GREENSBURG, IN–(EMWNews – July 24, 2008) – MainSource Financial Group, Inc. (NASDAQ: MSFG) (the “Company”) today announced that Archie M. Brown, Jr. has agreed

to serve as the Company’s President and CEO, effective August 4, 2008. Mr.

Brown will also serve as a member of the Company’s Board of Directors.

Robert E. Hoptry, who has served as interim President and CEO since

February 8, 2008, will continue as Chairman of the Board, a position he has

held since 1983.

Hoptry commented, “Archie Brown is an extremely talented and experienced

banker who will bring a wealth of knowledge to MainSource. His proven

leadership is expected to be a driving force that will propel the

performance of the Company. Archie is the unanimous choice of the Board,

and we believe he is the ideal person to lead our highly qualified

executive team and a strong and dedicated workforce. We are pleased to

welcome him into our MainSource family and look forward to sharing our

vision of a community-focused banking organization with him.”

Mr. Brown, age 47, has served as Executive Vice President, Commercial and

Consumer Banking, of Integra Bank, N.A. since 2001. Integra Bank is the

multi-state banking subsidiary of Integra Bank Corporation, Evansville,

Indiana (NASDAQ: IBNK), which has assets totaling $3.4 billion. At Integra,

Mr. Brown was responsible for commercial, consumer and mortgage banking;

wealth management; information technology; and branch operations. Prior to

joining Integra, he served as an executive at U.S. Bank (formerly Firstar

Bank and Star Bank) for 11 years. He brings a total of 24 years of broadly

based banking experience to MainSource.

Brown stated, “I am extremely honored to be joining the MainSource family,

and I am very impressed with the leadership and vision of the Board and the

talent of the executive team. I look forward to working together with all

MainSource employees to continue to build on the Company’s strengths, in

particular its community bank focus.”

MainSource Financial Group, Inc. is a community-focused, financial services

holding company with assets exceeding $2.5 billion. The Company operates

77 banking offices through its three banking subsidiaries, MainSource Bank,

Greensburg, Indiana, MainSource Bank of Illinois, Kankakee, Illinois, and

MainSource Bank-Ohio, Troy, Ohio. The Company’s non-banking subsidiaries,

MainSource Insurance, LLC and MainSource Title, LLC, provide 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. Actual results and experience could differ

materially from the anticipated results or other expectations expressed in

the Company’s forward-looking statements. 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; changes in the quality or

composition of the Company’s loan and investment portfolios; the Company’s

ability to integrate acquisitions; the impact of our continuing acquisition

strategy; and other factors, including various “risk factors” as set forth

in our most recent Annual Report on Form 10-K and in other reports we file

from time to time with the Securities and Exchange Commission. These

reports are available publicly on the SEC website, www.sec.gov, and on the

Company’s website, www.mainsourcefinancial.com.