's available-for-sale securities, which currently are reported in 
stockholders' equity, to be included in other comprehensive income and the 
disclosure of total comprehensive income. The adoption of SFAS No. 130 will 
not be material to the Corporation.

In June 1997, the Financial Accounting Standards Board issued SFAS No. 131, 
"Disclosures about Segments of an Enterprise and Related Information" which 
addresses the reporting of financial information from operating segments 
in annual and interim financial statements. The Corporation will apply SFAS 
No. 131 to financial statements presented after December 31, 1997 and, based 
on current circumstances, believes the effect of adoption will not be 
material. 

Liquidity

Liquidity is generally defined as the ability to meet cash flow requirements. 
For a bank, meeting cash flow requirements means having funds available to 
satisfy customer needs as well as having funds available to meet depositor 
withdrawal requests. For the parent company, liquidity means having funds 
available to pay cash dividends and operating expenses. Liquid assets consist 
primarily of non-interest bearing and interest bearing deposits, overnight 
federal funds sold and unpledged investment securities. The Consolidated 
Statement of Cash Flows included with the financial statements herein sets 
forth the cash flows from operating, investing and financing activities for 
the various time periods. 

For the year ended December 31, 1997, cash provided by operating activities 
resulted in cash outflows of  $3,765,000; while for years ended December 31, 
1996 and 1995, there were cash inflows of  $32,192,000, and $778,000, 
respectively.  Generally, cash inflows and outflows from operating activities 
result primarily from interest received in excess of the sum of interest paid 
and amounts paid to suppliers and employees plus the change in cash 
flows for mortgage loans originated, purchased and sold.

The primary components of cash flows used in investing activities are funding 
and repayment of customer loans and purchases, sales and maturities of 
investment securities. During 1997, the excess cash inflows from financing 
activities (discussed in the following paragraph) have been used to meet 
increased loan demand. The net cash outflows from investing activities were 
$34,440,000, $74,225,000 and $38,805,000 for 1997, 1996, and 1995, 
respectively. Cash flows provided by financing activities are primarily 
attributable to fluctuations in deposit levels, other short-term borrowings, 
notes payable and the payment of dividends to stockholders. During 1997, cash 
inflows of $44,223,000 from financing activities resulted primarily from 
increases in short-term borrowings and notes payable. Cash inflows from 
financing activities, primarily the result of increases in deposits, were 
$36,119,000 and $41,850,000 in 1996 and 1995, respectively. 

As Management attempts to efficiently use funds available for investing 
activities while maintaining adequate liquidity, cash and cash equivalents 
increased from $81,007,000 at year-end 1996 to $87,025,000 at year-end 1997. 
The net cash flows in 1996 resulted in a decline of $5,914,000 in cash and 
cash equivalents from year-end 1995.

The Corporation has several additional sources of liquidity including the 
unpledged portion of available-for-sale investment securities which at 19.0% 
of total assets represents a significant source of liquidity. Other sources 
include maturing loans and, to a lesser degree, the ability to borrow funds 
from correspondent banks and obtain funds in the federal funds and 
repurchase agreement markets. 

The cash requirements of the parent company have been met by dividends from 
its subsidiaries, which are the primary source of funds for dividends paid 
by the Corporation to stockholders. Dividend payments from the subsidiaries to 
the parent company are subject to limitations under certain banking 
regulations. However, certain amounts of retained earnings of the 
subsidiaries are free of such limitations. Management believes that the cash 
needs of the parent company can be met by dividend payments from the 
subsidiaries since a sufficient amount of subsidiaries' retained earnings is 
free of regulatory restrictions (See Note P - Dividend Limitation). 

Management feels that adequate liquidity has been maintained to meet cash flow 
requirements and is not aware of any known trends, events or uncertainties 
that will have, or that are reasonably likely to have, a material effect on 
the Corporation's or any subsidiaries' liquidity, capital resources or 
operations. 

                             Page 28
<PAGE>

Interest Rate Risk

The management of interest rate sensitivity is accomplished by monitoring the 
maturities and repricing opportunities of interest-earning assets and 
interest-bearing liabilities. Amounts are positioned into rate maturity periods 
based upon contractual or historical experience or frequency of repricing 
the respective assets and liabilities. Theoretically, in a 

MANAGEMENTS DISCUSSION AND ANALYSIS- (continued)

period of rising interest rates it is preferable to have what is commonly 
known as a positive gap (interest-earning assets in excess of interest-
bearing liabilities) because more interest-earning assets should mature or 
reprice within a given time period than interest-bearing liabilities to 
increase interest income in excess of the increase in interest expense.
Conversely, in a period of declining interest rates it is preferable to be in 
a negative gap position (interest-bearing liabilities in excess of interest-
earning assets) because more interest-bearing liabilities should mature or 
reprice resulting in lower interest expense in excess of the decline in 
interest income. Because assets and liabilities do not reprice in exactly the 
same manner as interest levels change, the theory noted herein should not be 
used as the sole indicator of how the Corporation would be affected by changes 
in interest rates.       

The Corporation has set specific guidelines to manage its cumulative gap 
position. If necessary, Management can shorten loan maturities, price loans 
with variable rates, purchase investment securities with short maturities or 
attract longer term certificates of deposits to manage the gap position of 
the Corporation. The effect on earnings and capital position would be 
considered when making decisions to manage the gap position. 

Many organizations use financial derivative products to provide greater 
flexibility in managing interest rate risk. Derivative financial instruments 
derive their value from the performance of assets, interest or currency 
exchange rates, or indexes. Derivative products include a wide assortment of 
financial contracts including structured notes, swaps, futures, options, 
forwards and various combinations thereof. These products vary greatly with 
respect to complexity and risk. The Corporation has invested in several types 
of structured notes that are classified as derivatives. All structured notes 
held by the Corporation are debt securities issued by U.S. government agencies. 
Although classified as available-for-sale, the Corporation has the ability to 
hold these investment securities to maturity and intends to do so; therefore, 
any unrealized gains or losses resulting from price fluctuations are 
considered temporary and are not expected to be realized by the Corporation. At 
December 31, 1997, the Corporation held structured notes of approximately 
$19,923,00 all of which mature in one to five years.

The following table provides information as of December 31, 1997 about the 
Corporation's financial instruments that are sensitive to changes in interest 
rates. Except for the effects of prepayments on mortgage related assets, the 
table presents principle cash flows and related weighted average interest 
rates by the earlier of term to repricing or contractual term to maturity. 
Principal payments on loans are included according to scheduled payments and 
maturity dates. The Corporation assumes that a portion of savings deposits 
are core deposits which are expected to roll off in over two years.


                              Page 29
<PAGE>

MANAGEMENTS DISCUSSION AND ANAYLSIS - (continued)

     MANAGEMENT'S DISCUSSION 
<TABLE>
                                       MATURITY OR REPRICING
                       ------------------------------------------------------
                       Within  3 Months   6 Months  One Year    Over
                         3       to 6      to One    to Two     Two 
                       Months   Months      Year     Years     Years     Total
                       ------------------------------------------------------
<S>                     <C>      <C>        <C>      <C>        <C>      <C>
Interest earning  
  financial assets:
Interest bearing 
  deposits  with banks      350                                           350  
Weighted average 
  interest  rate          5.00%                                         5.00%
Federal funds sol        46,050                                        46,050
Weighted average 
  interest rate           5.35%                                         5.35%
Investment securities    24,486   7,186     19,754   42,916  170,125  264,467
Weighted average 
  interest ra             5.53%   7.38%      6.13%    6.25%    6.25%    6.20% 
Loans held for sale      26,927                                        26,927
Weighted average 
  interest rate           7.50%                                         7.50% 
Commercial loans
    Fixed rate           19,154   9,169     12,699   12,297   22,958   76,277
       Weighted average
         interest rate    8.86%   8.80%      8.82%    8.89%    8.86%    8.85%
    Variable rate       102,891     354        960    1,939    1,898  108,042 
       Weighted average 
         interest rate    9.33%  10.27%      9.52%    9.51%    9.42%    9.34% 
Real estate loans
    Fixed rate           11,726   9,558     15,182   30,299   76,013  142,778 
       Weighted average 
         interest rate    9.09%   8.84%      8.57%    8.79%    8.82%    8.80%
    Variable rate        23,093   1,999      6,332    8,303   66,061  105,788 
       Weighted average 
         interest rate    8.98%   8.42%      8.13%    8.02%    8.08%    8.28% 
Installment loans
    Fixed rate            7,181   6,700     11,937   20,637   28,316   74,771 
       Weighted average 
         interest rate    9.02%   9.08%      9.05%    8.54%    8.58%    8.73% 
    Variable rate         1,180                                         1,180
       Weighted average 
         interest rate    9.46%                                         9.46% 
Other loans
    Fixed rate            3,418                66      1636      297     5417  
       Weighted average 
         interest rate    8.90%             7.50%     8.10%    7.23%    7.50%
   Variable rate         20,325                                        20,325 
       Weighted average 
         interest rate    9.65%                                         9.65%

Interest bearing
         financial 
         liabilities:

Savings deposits        203,902                              100,755  304,657 
       Weighted average 
         interest rate    2.97%                                2.80%    2.91% 
Certificates of 
  deposits              121,080   61,938    77,302    49,499  59,689  369,508 
       Weighted average 
         interest rate    5.76%    5.69%     5.68%     5.69%   5.44%    5.67% 
Securities sold under 
       agreements to                               
       repurchase and 
       short-term 
       borrowings        29,344   1,629         50                     31,023
          Weighted 
          average 
          interest rate   4.63%   5.34%       5.56%                     4.67%
Notes payable            24,133                                        24,133 
       Weighted average 
          interest rate   6.50%                                         6.50%

Period gap              (91,678)  (28,601)  (10,422)  68,528  205,224 143,051
Cumulative gap          (91,678) (120,279) (130,701) (62,173) 143,051  

</TABLE>

                             Page 30

<PAGE>

MANAGEMENTS DISCUSSION AND ANALYSIS- (continued)

Capital and Dividends

Total stockholders' equity of $92,121,000 at year-end 1997 increased 
$7,921,000 from 1996 due to higher retained earnings and an increase in the 
net unrealized gain on investments offset by dividends declared to 
stockholders.Available-for-sale investment securities are reported at market 
value on the Balance Sheet with the net unrealized gain (loss) on investments 
reported as a separate component of stockholders' equity. Since the 
Corporation generally holds investment securities until maturity, the net 
unrealized gain (loss) resulting from market fluctuations is considered 
temporary and is not expected to be realized.

Stockholders' equity before net unrealized gain on investments at December 31, 
1997 is 9.6% of total assets, up from 9.4% in 1996. The equity to asset ratio 
including the effect of the net unrealized gain on investments is 9.7% at 
December 31, 1997 compared to 9.5% at year-end 1996. The equity to asset ratios 
(leverage ratios) continue to be maintained at adequate levels.         

