UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT PURSUANT

TO SECTION 13 OR 15(D) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (date of earliest event reported): October 24, 2007

MainSource Financial Group, Inc.

(Exact name of registrant as specified in its charter)

Indiana	0-12422	35-1562245
State or Other Jurisdiction of Incorporation or Organization	Commission File No.	I.R.S. Employer Identification Number

201 North Broadway

Greensburg, Indiana 47240

(Address of principal executive offices)

(812) 663-0157

(Registrant’s Telephone Number,

Including Area Code)

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act
(17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c))

Item 2.02 Results of Operations and Financial Condition

On October 24, 2007, MainSource Financial Group, Inc. announced by press release its earnings and results of operations for the third quarter of 2007. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and incorporated by reference herein.

The information in this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

	Exhibit Number		Description

	99.1		Press Release of Mainsource Financial Group, Inc. dated October 24, 2007.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	DATE: October 24, 2007	MAINSOURCE FINANCIAL GROUP, INC.

		/s/ James L. Saner, Sr.
		James L. Saner, Sr.,
		President and Chief Executive Officer

EXHIBIT INDEX

	Exhibit Number		Description

	99.1		Press Release of Mainsource Financial Group, Inc. dated October 24, 2007.