EXHIBIT 99.1



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                                  NEWS RELEASE


        DATE:     April 19, 2006     4:30 p.m. E.S.T.
        CONTACT:  James L. Saner, Sr., President and CEO
                  MainSource Fnancial Group, Inc.  812-663-0157


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                    MAINSOURCE FINANCIAL GROUP-NASDAQ, MSFG -
                  Announces Earnings for the First Quarter 2006



Greensburg,  Indiana  (NASDAQ:  MSFG)  James L.  Saner,  Sr.,  President & Chief
Executive Officer of MainSource  Financial Group,  announced today the unaudited
results  for the quarter  ended March 31,  2006.  The Company  reported  diluted
earnings per share of $0.35, which represents a 6.1% increase from the $0.33 per
share  reported in the first quarter of 2005. Net income was $4.8 million in the
first  quarter of 2006  compared to $3.8 million for the same period a year ago.
Key measures of the financial  performance  of the Company are return on average
shareholders'   equity  and  return  on  average   assets.   Return  on  average
shareholders'  equity was 11.83% for the first  quarter of 2006 while  return on
average  assets  was 1.17% for the same  period.  The  Company  consummated  its
acquisition of Union  Community  Bancorp in March 2006. This  acquisition  added
approximately $272 million in assets,  $218 million in loans and $179 million in
deposits.  The  $56  million  purchase  price  consisted  of  a  combination  of
approximately $27 million of cash and $29 million of MainSource stock.

Mr. Saner  stated,  "Our first  quarter  demonstrated  many  positives.  Our net
interest margin actually  improved  several basis points over the fourth quarter
of 2005 and  increased 14 basis  points over the same period last year.  This is
very positive for the Company. Non-interest income continued to increase and our
overall  efficiency ratio improved  considerably  over the same period of a year
ago.  While our  non-performing  assets as a percentage of total assets are down
more  than  10%  from  a  year  ago,  the  $17.4  million  is  still  too  high.
Unfortunately, our newest acquisition, Union Community Bancorp, had more than $3
million of non-performing assets which increased the overall amount considerably
in the last  couple of weeks of the  quarter.  The good news,  however,  is that
charge-offs are still very low and very comparable to last year."

Mr. Saner added, "While our merger and acquisition strategy continues to improve
our numbers and our earnings,  we continue to struggle with organic growth. When
you compare our total loans year over year  including the various  acquisitions,
the Company is maintaining  but not growing as we had hoped. We will continue to
emphasize  organic  growth  and we  believe  we  will  see the  benefits  of our
increased  sales  efforts  during  the rest of the  year.  All in all our  first
quarter was good.  The earnings were very solid and have laid the foundation for
improvement for the rest of the year."

NET INTEREST INCOME
- -------------------

Net  interest  income was $14.2  million  for the first  quarter of 2006,  which
represents an increase of 12.0% versus the first  quarter of 2005.  The increase
was due  primarily to the  acquisition  of The Madison  Bank and Trust  Company,
which  occurred in the third  quarter of 2005,  and an increase in the Company's
net interest margin.  Net interest margin, on a fully-taxable  equivalent basis,
was 4.04% for the first  quarter of 2006 versus 4.00% for the fourth  quarter of
2005 and 3.90% for the first quarter of 2005.


NON-INTEREST INCOME
- -------------------

The  Company's  non-interest  income  increased  to $4.9  million  for the first
quarter of 2006  compared to $4.6  million for the same period in 2005.  Service
charge income increased due primarily to the acquisition of Madison.  Offsetting
this  increase  was a decrease in insurance  commissions  due to the sale of the
Kentucky division of the Company's insurance subsidiary in March 2005.





NON-INTEREST EXPENSE
- --------------------

The  Company's  non-interest  expense was $12.4 million for the first quarter of
2006 compared to $12.1 million for the same period in 2005, an increase of 2.5%.
Increases  in  employee  costs,  occupancy  expenses,  equipment  expenses,  and
intangibles  amortization  were  primarily  attributable  to the  acquisition of
Madison and Union.  These increases were partially offset by a decrease in other
expenses due primarily to the cost savings derived from the consolidation of the
Company's Indiana banking charters. The Company's efficiency ratio was 63.0% for
the first quarter of 2006 compared to 68.4% for the same period a year ago.


ASSET QUALITY
- -------------

Non-performing  assets were $17.4 million as of March 31, 2006 compared to $16.6
million as of March 31, 2005 and represented  0.93% of total assets at March 31,
2006 versus 1.11% one year ago. Net  charge-offs  for the first  quarter of 2006
equaled  0.16% of  average  outstanding  loans  compared  to 0.14% for the first
quarter of 2005.  The Company's  allowance for loan losses as a percent of total
outstanding  loans  was  1.01%  as of March  31,  2006  compared  to 1.09% as of
December 31, 2005 and 1.28% as of March 31, 2005.