The Federal Reserve Board has established risk-based capital guidelines which 
include minimum capital requirements (see Note Q-Regulatory Matters).  At 
December 31, 1997, the minimum total and Tier 1 risk-based capital ratios 
were 8.00% and 4.00%, respectively.  As of December 31, 1997, the 
Corporation's total and Tier 1 risk-based capital ratios were 14.8% and 13.7%, 
respectively.  Total and Tier 1 risk-based capital ratios were 15.0% and 
13.8%, respectively, at December 31, 1996.

During 1997,  dividends declared were $.19 per share during the first quarter, 
$.20 per share during second, third and fourth quarters with a year-end extra 
dividend of $.10 for a total of $.89. During 1996, the Corporation declared 
total dividends of $.83 per share. 

Impact of Year 2000

The Corporation is currently in the process of addressing a potential problem 
that faces all users of automated systems including information systems. 
Many computer systems process transactions based on two digits representing 
the year of transaction, rather than a full four digits. These computer systems 
may not operate properly when the last two digits become "00", as will occur 
on January 1, 2000. The problem could effect a wide variety of automated 
information systems, such as mainframe applications, personal computers, 
communications systems, environmental systems and other information systems.

The Corporation has identified areas of operations critical for the delivery of 
its products and services. The majority of the programs/applications used in 
the Corporation's operations are purchased from outside vendors. The vendors 
providing the software are responsible for maintenance of the systems and 
modifications to enable uninterrupted usage after December 31, 1999. The 
Corporation's plan includes identification of the problems by performing an 
inventory of all software applications, obtaining certification of compliance 
from third parties and testing all of the impacted applications (both 
internally developed and third-party provided). The Corporation's goal is 
to have the plan complete and to be fully compliant by December 31, 1998. The 
vendor of the Corporation's core operating system has already provided 
certification of compliance with the year 2000 issue. Testing of the system 
will occur during 1998. Contingency plans, if any are needed, will be 
developed during 1998 to address potential problems that are identified. The 
Corporation's plan also includes reviewing any potential risks associated with 
the loan and investment portfolios due to the year 2000 issue.

Based on currently available information, Management does not anticipate that 
the cost to address year 2000 issues will have a materially adverse impact on 
the Corporation's financial condition or results of operations.

Effects of Inflation

The financial statements presented herein are prepared using historical 
dollars except for investment securities which are presented at market value. 
Inflation affects the operating results in the cost of operating expenses and 
the pricing of services. Management closely monitors expenses and the pricing 
of services so as to control expenses and adjust service fees in view of 
inflationary increases. Changes in inflation rates also affect the rates 
earned on assets and the rates paid on liabilities. The asset/liability 
management program will generally compensate for these effects over a given 
time period.

                             Page 31
<PAGE>

                         SELECTED CONSOLIDATED FINANCIAL DATA

(in thousands except share and per share data)
Old Second Bancorp, Inc. and Subsidiaries
<TABLE>
                           1997       1996       1995      1994       1993
                         -------   --------     ------    ------     ------
<S>                      <C>        <C>         <C>        <C>        <C>
BALANCE SHEET ITEMS 
     AT YEAR-END
Total Assets            $948,371   $889,844   $847,165  $786,502   $730,528
Net Loans                527,709    474,946    455,341   403,281    374,413
Total Deposits           788,929    789,969    737,991   696,903    643,853
Notes Payable             24,133      1,017     11,407     5,230      4,108
Stockholders' Equity 
     Before Net 
     Unrealized Gain 
     (Loss) on 
     Investments          90,768     83,896     78,096    71,489    
Total Stockholders' 
     Equity               92,121     84,200     79,615    65,679     67,285

RESULTS OF OPERATIONS
Net Interest Income     $ 34,127   $ 31,899   $ 30,917  $ 29,829   $ 28,277
Provision for Possible 
     Loan Losses           1,256        748      3,399     1,782      1,519
Net Income                 9,594      8,337      8,756     6,445      8,947

PER SHARE DATA
Net Income - Basic       $  3.15    $  2.73    $  2.87   $  2.11    $  2.93
Net Income - Diluted        3.14       2.73       2.87      2.11       2.93
Dividends Declared           .89        .83        .70       .63        .57
Stockholders' Equity Before
     Net Unrealized Gain 
     (Loss) on 
     Investments           29.77      27.51      25.61     23.44
Total Stockholders' 
     Equity                30.21      27.61      26.11     21.54      22.06

WEIGHTED AVERAGE SHARES
     OUTSTANDING       3,049,190  3,049,292  3,049,412  3,049,412  3,049,412
SHARES OUTSTANDING 
     AT YEAR-END       3,049,190  3,049,190  3,049,412  3,049,412  3,049,412

<FN>
Note: The Selected Consolidated Financial Data for prior years has been 
restated to reflect the acquisition of Maple Park Bancshares, Inc., which was 
accounted for as a pooling-of-interests. Per share numbers and amounts give 
retroactive effect to a five-for-four stock split in 1996.
</FN>
</TABLE>
                             Page 32
<PAGE>

CONSOLIDATED BALANCE SHEETS

(in thousands except share data)
Old Second Bancorp, Inc. and subsidiaries
<TABLE>
    
                                                     December 31,
                                                 1997            1996
                                               -------         --------
<S>                                             <C>              <C>
ASSETS
     Cash and Due From Banks                  $ 40,625         $ 40,132
     Interest Bearing Deposits with Banks          350              200
     Federal Funds Sold                         46,050           40,675
                                              ---------        --------
     Total Cash and Cash Equivalents            87,025           81,007

     Available-for-Sale 
        Investment Securities                  264,467          287,064
     Loans Held for Sale                        26,927            6,137
     Loans                                     534,980          482,304
         Less:  Allowance for Possible 
                   Loan Losses                   6,923            6,968
                   Unearned Income                 348              390
                                              ----------       ---------
     Loans, Net                                527,709          474,946
     Premises and Equipment, Net                20,805           19,410
     Other Assets                               21,438           21,280
                                               -------          -------
TOTAL ASSETS                                  $948,371         $889,844
                                               =======          =======

LIABILITIES
     Deposits
          Demand                              $114,764         $118,336
          Savings                              304,657          305,272
          Time                                 369,508          366,361
                                             ----------        ---------
          Total Deposits                       788,929          789,969

     Securities Sold Under 
        Agreements to Repurchase                22,926            1,838
     Other Short-term Borrowings                 8,097            4,401
     Notes Payable                              24,133            1,017
     Other Liabilities                          12,165            8,419
                                               -------          -------
TOTAL LIABILITIES                              856,250          805,644

STOCKHOLDERS' EQUITY
     Preferred Stock, no par value:
     300,000 shares authorized, none issued
     Common Stock, no par value:
     shares authorized: 6,000,000
     issued and outstanding: 3,049,190          15,844           15,844
     Retained Earnings                          74,924           68,052
                                               ---------       ----------
     Stockholders' Equity Before
     Net Unrealized Gain on Investments         90,768           83,896
     Net Unrealized Gain on Investments          1,353              304
                                                ------           ------
TOTAL STOCKHOLDERS' EQUITY                      92,121           84,200
                                                ------           ------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY    $948,371         $889,844
                                               =======          =======    
</TABLE>
See accompanying notes.

                             Page 33

<PAGE>
                         CONSOLIDATED STATEMENTS OF INCOME

(in thousands except share and per share data)
Old Second Bancorp, Inc. and Subsidiaries
<TABLE>
                                    for the years ended December 31,
                                   1997              1996             1995
INTEREST INCOME                  --------         -------          -------
<S>                              <C>               <C>             <C>
     Loans                        $46,422         $40,959          $39,288
     Investment Securities:
          Taxable                  13,025          12,723           12,537
          Exempt from Federal 
              Income Taxes          3,302           3,755            4,118
     Federal Funds Sold             2,407           2,227            2,274
     Interest Bearing Deposits 
        with Banks                     22              22               22
                                   ------          ------           ------
          Total Interest Income    65,178          59,686           58,239
                                   ------          ------           ------
INTEREST EXPENSE
     Savings Deposits               7,920           7,735            8,175
     Time Deposits                 21,672          19,512           18,071
     Other Borrowings               1,459             540            1,076
                                   ------          ------           ------
          Total Interest Expense   31,051          27,787           27,322
                                   ------          ------           ------  
          Net Interest Income      34,127          31,899           30,917
PROVISION FOR POSSIBLE 
    LOAN LOSSES                     1,256             748            3,399
                                   ------          ------           ------
          Net Interest Income 
             After Provision
             for Possible 
             Loan Losses           32,871           31,151          27,518
                                   ------           ------          ------
OTHER INCOME
     Trust Fees                     3,917            3,710           3,050
     Service Charges on 
Deposit Accounts                    3,134            2,907           2,609
     Secondary Mortgage Fees          926              915           2,012
     Mortgage Servicing Income        484            1,161           1,580
     Gain on Sale of Loans          4,035            3,609           3,262
     Gain on Sale of Mortgage 
        Servicing Rights                                             3,700
     Other                          1,463            1,658           2,021
                                   ------           ------          ------
          Total Other Income       13,959           13,960          18,234
                                   ------           ------          ------
OTHER EXPENSES
     Salaries and Employee 
        Benefits                   17,953           17,493          17,420
     Net Occupancy of Premises      2,162            2,216           1,994
     Furniture and Equipment        3,275            3,299           2,706
     FDIC Insurance                   179              151             802
     Marketing                      1,126            1,119             964
     Stationery and Supplies          941            1,022           1,236
     Amortization of Intangibles    1,128            1,466           1,235
     Other                          6,454            6,375           7,260
                                   ------           ------          ------
     Total Other Expenses          33,218           33,141          33,617
                                   ------           ------          ------
INCOME BEFORE INCOME TAXES         13,612           11,970          12,135
INCOME TAX EXPENSE                  4,018            3,633           3,379
                                   ------           ------          ------
NET INCOME                        $ 9,594          $ 8,337         $ 8,756
                                    =====            =====          ======
NET INCOME PER SHARE - BASIC      $  3.15          $  2.73         $  2.87
NET INCOME PER SHARE - DILUTED       3.14             2.73            2.87
WEIGHTED AVERAGE 
   SHARES OUTSTANDING           3,049,190        3,049,292       3,049,412

See accompanying notes.
</TABLE>
                             Page 34
<PAGE>

CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands)
Old Second Bancorp, Inc. and Subsidiaries
<TABLE>
                                    
