EXHIBIT 99.1


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                                  NEWS RELEASE

        DATE:      May 15, 2006          1:00 p.m. E.S.T.
        CONTACT:   James L. Saner, Sr., President and CEO
                   MainSource Financial Group, Inc.  812-663-0157

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                        Second Quarter Dividend Declared
                    MainSource Financial Group - NASDAQ, MSFG


Greensburg,  Indiana  (NASDAQ:  MSFG) - MainSource  Financial  Group's  Board of
Directors  announced  today that the Company  declared a second  quarter  common
dividend of $.14 per share at its May 12, 2006 meeting.  The dividend is payable
on June 12,  2006 to  common  shareholders  of record  as of May 22,  2006.  The
dividend represents an 8% increase over the dividend paid to shareholders in the
second  quarter last year.  This is  MainSource  Financial  Group's  sixty-third
consecutive quarterly cash dividend.

MainSource Bank, Greensburg, Indiana, is a wholly-owned subsidiary of MainSource
Financial  Group,   Inc.,  a   community-focused,   financial   holding  company
headquartered in Greensburg,  Indiana.  MainSource  Financial Group is listed on
the  NASDAQ  National  Market  (under  the  symbol:   "MSFG"),   has  assets  of
approximately  $1.9 billion and  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 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;  and changes in the
quality or composition of the Company's loan and investment portfolios.

The forward-looking statements included in the press release relating to certain
matters  involve  risks  and  uncertainties,   including  anticipated  financial
performance,  business  prospects,  and other  similar  matters,  which  reflect
management's best judgment based on factors currently known.  Actual results and
experience  could  differ  materially  from  the  anticipated  results  or other
expectations expressed in the Company's  forward-looking  statements as a result
of a number of factors,  including  but not limited to,  those  discussed in the
press release.

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 MainSource Financial Group, 201 N. Broadway, P.O. Box 87, Greensburg, IN 47240