content: <html>
  
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  <p style="border:none;margin:0in 0in .0001pt;padding:0in;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED
  STATES</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES
  AND EXCHANGE COMMISSION</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington, D.C. 20549</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM&nbsp;8-K</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT
  REPORT PURSUANT</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">TO
  SECTION&nbsp;13 OR 15(D)&nbsp;OF THE</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">SECURITIES
  EXCHANGE ACT OF 1934</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Date of Report (date of earliest event reported): April&nbsp;22,
  2008</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">MainSource
  Financial Group,&nbsp;Inc.</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of registrant as specified in its charter)</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div align="center">
  
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    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Indiana</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">0-12422</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">35-1562245</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman"><font style="font-size:10.0pt;">State or Other Jurisdiction of</font>  </font>Incorporation or <br>
    Organization</p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Commission File No.</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">I.R.S. Employer <br>
    Identification Number</font></p>
    </td>
   </tr>
  </table>
  
  </div>
  
  <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">2105 N. State Road 3 Bypass<br>
  Greensburg, Indiana 47240</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of principal executive offices)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(812) 663-6734</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Registrant&#146;s Telephone Number,<br>
  Including Area Code)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">N/A</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Former Name or Former Address, if Changed Since Last Report)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:ideograph-numeric ideograph-other;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;text-indent:20.15pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box below if the Form&nbsp;8-K filing is intended
  to simultaneously satisfy the filing obligation of the registrant under any of
  the following provisions:</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:ideograph-numeric ideograph-other;text-indent:20.15pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt 1.0in;text-indent:-.5in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)</font></p><p style="font-size:10.0pt;margin:0in 0in .0001pt 1.0in;text-indent:-.5in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></p><p style="font-size:10.0pt;margin:0in 0in .0001pt 1.0in;text-indent:-.5in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17 CFR 240.14d-2(b))</font></p><p style="font-size:10.0pt;margin:0in 0in .0001pt 1.0in;text-indent:-.5in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font face="Times New Roman">&nbsp;&nbsp;&nbsp;&nbsp;Pre-commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act (17 CFR 240.13e-4(c))</font></p>
  
  <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0in 0in 0in 0in;">
  
  <p style="border:none;margin:0in 0in .0001pt;padding:0in;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div style="margin:0in 0in .0001pt;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='',FILE='C:\JMS\105534\08-12061-1\task2880964\12061-1-ba.htm',USER='105534',CD='Apr 22 15:06 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div style="font-family:Times New Roman;">
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Item
  2.02&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Results of Operations
  and Financial Condition</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:37.4pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On
  April&nbsp;22, 2008, MainSource Financial Group,&nbsp;Inc. announced by press
  release its earnings and results of operations for the first quarter of 2008.&#160; A copy of the press release is attached as Exhibit&nbsp;99.1
  to this Current Report on Form&nbsp;8-K and incorporated by reference herein.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:37.4pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:37.4pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The
  information in this Current Report on Form&nbsp;8-K, including Exhibit&nbsp;99.1,
  shall not be deemed &#147;filed&#148; for purposes of Section&nbsp;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.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:37.4pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Item
  9.01&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Financial Statements
  and Exhibits.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)&#160;&#160;&#160;&#160;&#160;&#160;&#160; Exhibits</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="85%" style="border-collapse:collapse;margin-left:1.0in;width:85.0%;">
   <tr>
    <td width="9%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:9.58%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit <br>
    Number</font></b></p>
    </td>
    <td width="4%" valign="bottom" style="padding:0in 0in 0in 0in;width:4.38%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="86%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:86.04%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="9%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:9.58%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="bottom" style="padding:0in 0in 0in 0in;width:4.38%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="86%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:86.04%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="9%" valign="top" style="padding:0in 0in 0in 0in;width:9.58%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
    </td>
    <td width="4%" valign="bottom" style="padding:0in 0in 0in 0in;width:4.38%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="86%" valign="top" style="padding:0in 0in 0in 0in;width:86.04%;">
    <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman"><font style="font-size:10.0pt;">Press
    Release of Mainsource Financial Group,&nbsp;Inc. dated</font>  </font>April&nbsp;22, 2008.</p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>
  
  <div style="margin:0in 0in .0001pt;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='2',FILE='C:\JMS\105534\08-12061-1\task2880964\12061-1-ba.htm',USER='105534',CD='Apr 22 15:06 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div style="font-family:Times New Roman;">
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SIGNATURE</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">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.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
    <p style="margin:0in 0in .0001pt .5in;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">DATE:
    April&nbsp;22, 2008</font></p>
    </td>
    <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.74%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">MAINSOURCE
    FINANCIAL GROUP, INC.</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.74%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="49%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:49.74%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/
    Robert E. Hoptry</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="49%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:49.74%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Robert
    E. Hoptry,</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.26%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="49%" valign="top" style="padding:0in 0in 0in 0in;width:49.74%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">President
    and Chief Executive Officer</font></p>
    </td>
   </tr>
  </table>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><u><font size="2" face="Times New Roman" style="font-size:10.0pt;">EXHIBIT INDEX</font></u></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="85%" style="border-collapse:collapse;margin-left:1.0in;width:85.0%;">
   <tr>
    <td width="8%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:8.2%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Exhibit <br>
    Number</font></b></p>
    </td>
    <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.58%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="88%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:88.2%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="8%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:8.2%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.58%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="88%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:88.2%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="8%" valign="top" style="padding:0in 0in 0in 0in;width:8.2%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
    </td>
    <td width="3%" valign="top" style="padding:0in 0in 0in 0in;width:3.58%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="88%" valign="top" style="padding:0in 0in 0in 0in;width:88.2%;">
    <p style="font-size:10.0pt;margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman"><font style="font-size:10.0pt;">Press
    Release of Mainsource Financial Group,&nbsp;Inc. dated</font>  </font>April&nbsp;22, 2008.</p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3</font></p>
  
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metadata_filer: {"company-data": {"conformed-name": "MAINSOURCE FINANCIAL GROUP", "cik": "0000720002", "assigned-sic": "6022", "irs-number": "351562245", "state-of-incorporation": "IN", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-12422", "film-number": "08769357"}, "business-address": {"street1": "201 N BROADWAY", "street2": "PO BOX 87", "city": "GREENSBURG", "state": "IN", "zip": "47240", "phone": "8126630157"}, "mail-address": {"street1": "201 NORTH BROADWAY", "street2": "P O BOX 87", "city": "GREENSBURG", "state": "IN", "zip": "47240"}, "former-company": {"former-conformed-name": "INDIANA UNITED BANCORP", "date-changed": "19920703"}}
text: 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): April 22,
  2008
  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
  2105 N. State Road 3 Bypass
  Greensburg, Indiana 47240
  (Address of principal executive offices)
  (812) 663-6734
  (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
  April 22, 2008, MainSource Financial Group, Inc. announced by press
  release its earnings and results of operations for the first quarter of 2008.  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
  April 22, 2008.
  2
  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:
    April 22, 2008
  MAINSOURCE
    FINANCIAL GROUP, INC.
  /s/
    Robert E. Hoptry
  Robert
    E. Hoptry,
  President
    and Chief Executive Officer
  EXHIBIT INDEX
  Exhibit
  Number
  Description
  99.1
  Press
    Release of Mainsource Financial Group, Inc. dated
  April 22, 2008.
  3