                                  for the years ended December 31, 
CASH FLOWS FROM                   1997            1996            1995
  OPERATING ACTIVITIES:          -------        --------        --------
<S>                               <C>              <C>           <C>
     Interest Received           $64,620         $60,106        $57,963
     Interest Paid               (31,194)        (27,548)       (26,300)
     Paid to Suppliers and 
       Employees                 (26,665)        (26,654)       (30,302)
     Trust Fees Received           3,917           3,710          3,050
     Income Taxes Paid            (3,695)         (4,176)        (3,105)
     Service Charges Received 
       on Deposit Accounts         3,134           2,907          2,609
     Mortgage Loan Originations 
       and Purchases            (279,450)       (346,212)      (374,686)
     Mortgage Loans Sold to 
       Secondary Market          262,695         366,325        365,936
     Other Income Received         2,873           3,734          5,613
                                 -------         -------        -------
     Net Cash Provided By 
       Operating Activities       (3,765)         32,192            778
                                 -------         -------        -------
CASH FLOWS FROM INVESTING 
  ACTIVITIES:
     Net Increase in Loans       (54,019)        (42,994)       (43,447)
     Purchases of Available-
       for-Sale Securities       (57,078)        (90,193)       (54,977)
     Proceeds from Sales and 
       Maturities of Available-
         for-Sale Securities      80,809          64,972         57,399
     Net Cash and Cash 
       Equivalents Disbursed  
       For Acquisitions                           (3,505)             
     Net Proceeds on Sales 
       (Purchases) of Mortgage  
       Servicing Rights             (530)           (706)         4,164
     Capital Expenditures         (3,271)         (1,967)        (2,595)
     Other, Net                     (351)            168            651
                                 -------         -------        -------
     Net Cash Used In 
       Investing Activities      (34,440)        (74,225)       (38,805)
                                 -------         -------        -------
CASH FLOWS FROM FINANCING 
  ACTIVITIES:
     Net Increase (Decrease) 
       in Deposits                (1,040)         51,978         41,088
     Net Increase (Decrease) 
       in Other Short-term 
       Borrowings                 24,784          (2,900)         7,347
     Net Proceeds (Payments) 
       of Notes Payable           23,116         (10,390)        (1,608)
     Dividends Paid               (2,689)         (2,478)        (1,970)
     Other, Net                       52             (91)        (3,007)
                                  ------          -------        ------
              Net Cash Provided 
                By Financing 
                Activities        44,223          36,119         41,850
                                 -------         -------        -------
     Net Increase (Decrease) in 
       Cash and Cash Equivalents   6,018          (5,914)         3,823
     Cash and Cash Equivalents 
       at Beginning of Year       81,007          86,921         83,098
                                 -------         -------        -------
     Cash and Cash Equivalents 
       at End of Year            $87,025         $81,007        $86,921
                                  ======          ======         ======
</TABLE>

                              Page 35
<PAGE>
<TABLE>
<S>                                <C>            <C>           <C>
RECONCILIATION OF NET INCOME
  TO NET CASH PROVIDED
  BY OPERATING ACTIVITIES:
     Net Income                   $ 9,594       $ 8,337       $ 8,756
     Adjustments to Reconcile 
       Net Income to Net Cash 
       Provided By Operating 
       Activities:
     Depreciation                   1,876        1,711          1,958
     Provision for Possible  
       Loan Losses                  1,256          748          3,399
     Increase (Decrease) in 
       Current Taxes Payable          606         (177)           306
     Deferred Taxes, Net             (282)        (365)          (284)
     Net (Increase) Decrease 
       in Mortgages Held 
       for Sale                   (20,790)      16,504        (12,012)
     (Increase) Decrease in 
       Interest Receivable         (1,145)         168           (384)
     Increase (Decrease) in 
       Interest Payable              (143)         237            747
     Premium Amortization/
       Discount Accretion 
       on Investments, Net            587          252            577
     Amortization of 
       Intangible Assets            1,128        1,466          1,235
     Increase (Decrease) 
       in Accrued Expenses          3,476         (187)         1,472
     (Increase) Decrease in 
       Prepaid Expenses                73        3,498         (1,374)
     Gain on Sale of Mortgage 
       Servicing Rights                                        (3,700)
     Securities Gains                  (1)                        (45)
     Other                                                        127
                                  --------     -------        --------
     Total Adjustments            (13,359)      23,855         (7,978)
                                  --------     -------        -------
     Net Cash Provided By 
       Operating Activities      $ (3,765)    $ 32,192         $  778
                                   =======     =======        ======= 
</TABLE>
See accompanying notes.


CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDER'S EQUITY

(in thousands except per share data)
Old Second Bancorp, Inc. and Subsidiaries
<TABLE>
                                                   Net Unrealized
                            Common     Retained    Gain (Loss) on
                            Stock      Earnings    Investments       Total
                          ----------   --------    ---------------   --------
<S>                        <C>          <C>           <C>             <C>
Balance at January 
  1, 1995                  $15,844     $55,645        (5,810)        $65,679

     Net Income 
       for 1995                          8,756                         8,756
     Dividends Declared 
       ($.70 per share)                 (2,149)                       (2,149)
     Change in Net 
       Unrealized Gain 
       (Loss) for 1995                                 7,329           7,329
                           -------      ------        ------         -------
Balance at December 
  31, 1995                  15,844      62,252         1,519          79,615

     Net Income 
       for 1996                          8,337                         8,337
     Dividends Declared 
       ($.83 per share                  (2,537)                       (2,537)
     Change in Net 
       Unrealized Gain 
       (Loss) for 1996                                (1,215)         (1,215)
                          -------       ------        ------         -------
Balance at December 
  31, 1996                 15,844       68,052           304          84,200
     
     Net Income 
       for 1997                          9,594                         9,594
     Dividends Declared 
       ($.89 per share)                (2,722)                        (2,722)
     Change in Net 
       Unrealized Gain 
       (Loss) for 1997                                 1,049           1,049
                           -------    -------        -------         -------
Balance at December 
  31, 1997                 $15,844    $74,924        $ 1,353         $92,121
                            ======    =======         ======         =======
</TABLE>
See accompanying notes.


                               Page 36
<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Old Second Bancorp, Inc. and Subsidiaries

NOTE A - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
The accounting and reporting policies of Old Second Bancorp, Inc. (the 
Corporation) and its subsidiaries conform to generally accepted accounting 
principles and to general practice within the banking industry.  Certain 1996 
and 1995 amounts have been reclassified to conform to the 1997 presentation.  
The following is a description of the more significant of these policies:

Consolidation
The consolidated financial statements include the accounts of Old Second 
Bancorp, Inc. and its wholly-owned subsidiaries:  The Old Second National Bank 
of Aurora, The Old Second Community Bank of North Aurora, The Old Second 
Community Bank of Aurora, Yorkville National Bank, Burlington Bank, Kane 
County Bank and Trust, Bank of Sugar Grove, Maple Park Mortgage Company and 
Maple Park Bancshares, Inc.  All significant intercompany balances and 
transactions have been eliminated in consolidation.

The Corporation is a multi-bank holding company, principally engaged in the 
business of attracting deposits and investing these funds, together with 
borrowings and other funds, to primarily originate commercial, real estate and 
consumer loans, and purchase investment securities.  In addition to the bank 
subsidiaries, the Corporation has a mortgage banking subsidiary principally 
engaged in the business of originating, purchasing, selling and servicing 
residential mortgage loans. The Corporation conducts its activities from a 
network of offices in Kane, Kendall, DeKalb, DuPage, Lake and LaSalle 
counties.

Use of Estimates
The preparation of financial statements in conformity with generally accepted 
accounting principles requires Management to make estimates and assumptions 
that affect the amounts reported in the financial statements and 
accompanying notes.  Actual results could differ from these estimates.




                             Page 37
<PAGE>

NOTE A - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)

Cash Equivalents
For purposes of reporting cash flows, cash and cash equivalents include cash 
on hand, cash due from banks and federal funds sold.  Generally, federal funds 
are purchased and sold for one-day periods.

Investment Securities
The Corporation and its subsidiaries generally purchase securities for 
investing purposes.  Investment securities are classified in three 
categories and accounted for as follows:  (1) held-to-maturity - reported at 
amortized cost;  (2) trading securities - reported at fair value with 
unrealized gains and losses included in current earnings;  and (3)
available-for-sale securities - reported at fair value with unrealized gains 
and losses excluded from current earnings and reported as a separate 
component of stockholders' equity.

Realized gains and losses on the sale of investment securities are recognized 
at the time of the transaction and are determined by the specific 
identification method.

Loans Held For Sale
The Corporation's mortgage subsidiary originates residential real estate 
mortgage loans which are to be sold in the secondary market, including loans 
secured under programs with the Federal Home Loan Mortgage Corporation 
("FHLMC"), and the Federal National Mortgage Association ("FNMA"). Mortgage 
loans held for sale may be hedged with forward sales commitments in order 
to minimize interest rate market exposure by contracting for the sale of 
loans in the future at specific prices. Gains and losses from hedging 
transactions on residential real estate mortgage loans held for sale are 
included in the cost of the loans in determining the gain or loss when the 
loans are sold. Residential real estate mortgage loans held for sale are 
carried at the lower of aggregate cost or fair value.

Loans
Interest on installment loans made on a discounted basis is generally 
recognized as income using the interest method. Interest on all other loans 
is recorded as earned.

It is Management's policy to discontinue the accrual of interest income on any 
loan when there is reasonable doubt as to the timely collectibility of 
interest or principal.

Allowance for Possible Loan Losses
The allowance for possible loan losses is increased by provisions charged to 
operating expense and decreased by charge-offs, net of recoveries, and is 
available for losses incurred on loans.

The provision for possible loan losses is computed based on Management's 
judgment as to the adequacy of the allowance for possible loan losses after 
considering such factors as the volume and character of the portfolio, general
economic conditions and past loan loss experience.

A loan is considered impaired when the carrying amount of the loan exceeds the 
present value of the future cash flows, discounted at the loan's original 
effective rate.  However, as a practical expedient, Management measures 
impairment based on the fair value of the underlying collateral. 

Premises and Equipment
Premises and equipment are stated at cost less accumulated depreciation and 
amortization. Depreciation is computed over estimated useful lives of ten to 
forty years for premises and five to ten years for furniture and equipment 
principally by the use of accelerated depreciation methods.

Expenditures for maintenance and repair are expensed as incurred and 
expenditures for major renovations are capitalized. The cost of property 
retired or otherwise disposed of is applied against the related accumulated 
depreciation to the extent thereof, and any gain or loss on disposition is 
recognized at the time of disposal.

Real Estate Owned
Real estate owned is initially recorded at the lower of net book value or 
fair value, less estimated costs to sell. The excess of net book value over 
fair value at the foreclosure date is charged to the allowance for possible 
loan losses.  Subsequent to foreclosure, any gain or loss on disposition 
is recognized at the time of disposal.

Trust Department Revenue
Trust department income is recorded principally on a cash basis, which does 
not result in a material difference from the accrual basis.

                               Page 38
<PAGE>

NOTE A - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)

Retirement Plan Costs
The Corporation uses the "projected unit credit" actuarial method for 
financial reporting purposes and the entry age cost method for the funding 
of the qualified plan.

Long-Term Incentive Plan
The Corporation accounts for its Long-Term Incentive Plan in accordance with 
APB Opinion No. 25, "Accounting for Stock Issued to Employees". Under 
APB Opinion No. 25, as the exercise price of the Corporation's employees' 
stock options equals the market price of the underlying stock on the date of 
grant, no compensation expense is recognized. The amount of compensation 
expense which would have been recorded by the Corporation had it 
followed the provisions of SFAS No. 123, "Accounting for Stock-Based 
Compensation", would not have a material effect on net income per share.

Income Taxes
The Corporation provides for deferred tax assets and liabilities which 
represent differences between financial reporting and tax bases of assets 
and liabilities and are measured using the enacted tax rates and laws that 
will be in effect when the differences are expected to reverse. Deferred 
taxes arise because certain transactions affect the determination of 
taxable income for tax return purposes. Current tax expense is provided based 
upon the actual tax liability incurred for tax return purposes.

