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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>
  
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  <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;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of Report (date of earliest event
  reported):<b> May&nbsp;19, 2008</b></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="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>
  
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    <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 .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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>
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    <td width="32%" valign="top" style="padding:0in .7pt 0in .7pt;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;">State or Other Jurisdiction of</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;">Incorporation or Organization</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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 .7pt 0in .7pt;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>
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  <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</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;">Greensburg, IN &nbsp;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,</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;">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;">&#160;(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>
  
  <table border="0" cellspacing="0" cellpadding="0" width="93%" style="border-collapse:collapse;margin-left:.5in;width:93.0%;">
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    <td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p></td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p></td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.68%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)</font></p></td>
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    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p></td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.68%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p></td>
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    <td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p></td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p></td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.68%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></p></td>
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    <td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p></td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p></td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.68%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p></td>
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    <td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p></td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p></td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.68%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17 CFR 240.14d-2(b))</font></p></td>
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    <td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p></td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p></td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.68%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p></td>
   </tr>
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    <td width="3%" valign="top" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p></td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.66%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p></td>
    <td width="92%" valign="top" style="padding:0in .7pt 0in .7pt;width:92.68%;"><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act (17 CFR 240.13e-4(c))</font></p></td>
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  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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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>
  
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  <p style="margin:0in 0in .0001pt;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>
  
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  <!-- SEQ.=1,FOLIO='',FILE='C:\JMS\Vmeane\08-15212-1\task2957315\15212-1-ba.htm',USER='vmeane',CD='May 23 10:21 2008' -->
  
  
  
  <br clear="all" style="page-break-before:always;">
  <div style="font-family:Times New Roman;">
  
  <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;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 5.03&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Amendments to Articles of Incorporation or Bylaws;
  Change in Fiscal Year</font></b></p>
  
  <p style="margin:0in 0in .0001pt 1.0in;text-autospace:none;text-indent:-1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On May&nbsp;19, 2008, the Board of Directors of the MainSource Financial Group,&nbsp;Inc. (the &#147;Company&#148;) approved an amendment to section 3.14 of the Company&#146;s Bylaws to clarify the procedure for nominating directors.&#160; Specifically, the amendment clarifies that the nominating committee recommends a slate of management nominees to the Board and the Board selects the management nominees for election.</font></p><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p><p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The text of this amendment, which became effective immediately, is included as Exhibit&nbsp;3.1 to this Current Report on Form&nbsp;8-K and is incorporated herein by reference.&nbsp; A complete copy of the Company&#146;s Bylaws, as amended, will be filed as Exhibit&nbsp;3.1 to the Company&#146;s report on Form&nbsp;10-Q for the period ended June&nbsp;30, 2008.</font></p><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt 1.0in;text-autospace:none;text-indent:-1.0in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 7.01</font></b><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><b><font size="2" style="font-size:10.0pt;font-weight:bold;">Regulation FD Disclosure</font></b></p>
  
  <p style="margin:0in 0in .0001pt 1.0in;text-autospace:none;text-indent:-1.0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On May&nbsp;23, 2008, MainSource Financial Group,&nbsp;Inc. issued a press release announcing that its Board of Directors had declared a quarterly dividend of $.145 per share payable on June&nbsp;16, 2008 to common shareholders of record as of June&nbsp;6, 2008.&#160; The press release is attached as an exhibit to this Report and is being furnished pursuant to this Item 7.01 as Exhibit&nbsp;99.1 to this Report.</font></p><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 9.01&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Financial
  Statements and Exhibits.</font></b></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;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Exhibits</font></p><p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
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    <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;">Exhibit&nbsp;No.</font></b></p>
    </td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.72%;">
    <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:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
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    <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;">Description</font></b></p>
    </td>
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    <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;">3.1</font></p>
    </td>
    <td width="3%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:3.72%;">
    <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="border:none;padding:0in .7pt 0in .7pt;width:86.38%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Amendment
    to Bylaws of MainSource Financial Group,&nbsp;Inc., as adopted May&nbsp;19,
    2008</font></p>
    </td>
   </tr>
   <tr>
    <td width="9%" valign="top" style="padding:0in .7pt 0in .7pt;width:9.9%;">
    <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="bottom" style="padding:0in .7pt 0in .7pt;width:3.72%;">
    <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 .7pt 0in .7pt;width:86.38%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">MainSource
    Financial Group,&nbsp;Inc.&#146;s press release dated</font><font size="2" style="font-size:10.0pt;">  </font><font size="2" style="font-size:10.0pt;">May&nbsp;23, 2008</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;"><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\Vmeane\08-15212-1\task2957315\15212-1-bc.htm',USER='vmeane',CD='May 23 10:27 2008' -->
  
