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): July 19, 2006

                        MainSource Financial Group, Inc.
             (Exact name of registrant as specified in its charter)

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

     [ ] Written communications pursuant to Rule 425 under the Securities Act
         (17 CFR 230.425)
     [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
         (17 CFR 240.14a-12)
     [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the
         Exchange Act (17 CFR 240.14d-2(b))
     [ ] 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 July 19, 2006,  MainSource  Financial Group, Inc.  announced by press release
its earnings and results of operations for the second quarter of 2006. 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

     (c) Exhibits

         99.1     Press Release of MainSource Financial Group, Inc.
                  dated July 19, 2006.


                                   SIGNATURES

     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, thereunto duly authorized.


                                    MAINSOURCE FINANCIAL GROUP, INC.

Date:    July 19, 2006              By:  /s/ James L. Saner, Sr.
                                         -------------------------------------
                                         James L. Saner, Sr.
                                         President and Chief Executive Officer