Per Share Amounts
Net income per share amounts are based upon the weighted average number of 
shares of Common Stock outstanding during each reported period. Prior year 
amounts have been restated to reflect the acquisition of Bank of Sugar Grove 
in 1995, a five-for-four stock split in 1996, and the acquisition of Maple 
Park in 1997.

In 1997, the Financial Accounting Standards Board issued Statement No. 128, 
"Earnings per Share".  Statement 128 replaced the calculation of primary and 
fully diluted earnings per share with basic and diluted earnings per share. 
Unlike primary earnings per share, basic earnings per share excludes any 
dilutive effects of options, warrants and convertible securities. Diluted 
earnings per share is very similar to the previously reported fully diluted 
earnings per share. All earnings per share amounts for all periods have been 
presented, and where appropriate, restated to conform to the Statement 128 
requirements.

Excess Purchase Price Over Fair Value Of Net Assets Acquired
The excess purchase price paid over the fair value of net assets acquired is 
included in other assets and is amortized into other expenses on a 
straight-line basis over fifteen years. This amount is periodically assessed 
to determine if impairment exists.

Financial Servicing Assets
During 1997, the Corporation adopted the requirements of SFAS  No. 125, 
"Accounting for Transfers and Servicing of Financial Assets and 
Extinguishments of Liabilities," for various transfers of receivables and 
other financial assets that occurred during the year. Adoption did not have 
a material effect on the Corporation's financial position or results of 
operations.

NOTE B - ACQUISITION
On May 13, 1997 the Corporation issued 111,706 shares of common stock to 
acquire 100% of the outstanding common stock of Maple Park Bancshares, Inc. 
(Maple Park). The acquisition of Maple Park was accounted for as a
pooling-of-interests; accordingly, all financial information for prior periods 
has been restated to include the accounts and results of operations of 
Maple Park.

Operating results for the Corporation and Maple Park prior to combination were 
as follows (in thousands):
<TABLE>
                       For the Period Ended         For the Period Ended
                       May 12, 1997                 December 31, 1996
                       --------------------------  --------------------------
                       Old Second                    Old Second   
                       Bancorp,     Maple            Bancorp,   Maple 
                       Inc.         Park  Combined   Inc.       Park  Combined
                       ----------   ---- ---------   ---------  ----- --------
<S>                       <C>       <C>     <C>        <C>       <C>    <C>
Net Interest Income       $10,910   $636   $11,546    $29,919  $1,980  $31,899
Net Income (Loss)           3,968   (142)    3,826     $9,632  (1,295)  $8,337
</TABLE>

                               Page 39
<PAGE>

NOTE B - ACQUISITION (continued)
On December 27, 1996, the Yorkville National Bank, a wholly owned subsidiary 
of the Corporation, purchased deposits of $28,489,000 from First of America 
- - Ottawa branch (Ottawa) for a premium of $3,505,000. The acquisition 
included the purchase of certain loans and bank premises of Ottawa. The 
premium on deposits will be amortized on a straight-line basis over a 
10 year period.

NOTE C - CASH AND DUE FROM BANKS
The subsidiaries maintain compensating cash balances under informal 
arrangements with their respective correspondents for services received. In 
addition, The Old Second National Bank of Aurora (Old Second) and Yorkville 
National Bank (Yorkville) are required to maintain certain average reserve 
balances with the Federal Reserve Bank. During 1997, average reserve balances 
with the Federal Reserve Bank were $7,853,000 and $982,000 for Old Second 
and Yorkville, respectively.

NOTE D - INVESTMENT SECURITIES
The amortized cost and estimated market values of investment securities at 
December 31, 1997 are as follows:
<TABLE>
                                           Gross        Gross
                                Amortized  Unrealized   Unrealized   Market
                                Cost       Gains        Losses       Value
                                -------------------------------------------
<S>                                <C>         <C>         <C>        <C>
U.S. Treasury                    $ 15,747    $   64       $   5    $ 15,806
U.S. Government Agencies          144,031     1,031         751     144,311
State & Political Subdivisions     75,398     1,870          68      77,200
Mortgage-Backed Obligations        25,336       120          49      25,407
Other                               1,743                             1,743
                                  -------     ------     -------    -------
                                 $262,255     $3,085     $   873   $264,467
                                  =======     ======      ======    =======
</TABLE>
The amortized cost and estimated market values of investment securities at 
December 31, 1996 are as follows:
<TABLE>
                                           Gross         Gross
                                Amortized  Unrealized    Unrealized  Market
                                Cost       Gains         Losses      Value
                                ------------------------------------------
<S>                               <C>         <C>         <C>        <C>
U.S. Treasury                   $ 21,014    $   77      $   42    $ 21,049
U.S. Government Agencies         146,871       634       1,228     146,277
State & Political Subdivisions    83,062     1,436         280      84,218
Mortgage-Backed Obligations       33,752        98         206      33,644
Other                              1,876                             1,876
                                 -------     -----      ------    --------
                                $286,575    $2,245      $1,756    $287,064
                                 =======     =====      ======     =======
</TABLE>


                               Page 40

<PAGE>

The contractual maturities of investment securities at amortized cost and 
estimated market value at December 31, 1997 are as follows:
<TABLE>
                          Within    One to       Five to    Over
                          One Year  Five Years   Ten Years  Ten Years  Total
                          --------------------------------------------------
<S>                        <C>       <C>           <C>         <C>      <C>
AMORTIZED COST
U.S. Treasury             $  8,451   $  7,296                        $ 15,747
U.S. Government Agencies    25,771    102,230     $11,730   $ 4,300   144,031
State & Political 
  Subdivisions              10,608     29,111      24,892    10,787    75,398
Other                                       2                 1,741     1,743
                            ------     ------      ------    ------    ------
                           $44,830   $138,639     $36,622   $16,828
                            ======    =======      ======    ======
Mortgage-Backed Obligations                                            25,336
                                                                       ------
                                                                     $262,255
                                                                       ======
MARKET VALUE
U.S. Treasury             $  8,465   $  7,341                        $ 15,806
U.S. Government Agencies    25,644    102,665     $11,685   $ 4,317   144,311
State & Political 
  Subdivisions              10,687     29,777      25,611    11,125    77,200
Other                                       2                 1,741     1,743
                            ------    -------      ------    ------    ------
                           $44,796   $139,785     $37,296   $17,183
                            ======    =======      ======    ======
Mortgage-Backed Obligations                                            25,407
                                                                      -------
                                                                     $264,467
                                                                      =======
</TABLE>
At December 31, 1997 and 1996, securities with an approximate aggregate 
amortized cost of $82,237,000 and $55,284,000, respectively, were pledged 
as collateral for public and trust deposits and for other purposes as 
required or permitted by law.

NOTE E - LOANS
The composition of loans outstanding by lending classifications is as follows:
<TABLE>
                                                  December 31,
                                             1997              1996
                                            -------          --------
<S>                                           <C>             <C>
Commercial, Financial and Agricultural     $146,591          $143,961
Real Estate - Construction                   43,095            40,437
Real Estate - Mortgage                      287,167           248,742
Installment                                  58,127            49,164
                                            -------           -------
                                           $534,980          $482,304
                                            =======           =======
</TABLE>
In the normal course of business, the subsidiary banks extend credit to 
executive officers and directors, associates of such persons and entities 
in which these persons have significant interests. The following is an 
analysis of these loans which aggregated at least $60,000 per related party:
<TABLE>
                                          for the years ended December 31,
                                             1997                1996
                                            ------             -------
<S>                                         <C>                  <C>
Balance, Beginning of Year                 $16,125             $13,670
New Loans                                   49,868              23,497
Repayments                                 (49,430)            (22,328)
Other Changes                                  780               1,286
                                           -------             -------
Balance, End of Year                       $17,343             $16,125
                                           =======             =======
</TABLE>

The subsidiary banks make commercial, agricultural, real estate and consumer 
loans to customers in their market area. There are no significant 
concentrations of loans where customers' ability to honor loan terms 
are dependent upon a single economic sector.

                              Page 41
<PAGE>

NOTE F - ALLOWANCE FOR POSSIBLE LOAN LOSSES
A summary of the activity in the allowance is as follows:
<TABLE>
                                      for the years ended December 31,
                                      1997           1996        1995
                                    --------       --------    --------
<S>                                   <C>             <C>         <C>
Balance, Beginning of Year           $6,968         $6,686      $6,370
Recoveries                              341            435         535
Provisions for Possible Loan Losses   1,256            748       3,399
Charge-offs                          (1,642)          (901)     (3,618)
                                      -----          -----       -----
Balance, End of Year                 $6,923         $6,968      $6,686
</TABLE>

NOTE G - PREMISES AND EQUIPMENT
The cost, accumulated depreciation and amortization, and net book value of 
premises and furniture and equipment are summarized below:
<TABLE>
                                            December 31, 1997
                               -------------------------------------------
                                               Accumulated         Net
                                               Depreciation &      Book
                                     Cost      Amortization        Value
                                ------------------------------------------
<S>                                 <C>            <C>              <C>
Land                               $ 4,568                        $ 4,568
Buildings and Improvements          21,210       $ 8,548           12,662
Furniture and Equipment             13,941        10,366            3,575
                                    ------        ------           ------
                                   $39,719       $18,914          $20,805
                                    ======        ======           ======
</TABLE>
                                   

NOTE G - PREMISES AND EQUIPMENT (continued)
The cost, accumulated depreciation and amortization, and net book value of 
premises and furniture and equipment are summarized below:
<TABLE>
                                            December 31, 1996
                                   ----------------------------------------
                                                 Accumulated        Net
                                                 Depreciation &     Book
                                      Cost       Amortization       Value
                                   ---------------------------------------
<S>                                   <C>            <C>             <C>
Land                               $ 4,146                         $ 4,146
Buildings and Improvements          19,571         $ 7,891          11,680
Furniture and Equipment             12,761           9,177           3,584
                                    ------          ------          ------
                                   $36,478         $17,068         $19,410
                                    ======          ======          ======
</TABLE>

NOTE H - MORTGAGE SERVICING RIGHTS
The changes in the Corporation's servicing assets are as follows.
<TABLE>
                                         for the years ended December 31,
                                         1997                    1996
                                        --------                --------
<S>                                       <C>                     <C>
Balance, Beginning of Year               $2,403                 $2,120
Additions                                   530                    706
Less: Amortization                         (390)                  (423)
                                         ------                 ------  
Balance, End of Year                     $2,543                 $2,403
                                         ======                 ======

</TABLE>

For purposes of measuring impairment, the Corporation stratifies the pools 
of assets underlying the servicing assets by loan type and interest rate. 
A valuation allowance is recorded where the fair value is below the carrying 
amount of specific stratifications, even though the overall fair value of 
the servicing assets exceeds amortized cost.