                                         MAINSOURCE FINANCIAL GROUP
                                                (unaudited)
                                    (Dollars in thousands except per share data)


Income Statement Summary                                                   Three months ended Mar.31
- ------------------------                                                   -------------------------
                                                                           2006                 2005
                                                                      ----------------    -----------------
                                                                                             
    Interest Income                                                           $22,655              $18,693
    Interest Expense                                                            8,421                5,988
                                                                      ----------------    -----------------
    Net Interest Income                                                        14,234               12,705
    Provision for Loan Losses                                                     360                  120
    Noninterest Income:
          Insurance commissions                                                   420                  587
          Mortgage banking                                                        580                  546
          Service charges on deposit accounts                                   1,851                1,666
          Gain/(losses) on sales of securities                                     61                   11
          Other                                                                 1,987                1,769
                                                                      ----------------    -----------------
               Total Noninterest Income                                         4,899                4,579
    Noninterest Expense:
          Employee                                                              7,405                6,876
          Occupancy                                                             1,058                  899
          Equipment                                                             1,134                1,030
          Intangible amortization                                                 421                  295
          Other                                                                 2,383                2,994
                                                                      ----------------    -----------------
               Total Noninterest Expense                                       12,401               12,094
    Earnings Before Income Taxes                                                6,372                5,070
    Provision for Income Taxes                                                  1,586                1,280
                                                                      ----------------    -----------------
    Net Income                                                         $        4,786      $         3,790
                                                                      ================    =================


Average Balance Sheet Data                                                 Three months ended Mar.31
- --------------------------                                                 -------------------------
                                                                           2006                 2005
                                                                      ----------------    -----------------
    Gross Loans                                                              $990,602             $920,849
    Earning Assets                                                          1,484,692            1,363,575
    Total Assets                                                            1,654,013            1,512,547
    Noninterest Bearing Deposits                                              153,493              135,655
    Interest Bearing Deposits                                               1,174,357            1,066,509
    Total Interest Bearing Liabilities                                      1,477,551            1,240,976
    Shareholders' Equity                                                      164,046              124,185





                                                                           Three months ended Mar.31
                                                                           -------------------------
Per Share Data                                                             2006                 2005
- --------------                                                        ----------------    -----------------
    Diluted Earnings Per Share                                                  $0.35                $0.33
    Cash Dividends Per Share                                                    0.135                0.130
    Market Value - High                                                         19.50                23.96
    Market Value - Low                                                          17.55                20.96

    Average Outstanding Shares (diluted)                                 13,728,971           11,527,575


                                                                           Three months ended Mar.31
                                                                           -------------------------
Key Ratios                                                                 2006                 2005
- ----------                                                            ----------------    -----------------
    Return on Average Assets                                                    1.17%                1.02%
    Return on Average Equity                                                   11.83%               12.38%
    Net Interest Margin                                                         4.04%                3.90%
    Efficiency Ratio                                                           62.97%               68.39%
    Net Overhead to Average Assets                                              1.84%                2.01%


Balance Sheet Highlights
- ------------------------
As of March 31                                                             2006                 2005
                                                                      ----------------    -----------------
    Total Loans (Excluding Loans Held for Sale)                            $1,169,961             $901,312
    Allowance for Loan Losses                                                  11,804               11,505
    Total Securities                                                          464,016              428,831
    Goodwill and Intangible Assets                                             85,583               45,445
    Total Assets                                                            1,878,259            1,488,804
    Noninterest Bearing Deposits                                              159,542              147,181
    Interest Bearing Deposits                                               1,305,201            1,044,832
    Other Borrowings                                                          206,950              164,446
    Shareholders' Equity                                                      191,661              121,295


Other Balance Sheet Data
- ------------------------
As of March 31                                                             2006                 2005
                                                                      ----------------    -----------------
    Book Value Per Share                                                       $12.74               $10.57
    Loan Loss Reserve to Loans                                                  1.01%                1.28%
    Nonperforming Assets to Total Assets                                        0.93%                1.11%

    Outstanding Shares                                                   15,049,838           11,471,128


Asset Quality
- -------------
As of March 31                                                             2006                 2005
                                                                      ----------------    -----------------
    Loans Past Due 90 Days or More and Still Accruing                          $1,226               $2,425
    Non-accrual Loans                                                          11,851               13,129
    Other Real Estate Owned                                                     4,356                1,008
                                                                      ----------------    -----------------
    Total Nonperforming Assets                                                $17,433              $16,562

    Net Charge-offs                                                              $407                 $313
    Net Charge-offs as a % of average loans                                     0.16%                0.14%






MainSource  Financial  Group,  Inc.,  headquartered in Greensburg,  Indiana,  is
listed on the  NASDAQ  National  Market  (under  the  symbol:  "MSFG")  and is a
community-focused,  financial holding company with assets of approximately  $1.9
billion.  The Company operates 60 offices in 27 Indiana counties and six offices
in three Illinois  counties through its three banking  subsidiaries,  MainSource
Bank, Greensburg,  Indiana, MainSource Bank of Illinois, Kankakee, Illinois, and
MainSource  Bank  -  Crawfordsville,   Crawfordsville,   Indiana.   Through  its
non-banking  subsidiaries,  MainSource  Insurance LLC, MainSource Title LLC, and
MainSource  Mortgage  LLC,  the  Company and its  banking  subsidiaries  provide
various related financial services.


Forward-Looking  Statements Except for historical  information contained herein,
the  discussion  in this  press  release  may  include  certain  forward-looking
statements based upon management expectations.  Factors which could cause future
results to differ  materially  from these  expectations  include the  following:
general economic conditions;  legislative and regulatory  initiatives;  monetary
and fiscal  policies  of the federal  government;  deposit  flows;  the costs of
funds;   general   market  rates  of  interest;   interest  rates  on  competing
investments; demand for loan products; demand for financial services; changes in
accounting policies or guidelines;  changes in the quality or composition of the
Company's  loan and  investment  portfolios;  and the  impact of our  continuing
acquisition strategy.