  
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  <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>
  
  <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, thereunto 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="30%" valign="top" style="padding:0in .7pt 0in .7pt;width:30.22%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">DATE:
    May&nbsp;23, 2008</font></p>
    </td>
    <td width="23%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:23.1%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="46%" valign="top" style="padding:0in .7pt 0in .7pt;width:46.68%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">MAINSOURCE FINANCIAL GROUP, INC.</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="30%" valign="top" style="padding:0in .7pt 0in .7pt;width:30.22%;">
    <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="23%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:23.1%;">
    <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="46%" valign="top" style="padding:0in .7pt 0in .7pt;width:46.68%;">
    <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="30%" valign="top" style="padding:0in .7pt 0in .7pt;width:30.22%;">
    <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="23%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:23.1%;">
    <p style="margin:0in 0in .0001pt;text-autospace:none;"><u><font size="2" face="Times New Roman" style="font-size:1.0pt;"><font style="text-decoration:none;">&nbsp;</font></font></u></p>
    </td>
    <td width="46%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in .7pt 0in .7pt;width:46.68%;">
    <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="30%" valign="top" style="padding:0in .7pt 0in .7pt;width:30.22%;">
    <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="23%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:23.1%;">
    <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="46%" valign="top" style="border:none;padding:0in .7pt 0in .7pt;width:46.68%;">
    <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="30%" valign="top" style="padding:0in .7pt 0in .7pt;width:30.22%;">
    <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="23%" valign="bottom" style="padding:0in .7pt 0in .7pt;width:23.1%;">
    <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="46%" valign="top" style="padding:0in .7pt 0in .7pt;width:46.68%;">
    <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;"><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>
  
  <div style="margin:0in 0in .0001pt;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
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metadata_documents: [{"type": "8-K", "sequence": "1", "filename": "a08-15212_18k.htm", "description": "8-K", "secsgml_size_bytes": 29381}]
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": "08858224"}, "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):
  May 19, 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, IN  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 5.03               Amendments to Articles of Incorporation or Bylaws;
  Change in Fiscal Year
  On May 19, 2008, the Board of Directors of the MainSource Financial Group, Inc. (the "Company") approved an amendment to section 3.14 of the Company's Bylaws to clarify the procedure for nominating directors.  Specifically, the amendment clarifies that the nominating committee recommends a slate of management nominees to the Board and the Board selects the management nominees for election.
  The text of this amendment, which became effective immediately, is included as Exhibit 3.1 to this Current Report on Form 8-K and is incorporated herein by reference.  A complete copy of the Company's Bylaws, as amended, will be filed as Exhibit 3.1 to the Company's report on Form 10-Q for the period ended June 30, 2008.
  Item 7.01
  Regulation FD Disclosure
  On May 23, 2008, MainSource Financial Group, Inc. issued a press release announcing that its Board of Directors had declared a quarterly dividend of $.145 per share payable on June 16, 2008 to common shareholders of record as of June 6, 2008.  The press release is attached as an exhibit to this Report and is being furnished pursuant to this Item 7.01 as Exhibit 99.1 to this Report.
  Item 9.01               Financial
  Statements and Exhibits.
  (d)               Exhibits
  Exhibit No.
  Description
  3.1
  Amendment
    to Bylaws of MainSource Financial Group, Inc., as adopted May 19,
    2008
  99.1
  MainSource
    Financial Group, Inc.'s press release dated
  May 23, 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, thereunto duly authorized.
  DATE:
    May 23, 2008
  MAINSOURCE FINANCIAL GROUP, INC.
  /s/
    Robert E. Hoptry
  Robert
    E. Hoptry
  President
    and Chief Executive Officer
  3