                               Page 42
<PAGE>

The changes in the Corporation's valuation allowance for serving assets are 
as follows:
<TABLE>
                                   for the years ended December 31,
                                   1997             1996           1995
                                  -------          -------        -------
<S>                                <C>               <C>           <C>
Balance, Beginning of Year         $252             $171
Provisions of Impairment                              81           $171
Less: Recoveries
                                   ----             ----           ----
Balance, End of Year               $252             $252           $171
                                   ====             ====           ====
</TABLE>

NOTE I - TIME DEPOSITS OF $100,000 OR MORE
Time Deposits of $100,000 or more were $70,457,000 and $77,748,000 at 
December 31, 1997 and 1996, respectively.

NOTE J - NOTES PAYABLE
$24,133,000 was outstanding at December 31, 1997 for a line of credit extended 
to Maple Park Mortgage for the funding of loans held for sale. There is 
$30,000,000 available through this line of credit which is due on July 1, 1998.
Interest payments are due on a monthly basis at a rate of 1% over the previous 
month average Federal Funds rate. The note is unsecured and repayment is 
guaranteed by Old Second Bancorp, Inc.

At December 31, 1996, Maple Park had notes payable at $1,017,000 which 
required semi-annual payments of principal and interest at the prime rate. 
These notes were fully paid in 1997.

NOTE K - INCOME TAXES
A summary of the provision for income taxes is as follows:
<TABLE>
                                           for the years ended December 31,
                                           1997         1996         1995
                                         --------     --------     ---------
<S>                                        <C>          <C>          <C>
Currently Payable, Principally Federal   $4,300       $3,998       $3,663
Deferred                                   (282)        (365)        (284)
                                         ------       ------       ------
                                         $4,018       $3,633       $3,379
                                         ======       ======        =====
</TABLE>
                         
                             Page 43

<PAGE>

NOTE K - INCOME TAXES (continued)
Temporary differences between the tax bases of assets and liabilities and 
their financial reporting amounts give rise to deferred tax assets and 
liabilities. The Corporation has the following temporary differences with 
their approximate tax effects resulting in a net deferred tax asset:
<TABLE>
                         December 31, 1997      December 31, 1996
                         -------------------  --------------------
                         Temporary   Tax       Temporary    Tax
                         Difference  Effect    Difference   Effect
                         ----------  ------    ----------   ------
<S>                        <C>        <C>         <C>          <C>
Loan Loss Allowance       $ 6,426    $ 2,185     $ 6,251   $ 2,125
Pension                       649        221         624       212
Other Assets                2,186        743       2,448       833
                          -------    -------     -------   -------
Total Deferred Assets       9,261      3,149       9,323     3,170

Accumulated Depreciation   (2,602)      (884)     (2,566)     (873)
Accretion on Investment 
  Securities                 (933)      (317)     (1,651)     (561)
Other Liabilities          (1,135)      (386)     (1,342)     (456)
                          -------     ------    --------   -------
Total Deferred 
  Liabilities              (4,670)    (1,587)     (5,559)   (1,890)
                          -------     ------     -------   -------
Net Deferred Tax Asset      4,591      1,562       3,764     1,280
Tax Effect of Net 
  Unrealized Gain 
  on Investments           (2,212)      (859)       (489)     (190)
                          -------     -------     ------   -------
Net Deferred Tax Asset 
  with Tax Effect of Net 
  Unrealized Gain on 
  Investments             $ 2,379      $ 703     $ 3,275   $ 1,090
                           ======       =====     =======   =======

</TABLE>
The principal items affecting the deferred income tax component of the 
provision for income taxes are as follows:
<TABLE>
                               for the years ended December 31,
                               1997              1996               1995
                            --------          --------           --------
<S>                           <C>                <C>               <C>
Loan Loss Provision           $(60)             $(263)             $(402)
Accelerated Depreciation        11                 (6)                58
Pension Expense                 (9)               (35)               (44)
Accretion of Premiums and 
  Discounts on Investment 
  Securities                  (244)               (69)               244
Other, Net                      20                  8               (140)
                              ----               ----               ----
                             $(282)             $(365)             $(284)
                              =====              ====               ====

</TABLE>
A reconciliation of the expected provision for income taxes at the statutory 
Federal income tax rate of 34% and the actual tax provision is as follows:
<TABLE>
                                                              
                                   for the years ended December 31,
                               1997            1996           1995
                            -------           -----          ------
                             Amount   %       Amount   %     Amount     %
                            -------- ----     ------- ----   -------   ----
<S>                          <C>      <C>      <C>     <C>     <C>      <C>
Expected Total Tax 
  Provision At Statutory 
  Rate                      $ 4,628  34.0%   $4,070   34.0%  $ 4,126   34.0%
Decrease Resulting From 
  Tax Exempt Income          (1,104) (8.1)   (1,226) (10.2)   (1,387) (11.4)
Increase Resulting From 
  Goodwill Amortization         150   1.1       215    1.8       175    1.4
State Taxes                     183   1.3       376    3.1       294    2.4
Other, Net                      161   1.2       198    1.6       171    1.4
                             ------  ----    ------   ----    ------    ---
                            $ 4,018  29.5   $ 3,633   30.3%  $ 3,379   27.8%
                             ======  ====    ======   ====    ======   ====
</TABLE>
                              Page 44

<PAGE>

NOTE L - RETIREMENT PLANS
The Corporation has a non-contributory defined benefit retirement plan 
covering substantially all of its banking subsidiaries' full-time and regular 
part-time employees.  Generally, benefits are based on years of service and 
compensation, as defined.

The following table sets forth the plan's funded status and amounts recognized 
in the Corporation's Consolidated Balance Sheets:
<TABLE>
                                     
Actuarial present value              December 31,
  of benefit obligations:            1997           1996           1995
                                   -------        --------       -------
<S>                                  <C>            <C>            <C>
Vested benefit obligations          $5,391         $4,644         $4,638
Nonvested benefit obligations          343            300            261
                                     -----          -----          -----
Accumulated benefit obligation       5,734          4,944          4,899
Excess of projected benefit 
  obligation over accumulated 
  benefit obligation                 1,646          1,362          1,286
                                     -----          -----          -----
Projected benefit obligation         7,380          6,306          6,185
Plan assets at fair value, 
  primarily listed common stocks,
  corporate, and U.S. Government 
  and Agency bonds                   7,648          6,770          6,349
                                     -----          -----          -----
Plan assets in excess of 
  projected benefit obligation         268            464            164
Unrecognized net (gain) or loss       (635)          (471)           187
Prior service cost not yet 
  recognized in net periodic 
  pension cost                          30           (71)           (135)
Unrecognized net asset at 
  January 1, 1987,  
  being amortized 
  over 17 years                       (515)         (602)           (688)
                                     -----         -----           -----
Unfunded pension cost 
  included in other liabilities     $ (852)       $ (680)         $ (472)
                                     =====         =====           =====
                                         
Net pension cost includes             for the years ended December 31, 
  the following components:          1997             1996           1995
                                  --------          -------        -------
Service cost                         $ 417         $ 388           $ 280
Interest cost                          457           416             392
Actual return on plan assets        (1,077)         (848)           (931)
Net amortization and deferral          480           251             361
                                     -----         -----           -----  
Net periodic pension cost            $ 277         $ 207           $ 102
                                     =====         =====           =====

</TABLE>
Certain employees participating in the defined benefit plan are also 
covered by an unfunded supplemental retirement plan.  The purpose of this 
plan is to extend full retirement benefits to individuals without regard to 
statutory limitations for qualified funded plans.  The following table sets 
forth the status of this supplemental plan:
<TABLE>
                                  for the years ended December 31,
                                            1997             1996
                                          -------           ------
<S>                                        <C>                <C>
Accumulated benefit obligation              $286             $429
Projected benefit obligation for 
  service rendered to date                   373              429
Accrued pension liability                    170              134
Net periodic pension expense                  52               57
</TABLE>

The weighted-average discount rate used in determining the actuarial present 
value of the projected benefit obligations was 6.75% at December 31, 1997, 
7.00 % at December 31, 1996 and 6.75% at December 31, 1995.  The expected 
long-term rate of return on assets was 8.00% for each of the three years.  
The assumed rate of increase in future compensation levels was 4.50% for 
each of the three years.

The subsidiaries of the Corporation have contributory and non-contributory 
Profit Sharing Plans covering substantially all of their respective 
full-time and regular part-time employees.  The amounts expensed with respect 
to these Profit Sharing Plans were $644,000 in 1997, $644,000 in 1996, 
and $649,000 in 1995.

                                 Page 45
<PAGE>

NOTE M - EARNINGS PER SHARE
The following table sets forth the computation of basic and diluted earnings 
per share (share and per share data not in thousands):
<TABLE>
                                              1997        1996      1995
                                             ------      ------    ------
<S>                                           <C>          <C>       <C>
Numerator for basic and diluted 
 earnings per share - net income             $9,594      $8,337    $8,756
                                             ======      ======    ======     
Denominator for basic earnings 
  per share -weighted average 
  shares outstanding                      3,049,190   3,049,292  3,049,412
Effect of dilutive securities - 
  employee stock options                      4,944       1,121
                                           --------   ---------  ---------
Denominator for diluted earnings 
  per share - adjusted weighted 
  average shares outstanding              3,051,134   3,050,413  3,049,412
                                          =========   =========  =========
Earnings per share - basic                    $3.15       $2.73      $2.87
Earnings per share - diluted                   3.14        2.73       2.87
</TABLE>

NOTE N - LONG TERM INCENTIVE PLAN
The Corporation has a Long-Term Incentive Plan under which stock options and 
stock appreciation rights may be granted to employees at the discretion of 
the Board of Directors.  During 1997, 14,050 options which expire in 2007 
were granted at an exercise price of $60.50. During 1996, 10,100 options were 
granted at an exercise price of $40.875 per share. These options expire in 
2006. During 1995, 8,875 options expiring in 2005 were granted at an 
exercise price of $31.20 per share, and 8,875 options were granted at an 
exercise price of $36.80 per share.  Of these options, 250 expired in 1996 
and the remaining options expire in 2005. The exercise price of these options 
was equal to the market price of the underlying stock on the grant date.  At 
December 31, 1997, 15,033 of the options were exercisable. No stock 
appreciation rights have been granted to date. 

NOTE O - COMMITMENTS AND CONTINGENCIES
In the normal course of business, there are outstanding commitments and 
contingent liabilities which are not reflected in the financial statements.  
Commitments and contingent liabilities include financial instruments which 
involve, to varying degrees, elements of credit, interest rate and liquidity 
risk.  In the opinion of Management, these do not represent unusual risks 
for the Corporation's subsidiaries and Management does not anticipate any 
significant losses as a result of these transactions.  The Corporation uses 
the same credit policies in making commitments and conditional obligations 
as it does for on-balance sheet instruments.  Standby letters of credit 
outstanding at December 31, 1997, are approximately $11,336,000.  Firm 
commitments by the Corporation's subsidiaries to fund loans in the future 
are approximately $187,972,000 as of  December 31, 1997.  There are various 
other outstanding commitments and contingent liabilities arising in the 
normal course of business.  Disposition of these, in the opinion 
of Management, will not have a material effect upon financial position.

