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<title>Prepared By R.R. Donnelley Financial -- Form 8-K</title>
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<b>UNITED STATES </b></font></div>

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<b>SECURITIES AND EXCHANGE COMMISSION </b></font></div>

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<b>Washington D.C., 20549 </b></font></div>

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<b>Form 8-K </b></font></div> <div><font Size="1">&nbsp;</font></div>

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<b>Current Report </b></font></div>

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<b>Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 </b></font></div>

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<b>Date Of Report (Date Of Earliest Event Reported):&nbsp;&nbsp;09/13/2005 </b></font></div>




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<b>MIDWESTONE FINANCIAL GROUP INC </b></font></div>

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<b>(Exact Name of Registrant as Specified in its Charter)</b></font></div>

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<b>Commission File Number:&nbsp;&nbsp;000-24630</b></font></div>

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<div Align="center"><font Face="times New Roman" Size="3" Color="#000000"><b>IA</b></font>
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<b>(State or Other Jurisdiction of</b></font>
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<div Align="center"><font Face="times New Roman" Size="2" Color="#000000"><b>(I.R.S. Employer</b></font>
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<b>Incorporation or Organization)</b></font>
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<b>Identification No.)</b></font>
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<b>222 First Avenue East, Oskaloosa, IA 52577</b></font></div>


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<b>(Address of Principal Executive Offices, Including Zip Code)</b></font>
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<b>641-673-8448 </b></font>
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<b>(Registrant&#146;s Telephone Number, Including Area Code) </b></font>
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<b> </b></font>
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<b>(Former name or former address, if changed since last report) </b></font>
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<b>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:<BR><BR>
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<b>[&nbsp;&nbsp;]&nbsp;&nbsp;
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<BR><BR>

[&nbsp;&nbsp;]&nbsp;&nbsp;
Soliciting material pursuant to Rule 14a-12 under the Exchange Act(17CFR240.14a-12)<BR><BR>


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Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act(17CFR240.14d-2(b))<BR><BR>


[&nbsp;&nbsp;]&nbsp;&nbsp;
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17CFR240.13e-4(c))
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Items to be Included in this Report</b>
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<b>Item 8.01.&nbsp;&nbsp;&nbsp;&nbsp;Other Events</b></font>
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On September 9, 2005, the Company announced that it had acquired Cook & Son Agency, Inc., an insurance agency located in Pella, Iowa. A copy of the news release issued by the Company is provided as Exhibit 99.1.</font>
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<b>Item 9.01.&nbsp;&nbsp;&nbsp;&nbsp;Financial Statements and Exhibits</b></font>
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(c) Exhibits<p>99.1 Company News Release dated September 9, 2005.</font>
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<b>Signature(s) </b></font>
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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>
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	MIDWESTONE FINANCIAL GROUP INC</font>
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	Date: September 13, 2005.</font>
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	By:</font>
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	/s/&nbsp;&nbsp;&nbsp;&nbsp;David A. Meinert</font>
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	David A. Meinert</font>
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	<div><font Face="times New Roman" Size="2" Color="#000000">Executive Vice President & Chief Financial Officer</font>
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<b>Exhibit Index </b></font>
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	<b>Exhibit&nbsp;No.</b></font>
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	<b>Description</b></font>
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	EX-99.1</font>
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	Company News Release dated September 9, 2005</font>
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{"company-data": {"conformed-name": "MIDWESTONE FINANCIAL GROUP INC", "cik": "0000741390", "assigned-sic": "6022", "irs-number": "421003699", "state-of-incorporation": "IA", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-24630", "film-number": "051083045"}, "business-address": {"street1": "P.O. BOX 1104", "city": "OSKALOOSA", "state": "IA", "zip": "52577", "phone": "5156738448"}, "mail-address": {"street1": "PO BOX 1104", "city": "OSKALOOSA", "state": "IA", "zip": "52577"}, "former-company": {"former-conformed-name": "MAHASKA INVESTMENT CO", "date-changed": "19940726"}}
Prepared By R.R. Donnelley Financial -- Form 8-K
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):  09/13/2005
MIDWESTONE FINANCIAL GROUP INC
(Exact Name of Registrant as Specified in its Charter)
Commission File Number:  000-24630
IA
42-1003699
(State or Other Jurisdiction of
(I.R.S. Employer
Incorporation or Organization)
Identification No.)
222 First Avenue East, Oskaloosa, IA 52577
(Address of Principal Executive Offices, Including Zip Code)
641-673-8448
(Registrant's Telephone Number, Including Area Code)
(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(17CFR240.14a-12)
[  ]  
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act(17CFR240.14d-2(b))
[  ]  
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act(17CFR240.13e-4(c))
Items to be Included in this Report
Item 8.01.    Other Events
On September 9, 2005, the Company announced that it had acquired Cook & Son Agency, Inc., an insurance agency located in Pella, Iowa. A copy of the news release issued by the Company is provided as Exhibit 99.1.
Item 9.01.    Financial Statements and Exhibits
(c) Exhibits
99.1 Company News Release dated September 9, 2005.
Signature(s)
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.
MIDWESTONE FINANCIAL GROUP INC
Date: September 13, 2005.
By:
/s/    David A. Meinert
David A. Meinert
Executive Vice President & Chief Financial Officer
Exhibit Index
Exhibit No.
Description
EX-99.1
Company News Release dated September 9, 2005