NOTE P - DIVIDEND LIMITATION
Under certain banking regulations, regulatory approval is required before 
dividends declared by the Corporation's subsidiary Banks can exceed defined 
limits.  At December 31, 1997, $17,645,000 of retained earnings of subsidiary 
Banks are free of such regulatory limitations.  There are no such restrictions 
regarding the Corporation.  As a practical matter, dividend payments are 
restricted to lesser amounts as a result of the maintenance of prudent 
capital levels.

NOTE Q - REGULATORY MATTERS
The subsidiaries of the Corporation are subject to various regulatory capital 
requirements administered by the regulatory banking agencies. Failure to 
meet minimum capital requirements can initiate certain mandatory and 
possible additional discretionary actions by regulators that, if undertaken, 
could have a direct material effect on the Corporation's financial 
statements. Under capital adequacy guidelines and the regulatory framework 
for prompt corrective action, the subsidiaries of the Corporation must meet 
specific capital guidelines that involve quantitative measures of assets, 
liabilities, and certain off-balance sheet items as calculated under 
regulatory accounting practices. The subsidiaries' capital amounts and 
classification are also subject to qualitative judgments by the regulators 
about components, risk weightings, and other factors.


                                 Page 46
<PAGE>

NOTE Q - REGULATORY MATTERS (continued)

Quantitative measures established by regulation to ensure capital adequacy 
require the Corporation's subsidiaries to maintain minimum amounts and 
ratios (set forth in the table below) of total and Tier 1 capital to risk-
weighted assets, and of Tier 1 capital to average assets (as defined in the 
regulations). Risk-weighted assets are determined by weighing assets and 
off-balance sheet exposures according to their designated relative credit 
risks. Tier 1 capital includes certain classes of preferred stock and 
equity capital, net of certain adjustments for intangible assets and 
investments in non-consolidated subsidiaries. Total capital consists of Tier 
1 capital plus subordinated debt, some types of preferred stock and an 
adjustment for allowance for possible loan losses. Management believes, as of 
December 31, 1997, the Corporation's subsidiaries meet all capital adequacy 
requirements to which they are subject.

The total and Tier 1 capital amounts and ratios on a consolidated basis and 
for Old Second, a significant subsidiary of the Corporation, are set forth 
in the table below. Included are the minimum ratios as defined by regulatory 
agencies to maintain minimum Capital Adequacy and to be Well Capitalized Under 
Prompt Corrective Action Provisions and the actual amounts on a consolidated 
basis and for Old Second that satisfy such minimums.
<TABLE>
    
                                                             To Be Well
                                                             Capitalized Under
                                         For Capital         Prompt Corrective
                             Actual      Adequacy Purposes:  Action Provisions:
                      -----------------  ------------------  -----------------
                       Amount    Ratio     Amount    Ratio    Amount    Ratio
                      --------  -------  ----------  ------   -------   ------
<S>                    <C>       <C>       <C>        <C>      <C>      <C>
CONSOLIDATED:
As of December 
  31, 1997
     Total Capital to 
       Risk Weighted  
       Assets          $90,378    14.8%    $48,877    8.0%    $61,096    10.0%
     Tier 1 Capital 
       to Risk 
       Weighted 
       Assets           83,454    13.7      24,438    4.0      36,658     6.0
     Tier 1 Capital 
       to Average 
       Assets           83,454     8.8      37,878    4.0      47,347     5.0

As of December 
  31, 1996
     Total Capital to 
       Risk Weighted 
       Assets           83,502     15.0     44,453    8.0      55,566    10.0
     Tier 1 Capital to 
       Risk Weighted  
       Assets           76,563     13.8     22,227    4.0      33,340     6.0
     Tier 1 Capital to 
       Average Assets   76,563      9.3     32,835    4.0      41,044     5.0

OLD SECOND:
As of December 
  31, 1997
     Total Capital to 
       Risk Weighted 
       Assets           50,202     13.7     29,271    8.0      36,589    10.0
     Tier 1 Capital to 
       Risk Weighted 
       Assets           46,520     12.7     14,636    4.0      21,953     6.0
     Tier 1 Capital to 
       Average Assets   46,520      8.7     21,461    4.0      26,826     5.0

As of December 
  31, 1996
     Total Capital to 
       Risk Weighted 
       Assets           45,057     15.1     23,941    8.0      29,927    10.0
     Tier 1 Capital to 
       Risk Weighted 
       Assets           41,669     13.9     11,971    4.0      17,956     6.0
     Tier 1 Capital to 
       Average Assets   41,669      9.7     17,162    4.0      21,452     5.0
</TABLE>

NOTE R - FAIR VALUE OF FINANCIAL INSTRUMENTS
Statements of Financial Accounting Standard Number 107, "Disclosure About Fair 
Value Of Financial Instruments" requires that the Corporation disclose 
estimates, methods, and assumptions used in determination of the fair values 
of the Corporation's financial instruments, as set forth below.

Cash and Cash Equivalents, Securities Sold Under Agreement to Repurchase and 
Other Short-Term Borrowings.  For these short-term instruments, the carrying 
amount is a reasonable estimate of fair value.

Investment securities
For investment securities, fair values are based on quoted market prices or 
dealer quotes.  If a quoted market price is not available, fair value is 
estimated using quoted market prices for similar securities.


                              Page 47
<PAGE>

NOTE R - FAIR VALUE OF FINANCIAL INSTRUMENTS (continued)

Loans
Fair values are estimated for portfolios of loans with similar financial 
characteristics.  Loans are segregated by type, such as commercial, 
commercial real estate, residential mortgage, credit card, and other consumer.  
Each loan category is further segmented into fixed and adjustable rate 
interest terms.  Cash flows are discounted using current rates at which 
similar loans would be made to borrowers with similar credit ratings and for 
the same remaining maturities.

Deposit Liabilities
The fair value of demand deposits, savings accounts, and certain money market 
deposits is the amount payable on demand at the reporting date.  The fair 
value of fixed-maturity certificates of deposit is estimated by discounting 
future cash flows at rates currently offered for deposits of similar 
remaining maturities.

Notes Payable
Rates currently available to the Corporation for debt with similar terms and 
remaining maturities are used to estimate fair value of existing debt.

Commitments to Extend Credit and Standby Letters of Credit
The fair value of commitments is estimated using the fees currently charged 
to enter into similar agreements, taking into account the remaining terms 
of the agreements and the present creditworthiness of the counterparties.  For 
fixed-rate loan commitments, fair value also considers the difference between 
current levels of interest rates and the committed rates.  The fair value 
of letters of credit is based on fees currently charged for similar agreements 
or on the estimated cost to terminate them or otherwise settle the 
obligations with the counterparties at the reporting date.

The carrying amount and estimated fair value of the Corporation's financial 
instruments are as follows:
<TABLE>
                              December 31, 1997          December 31, 1996
                              -----------------------    ---------------------
                                Carrying     Fair        Carrying      Fair
                                Amount       Value       Amount        Value 
Financial Assets:             ----------   ----------    ---------     -------
<S>                            <C>           <C>          <C>           <C>
     Cash and Cash 
       Equivalents              $ 87,025   $ 87,025      $ 81,007     $ 81,007
     Available-for-Sale 
       Securities                264,467    264,467       287,064      287,064
     Loans Held for Sale          26,927     26,927         6,137        6,137
     Loans, Net                  527,709    533,103       474,946      481,185
                                --------   --------      --------     --------
Total Financial Assets          $906,128   $911,522      $849,154     $855,393

Financial Liabilities:
     Deposits                   $788,929   $798,152      $789,969     $788,243
     Securities Sold Under 
     Agreements to Repurchase     22,926     22,926         1,838        1,838
     Other Short-Term Borrowings   8,097      8,097         4,401        4,401
     Note Payable                 24,133     24,133         1,017        1,017
                                --------   --------      --------     --------
Total Financial Liabilities     $844,085   $853,308      $797,225     $795,499
                                ========   ========      ========     ========
Unrecognized Financial 
  Instruments:
     Commitments to 
       Extend Credit                       $     18                   $    322
     Standby Letters of Credit                 (113)                      (76)
                                            --------                   -------
Total Unrecognized Financial 
  Instruments                              $    (95)                  $    246
                                             =======                   =======
</TABLE>

                                  Page 48
<PAGE>

NOTE S - SUMMARY OF QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

The following unaudited quarterly financial information, in the opinion of 
Management, fairly presents the results of operations for such periods.
<TABLE>
                       1997 Quarter                   1996 Quarter
               -----------------------------  --------------------------------
                 4th     3rd   2nd     1st      4th      3rd    2nd      1st
               ------- ------ ------  ------  -------  ------  ------   ------
<S>             <C>     <C>    <C>     <C>      <C>     <C>     <C>      <C>
Interest 
  Income      $17,333 $16,764 $15,598 $15,483 $15,242 $15,055 $14,573  $14,816
Interest 
  Expense       8,285   8,174   7,394   7,198   7,144   6,996   6,671    6,976
Net Interest 
  Income        9,048   8,590   8,204   8,285   8,098   8,059   7,902    7,840
Provision for 
  Possible
  Loan Losses     355     356     350     195     204     265     140      139
Income Before 
  Income Taxes  4,417   3,604   2,320   3,271   2,369   3,083   3,036    3,482
Net Income      3,325   2,500   1,495   2,274   1,811   2,088   2,065    2,373
Net Income Per 
  Share - Basic  1.09     .82     .49     .75     .59     .68     .68      .78
Net Income Per 
  Share - 
  Diluted        1.08     .82     .49     .75     .59     .68     .68      .78

</TABLE>

NOTE T - CONDENSED FINANCIAL INFORMATION OF THE CORPORATION ONLY

Following is condensed financial information of the Corporation only, for the 
respective dates and time periods shown:
<TABLE>
Condensed Balance Sheets
                                                       December 31,
                                                  1997             1996
<S>                                               <C>               <C>
ASSETS
     Cash on Deposit with Bank Subsidiaries    $  1,198          $  2,078
     Investment In Wholly-Owned Subsidiaries     89,799            80,342
     Available-for-Sale Securities                2,087             2,787
     Other Assets                                   116                78
                                                 ------            ------
TOTAL ASSETS                                    $93,200           $85,285
                                                 ======            ======
LIABILITIES AND STOCKHOLDERS' EQUITY
     Other Liabilities                          $ 1,079           $ 1,085
     Stockholders' Equity                        92,121            84,200
                                                 ------            ------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY     $ 93,200           $85,285
                                                 ======            ======
</TABLE>
                                 Page 49

<PAGE>   

NOTE T - CONDENSED FINANCIAL INFORMATION OF THE CORPORATION ONLY-(continued)
<TABLE>
Condensed Statements of Income
                                     for the years ended December 31,
                                      1997            1996             1995
INCOME                              --------        --------         --------
<S>                                  <C>              <C>              <C>
     Dividend Income from  
       Subsidiaries                 $ 3,915         $ 4,015          $ 3,730
     Interest Income                    161             122               40
                                     ------           -----            -----
TOTAL INCOME                          4,076           4,137            3,770

EXPENSES
     Other Expenses                     952             903              898
                                      -----           -----            -----
TOTAL EXPENSES                          952             903              898

Income Before Income Taxes and 
  Equity In Undistributed Net 
  Income of Subsidiaries              3,124           3,234            2,872
Income Tax Benefit                     (192)            (83)            (201)
                                      -----           -----            ----
Income Before Equity In 
  Undistributed Net 
  Income of Subsidiaries              3,316           3,317            3,073
Equity In Undistributed Net 
  Income of Subsidiaries              6,278           5,020            5,683
                                     ------          ------           ------
NET INCOME                         $  9,594         $ 8,337          $ 8,756
                                     ======           =====            =====
</TABLE>

                                 Page 50

<PAGE>

NOTE T - CONDENSED FINANCIAL INFORMATION OF THE CORPORATION ONLY (continued)

Condensed Statements of Cash Flows
<TABLE>
                                                for the years ended
                                                     December 31,
                                           1997           1996        1995
CASH FLOWS FROM OPERATING ACTIVITIES:     -------        -------     -------
<S>                                        <C>            <C>          <C>
     Dividends Received From 
       Subsidiaries                        $3,915         $4,015      $3,730
     Interest Received                        187            130           7
     Income Tax Payments Received 
       From Subsidiaries                    4,286          4,445       3,373
     Income Taxes Paid                     (4,198)        (4,430)     (3,352)
     Paid to Suppliers                       (507)          (257)       (407)
                                            -----          -----       -----
          Net Cash Provided By 
            Operating Activities            3,683          3,903       3,351
                                           ------         ------      ------

CASH FLOWS FROM INVESTING ACTIVITIES:
     Purchase of Available-
       for-Sale Securities                   (500)        (2,029)     (1,669)
     Proceeds from Sales and Maturities 
       of Available-for-Sale Securities     1,200          1,050
     Investment in Subsidiary              (2,574)
     Other, Net                                               36         (24)
                                           ------         ------      ------
          Net Cash Used In Investing 
            Activities                     (1,874)          (943)     (1,693)
                                           ------         ------      ------
CASH FLOWS FROM FINANCING ACTIVITIES:
     Dividends Paid                        (2,689)        (2,478)     (1,970)
                                           ------         ------      ------
          Net Cash Used In 
            Financing Activities           (2,689)        (2,478)     (1,970)
                                           ------          ------      -----
          Net Increase (Decrease) in Cash 
               and Cash Equivalents          (880)           482        (312)
          Cash and Cash Equivalents at
                Beginning of Year           2,078          1,596       1,908
                                           ------         ------       -----
          Cash and Cash Equivalents 
            at End of Year                 $1,198         $2,078      $1,596
                                           ======          =====      ======
RECONCILIATION OF NET INCOME TO NET CASH PROVIDED
BY OPERATING ACTIVITIES:

     Net Income                            $9,594          $8,337     $8,756
     Adjustments to Reconcile 
       Net Income To Net Cash 
       Provided by Operating Activities:
               Equity In Undistributed 
               Net Income of Subsidiaries  (6,278)         (5,020)    (5,683)
               Goodwill Amortization          441             633        516
               Decrease in Taxes Payable      (69)            (68)      (180)
               (Increase) Decrease in 
                    Interest Receivable        16             (11)       (33)
               Other, Net                     (21)             32        (25)
                                            -----            -----     -----
          Total Adjustments                (5,911)          (4,434)   (5,405)
                                            ------           ------    -----
          Net Cash Provided By 
            Operating Activities           $3,683           $3,903    $3,351
                                            =====            =====    ======
</TABLE>

                                 Page 51

<PAGE>

REPORT OF INDEPENDENT ACCOUNTANTS

ERNST & YOUNG LLP

Report of Independent Accountants
Stockholders and Board of Directors
Old Second Bancorp, Inc. 

We have audited the accompanying consolidated balance sheets of Old Second
Bancorp, Inc. and Subsidiaries as of December 31, 1997 and 1996, and the
related consolidated statements of income, changes in stockholders' equity,
and cash flows for the three years in the period ended December 31, 1997.  
These financial statements are the responsibility of the Comapany's 
management.  Our responsibility is to express an opinion on these financial
statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards.  Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the finanial statements are free
of material misstatement.  An audit includes examining, on a test basis, 
evidence supporting the amounts and disclosures in the financial statements.
An audit also includes assessing the accounting principles used and 
significant estimates made by management, as well as evaluating the overall
financial statements presentation.  We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly,
in all material respects, the consolidated financial position of Old Second
Bancorp, Inc. and Subsidiaries as of December 31, 1997, and the consolidated
results of their operations and their cash flows for each of the three years
in the period ended December 31, 1997, in conformity with generally
accepted accounting principles.

                                          /s/ Ernst & Young LLP

January 16, 1998

10K REPORT
Copies of the Corporation's 1997 10K report filed with the Securities and 
Exchange Commission will be mailed to stockholders upon written request to: 
Ronald J. Carlson, President, Chief Financial Officer and Secretary, Old 
Second Bancorp, Inc., 37 South River Street, Aurora, Illinois 60506-4172.


There were 1,315 holders of record of the Corporation's Common Stock at year-
end 1997.


MARKET PRICE OF COMMON STOCK
The Corporation's Common Stock has been traded in the over-the-counter market 
on the NASDAQ National Market System under the symbol OSBC since November 
11, 1993.  The following table sets forth the range of bid and ask prices 
during each quarter for 1997 and 1996 as quoted by BLOOMBERG FINANCIAL 
MARKETS.  This information represents quotations and does not necessarily 
reflect actual transactions.
<TABLE>

                                   Bid                         Ask
                         ---------------------     ---------------------- 
1997                       High         Low           High         Low
- -------                  --------     -------       --------     --------
<S>                        <C>           <C>          <C>          <C>
First Quarter             $47.50       $40.75        $49.00       $41.50
Second Quarter             47.50        46.75         48.75        48.00
Third Quarter              50.50        46.75         52.75        48.50
Fourth Quarter             63.00        50.50         66.50        52.75

                                   Bid                          Ask     
1996                       High         Low            High         Low
                          --------     -------       -------     --------
First Quarter              $38.00       $36.00       $39.00       $36.50
Second Quarter              39.25        36.75        39.75        38.00
Third Quarter               39.25        38.50        39.50        39.00
Fourth Quarter              40.50        39.25        41.50        39.75


</TABLE>

The range of high and low closing sales prices of the Corporation's Common 
Stock as quoted on the NASDAQ National Market System from January 1, 1997 
through December 31, 1997 was $63.00 and $41.25, respectively.


                                 Page 52

<PAGE>

BOARD OF DIRECTORS
Old Second Bancorp, Inc. and Subsidiaries

Walter Alexander
President, Alexander Lumber Company
(lumber and building material sales)

James E. Benson
Chairman and Chief Executive Officer,
Old Second Bancorp, Inc.

Ronald J. Carlson
President, Chief Operating Officer, Chief Financial Officer, and Secretary, 
Old Second Bancorp, Inc. and Vice President/CFO, The Old Second National 
Bank of Aurora

Marvin Fagel
President, Aurora Packing Company and Chairman of the Board and CEO, New City 
Packing Company (a meat packing company)

Joanne Hansen
President, Furnas Foundation, Inc.

Kenneth Lindgren
President, Daco Incorporated
(contract manufacturer of machined components)

Jesse Maberry
Treasurer, Aurora Bearing Company
(manufacturer of rod end and spherical bearings)

Gary McCarter
Vice President, Farmers Group, Inc.
(insurance)

D. Chet McKee
President, Copley Memorial Hospital

William J. Meyer
President, William F. Meyer Company
(plumbing fixtures and supplies)

Larry A. Schuster
Chairman, Westside Mechanical, Inc.
(mechanical contractor)


William B. Skoglund
Vice President and Assistant Secretary, Old Second Bancorp, Inc., and 
President and Chief Executive Officer, The Old Second National Bank of Aurora

George Starmann III
Vice President, Old Second Bancorp, Inc. and Executive Vice President and 
Senior Trust Officer, The Old Second National Bank of Aurora


                                Page 53
<PAGE>

Directors Emeriti

John C. Dunham
Retired Chairman of the Board, Aurora Equipment Company

Vernon H. Haase
Retired Chairman, Henry Pratt Company

Urban Hipp
Retired, Barber-Greene Company

Dorothy E. McEnroe
Realtor, ReMax of Aurora

M.J. O'Brien
Retired Vice President and Secretary, Old Second Bancorp, Inc., and Retired 
Senior Vice President and Cashier, The Old Second National Bank of Aurora

Daniel J. Ruddy
President, Construction Advisory Services, Inc.

Ralph N. Schleifer
President, Fox Valley Dry Wall, Inc.

Edward Schmitt
President, Schmitt McDonalds

Townsend L. Way, Jr.
Retired President, Richards - Wilcox Mfg. Co.

Richard Westphal
Farmer

Directors Emeriti

John C. Dunham
Vernon H. Haase
Urban Hipp
Dorothy F. McEnroe
M. J. O'Brien
Daniel J. Ruddy
Ralph N. Schleifer
Edward Schmitt
Townsend L. Way, Jr.
Richard Westphal



                               Page 54
<PAGE>

CONSOLIDATING AND CONSOLIDATED BALANCE SHEET
(in thousands)
Old Second Bancorp, Inc. and Subsidiaries

at December 31, 1997
<TABLE>
                                    THE OLD
                          THE Old   SECOND     THE OLD            
                          SECOND    COMMUNITY  SECOND           
                          NATIONAL  BANK OF    COMMUNITY  YORKVILLE   
                          BANK OF   NORTH      BANK OF    NATIONAL  BURLINGTON
                          AURORA    AURORA     AURORA     BANK      BANK       
<S>                         <C>      <C>        <C>        <C>       <C>
ASSETS         
     Cash and Due From 
       Banks             $ 24,492   $ 1,659    $ 4,183     $ 4,683    $ 728
     Interest Bearing 
       Deposits with Banks    350                          
     Federal Funds Sold    31,390     2,475      2,375       3,800    1,625
                         ---------  ---------  --------    --------  --------
     Total Cash and 
       Cash Equivalents    56,232     4,134      6,558       8,483    2,353
     Investment 
       Securities         137,069    27,235     16,851      43,316    8,518
     Loans Held 
       for Sale
     Loans                324,196    22,968     20,123      84,583   23,509
          Less: Allowance 
            for Possible
            Loan Losses     3,681       373        316       1,055      345
          Less: Unearned 
            Income            342      
                          --------   --------- ---------   --------  --------
     Loans, Net           320,173    22,595     19,807      83,528    23,164
     Bank Premises and 
       Equipment, Net      12,502     1,454        593       1,382       444
     Other Assets           4,916       886        642       5,428       439
Investment in Subsidiaries
                          -------    ------     ------      -------    ------
TOTAL ASSETS             $530,892   $56,304    $44,451     $142,137   $34,918
                          ========  =======     ======      =======    ======
LIABILITIES
     Deposits
          Demand          $ 74,484  $ 7,048    $ 6,774     $ 13,548   $ 2,404   
          Savings          159,596   23,250     16,836       46,913    13,429 
          Time             220,997   19,200     14,999       65,027    15,080
                          --------  --------   --------     -------   -------
               Total 
                 Deposits  455,077   49,498     38,609      125,488    30,913
          Sec. Sold Under 
            Agreements to 
            Repurchase      17,379    2,308                   3,239  
          Other Short-Term 
            Borrowings       6,434               1,000          182       
          Notes Payable                                
          Other Liabilities  4,780       320       223        1,247       246
                             -----     ------    ------      ------     -----
TOTAL LIABILITIES          483,670     52,126    39,832     130,156    31,159

STOCKHOLDERS' EQUITY
          Common Stock       3,275        250       480         525       250
          Additional 
            Capital          4,125      1,598     1,420       2,025     1,250
          Retained 
            Earnings        39,120      2,252     2,608       9,197     2,198
          Net Unrealized 
            Gain on 
            Investments        702         78       111         234        61
                            ------      ------   -------     -------   ------
TOTAL STOCKHOLDERS' 
  EQUITY                    47,222      4,178     4,619       11,981    3,759
                           -------     ------    ------      -------  -------
TOTAL LIABILITIES AND
  STOCKHOLDERS' EQUITY    $530,892    $56,304   $44,451     $142,137  $34,918
                          ========    =======   =======      =======  =======
</TABLE>
                                  Page 55

<PAGE>
<TABLE>
                              KANE                         
                              COUNTY       BANK OF                 MAPLE PARK
                              BANK AND     SUGAR     MAPLE PARK    BANCSHARES,  
                              TRUST        GROVE     MORTGAGE      INC.
<S>                            <C>          <C>       <C>            <C>
ASSETS         
     Cash and Due From 
       Banks                  $ 3,701      $ 1,664   $ 3,351        $ 306
     Interest Bearing 
       Deposits with Banks                                       
     Federal Funds Sold         5,275
                              --------      -------   -------       -------
     Total Cash and Cash 
       Equivalents              8,976        1,664        351          306
     Investment Securities     17,074       12,317
     Loans Held for Sale                               26,541
     Loans                     35,451       24,150
          Less: Allowance 
           for Possible Loan 
           Losses                 705          448    
          Less: Unearned 
            Income                  6
                              -------       -------
     Loans, Net                34,740        23,702
     Bank Premises and 
       Equipment, Net           2,736         1,162       337
     Other Assets               1,269           996     3,107
     Investment in 
       Subsidiaries                                                 2,167
                              -------       -------   -------       -----
TOTAL ASSETS                 $ 64,795      $ 39,841  $ 30,336      $ 2,473
                              =======       =======   =======       =======
LIABILITIES
     Deposits
          Demand              $ 8,132       $ 4,328               
          Savings              30,456        13,967               
          Time                 18,426        15,779
                             ---------     --------
               Total 
                 Deposits      57,014        34,074
          Sec. Sold Under 
            Agreements             
            to Repurchase                           
          Other Short-Term 
            Borrowings            481           890        
          Notes Payable                              $ 24,133              
          Other Liabilities       550           461     3,842         $ 52
                               -------       -------   -------      -------
TOTAL LIABILITIES              58,045        35,425    27,975           52

STOCKHOLDERS' EQUITY
          Common Stock          1,000           260        10          466      
          Additional Capital    2,500         2,300                  1,752     
          Retained Earnings     3,159         1,789     2,351          203     
          Net Unrealized Gain                                  
                on Investments     91            67
                               -------       -------    -------      ------
TOTAL STOCKHOLDERS' EQUITY      6,750         4,416      2,361       2,421
                               ------        ------     ------      ------

TOTAL LIABILITIES AND
  STOCKHOLDERS' EQUITY       $ 64,795      $ 39,841   $ 30,336     $ 2,473     
                              =======       =======    =======      ======
</TABLE>
                                 Page 56

<PAGE>
<TABLE>
                                                               OLD
                                 OLD                           SECOND   
                                 SECOND                        BANCORP,
                                 BANCORP,     CONSOLIDATING    INC.
                                 INC.         ADJUSTMENTS      CONSOLIDATED    

<S>                              <C>          <C>               <C>
ASSETS         
     Cash and Due From Banks     $ 1,198      $ (2,340)        $ 40,625  
     Interest Bearing 
       Deposits with Banks                                          350       
     Federal Funds Sold                           (890)          46,050
                                  --------     --------         --------
     Total Cash and Cash 
       Equivalents                 1,198        (3,230)          87,025
     Investment Securities         2,087                        264,467
     Loans Held for Sale                           386           26,927
     Loans                                                      534,980
          Less: Allowance 
            for Possible 
            Loan Losses                                           6,923        
          Less: Unearned Income                                     348
                                                                --------  
     Loans, Net                                                 527,709
     Bank Premises and 
       Equipment, Net                              195           20,805
     Other Assets                   116          3,639           21,438
     Investment in Subsidiar     89,799        (91,966)
                                -------        -------         --------
TOTAL ASSETS                   $ 93,200      $ (90,976)       $ 948,371
                                ========      =========        ========
LIABILITIES
     Deposits
          Demand                               $(1,954)         $114,764       
          Savings                                  210           304,657      
          Time                                                   369,508
                                               ---------        --------
               Total Deposits                   (1,744)          788,929
          Sec. Sold Under 
            Agreements to 
            Repurchase                                            22,926
          Other Short-Term 
            Borrowings                            (890)            8,097
          Notes Payable                                           24,133   
          Other Liabilities     $ 1,079           (635)           12,165
                               ---------         -------          -------
TOTAL LIABILITIES                 1,079         (3,269)          856,250

STOCKHOLDERS' EQUITY
          Common Stock           15,844         (6,516)            15,844
          Additional Capital                   (16,970)
          Retained Earnings      74,924        (62,877)            74,924
          Net Unrealized Gain
            on Investments        1,353         (1,344)             1,353
                                --------       ---------          --------     
TOTAL STOCKHOLDERS' EQUITY       92,121        (87,707)            92,121
                                -------        -------            -------
TOTAL LIABILITIES AND
   STOCKHOLDERS' EQUITY         $93,200       $(90,976)          $948,371
                                =======       ========           ========
</TABLE>

                                 Page 57
<PAGE>


                                                        Exhibit 21.1

                 SUBSIDIARIES OF THE REGISTRANT

The subsidiaries of the registrant are as follows:

<TABLE>
 
                             Incorporated         Percentage of Voting
        Name                Under Laws of           Securities Owned
        ----                -------------         --------------------
<S>                             <C>                   <C>
The Old Second National
  Bank of Aurora               The United States             100%

The Old Second Community
  Bank of North Aurora         State of Illinois             100%

The Old Second Community
  Bank of Aurora               State of Illinois             100%

Yorkville National Bank        The United States             100%

Burlington Bank                State of Illinois             100%

Kane County Bank and
  Trust Company                State of Illinois             100%

Bank of Sugar Grove            State of Illinois             100%

Maple Park Bancshares, Inc.    State of Illinois             100%  

Maple Park Mortgage            State of Illinois             100%





                                 Page 58

<PAGE>

</TABLE>


                                                 Exhibit 23.1

                       CONSENT OF INDEPENDENT AUDITOR


We consent to the incorporation by reference in the Registration Statement
(Form S-8 No. 33-87722) pertaining to the Old Second Bancorp, Inc. Long-Term
Incentive Plan of our report dated January 16, 1998, with respect to the
consolidated financial statements of Old Second Bancorp, Inc. included in the
Annual Report (Form 10-K) for the year ended December 31, 1997.

We also consent to the incorporation by reference in the Registration 
Statement (Form S-3 No. 333-31049) pertaining to the registration of shares
of Old Second Bancorp, Inc. common stock received in the Maple Park
Bancshares, Inc. merger of our report dated January 16, 1998, with respect
to the consolidated financial statements of Old Second Bancorp, Inc. 
included in the Annual Report (Form 10-K) for the year ended December 31, 1997.

                                        /s/ Ernst & Young LLP

Chicago, Illinois
March 27, 1998


                               Page 59

<PAGE>


                                                  Exhibit 25.1

                     Report of Independent Accountants


The Stockholders and Board of Directors
Old Second Bancorp Inc.

We have audited the accompanying consolidated balance sheets of Old Second
Bancorp, Inc. and Subsidiaries as of December 31, 1997 and 1996, and the 
related consolidated statements of income, changes in stockholders' equity,
and cash flows for the three years in the period ended December 31, 1997.
These financial statements are the responsibility of the Company's 
management.  Our responsibility is to express an opinion on these financial
statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards.  Those standard require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free
of material misstatement.  An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements.
An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation.  We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly,
in all materail respects, the consolidated financial position of Old
Second Bancorp, Inc. and Subsidiaries as of December 31, 1997, and the
consolidated results of operations and their cash flows for each of the
three years in the period ended December 31, 1997, in conformity with
generally accepted accounting principles.

                                        /s/ Ernst & Young LLP

January 16, 1998

                              Page 60

<PAGE>

<TABLE> <S> <C>

<ARTICLE>   9
<MULTIPLIER>   1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                     DEC-31-1997
<PERIOD-END>                          DEC-31-1997
<CASH>                                      40625
<INT-BEARING-DEPOSITS>                        350
<FED-FUNDS-SOLD>                            46050
<TRADING-ASSETS>                                0
<INVESTMENTS-HELD-FOR-SALE>                264467
<INVESTMENTS-CARRYING>                          0
<INVESTMENTS-MARKET>                            0
<LOANS>                                    527709
<ALLOWANCE>                                  6923
<TOTAL-ASSETS>                             948371
<DEPOSITS>                                 788929
<SHORT-TERM>                                55156
<LIABILITIES-OTHER>                         12165
<LONG-TERM>                                     0
<COMMON>                                    15844
                           0
                                     0
<OTHER-SE>                                  76277
<TOTAL-LIABILITIES-AND-EQUITY>             948371
<INTEREST-LOAN>                             46422
<INTEREST-INVEST>                           16327
<INTEREST-OTHER>                             2429
<INTEREST-TOTAL>                            65178
<INTEREST-DEPOSIT>                          29595
<INTEREST-EXPENSE>                          31051
<INTEREST-INCOME-NET>                       34127
<LOAN-LOSSES>                                1256
<SECURITIES-GAINS>                              0
<EXPENSE-OTHER>                             33218
<INCOME-PRETAX>                             13612
<INCOME-PRE-EXTRAORDINARY>                   9594
<EXTRAORDINARY>                                 0
<CHANGES>                                       0
<NET-INCOME>                                 9594
<EPS-PRIMARY>                                3.15
<EPS-DILUTED>                                3.14
<YIELD-ACTUAL>                               4.14
<LOANS-NON>                                  2189
<LOANS-PAST>                                 1011
<LOANS-TROUBLED>                                0
<LOANS-PROBLEM>                              6911
<ALLOWANCE-OPEN>                             6968
<CHARGE-OFFS>                                1642 
<RECOVERIES>                                  341
<ALLOWANCE-CLOSE>                            6923
<ALLOWANCE-DOMESTIC>                         6923
<ALLOWANCE-FOREIGN>                             0
<ALLOWANCE-UNALLOCATED>                         0

        


</TABLE>


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