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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">UNITED STATES</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">SECURITIES AND EXCHANGE COMMISSION</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">WASHINGTON, D.C. 20549</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">FORM 8-K</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">CURRENT REPORT</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">PURSUANT TO SECTION 13 OR 15(d) OF THE</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">SECURITIES EXCHANGE ACT OF 1934</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD NOWRAP STYLE="width: 30%; font-size: 10pt; layout-grid-mode: line">Date of report (Date of earliest event reported)</TD>
    <TD NOWRAP STYLE="width: 70%; border-bottom: windowtext 1pt solid; font-size: 10pt; layout-grid-mode: line; padding-left: 0.24in">April 12, 2012</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 100%; border-bottom: windowtext 1pt solid; font-size: 10pt; layout-grid-mode: line; text-align: center">Commercial Bancshares, Inc.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-left: 0; font-size: 10pt; layout-grid-mode: line; text-align: center">(Exact Name of Registrant as Specified in Charter)</TD></TR>
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    <TD STYLE="width: 35%; border-bottom: windowtext 1pt solid; padding-left: 0; layout-grid-mode: line; text-align: center">Ohio</TD>
    <TD STYLE="width: 4%; layout-grid-mode: line; text-align: center; border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="width: 28%; border-bottom: windowtext 1pt solid; layout-grid-mode: line; text-align: center">0-27894</TD>
    <TD STYLE="width: 4%; layout-grid-mode: line; text-align: center; border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="width: 29%; border-bottom: windowtext 1pt solid; layout-grid-mode: line; text-align: center">34-1787239</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="layout-grid-mode: line; text-align: center">(State or Other Jurisdiction</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">(Commission</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">(IRS Employer</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-left: 0; layout-grid-mode: line; text-align: center">Of Incorporation)</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">File Number)</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">Identification No.)</TD></TR>
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    <TD STYLE="width: 70%; border-bottom: windowtext 1pt solid; padding-left: 0; text-align: center">118 South Sandusky Avenue, Upper Sandusky, Ohio</TD>
    <TD STYLE="width: 10%; layout-grid-mode: line; text-align: center; border-bottom: Black 1pt solid">&nbsp;</TD>
    <TD STYLE="width: 20%; border-bottom: windowtext 1pt solid; layout-grid-mode: line; text-align: center">43351</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="layout-grid-mode: line; text-align: center">(Address of Principal Executive Offices)</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">(Zip Code)</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<TR STYLE="vertical-align: top">
    <TD NOWRAP STYLE="width: 30%; layout-grid-mode: line">Registrant&rsquo;s telephone number, including area code&nbsp;&nbsp;</TD>
    <TD NOWRAP STYLE="width: 70%; border-bottom: windowtext 1pt solid; layout-grid-mode: line; padding-left: 0.24in">(419) 294-5781</TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(Former Name or Former Address, if Changed Since Last Report)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">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
(see General Instruction A.2. below):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&uml;</FONT> Written communications
pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT> Soliciting material
pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT> Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT> Pre-commencement
communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>Item 5.02 - Departure of Directors or Certain Officers; Election
of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Director Richard A. Sheaffer will reach
the Board&rsquo;s mandatory retirement age of 70 prior to the Board&rsquo;s May, 2012 meeting and retired, effective after the
Board&rsquo;s regularly scheduled meeting held on April 12, 2012. Mr. Sheaffer was originally elected as a member of the Board
of Directors on August 6, 1976. He was elected as Chairman of the board in January 1990, and served in that capacity until April
2007.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>Item 8.01 &ndash; Other Events.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Effective April 12, 2012, the Company&rsquo;s
Board of Directors, by a unanimous resolution adopted on March 8, 2012, set the number of directors at ten. This reduction in the
number of directors, which had previously been set at eleven, coincided with the retirement of Richard A. Sheaffer. The Board of
Directors believes that reducing the number of directors at this time compliments its commitment to streamline the management function.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SIGNATURES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">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.</P>

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    <TD STYLE="width: 49%; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="width: 41%; border-bottom: windowtext 1pt solid; layout-grid-mode: line; text-align: center">Commercial Bancshares, Inc.</TD>
    <TD STYLE="width: 10%; layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line; text-align: center">(Registrant)</TD>
    <TD STYLE="layout-grid-mode: line">&nbsp;</TD></TR>
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    <TD STYLE="width: 4%; layout-grid-mode: line">Date</TD>
    <TD STYLE="border-bottom: Black 1pt solid; layout-grid-mode: line; width: 19%; text-align: right">April 16, 2012</TD>
    <TD STYLE="width: 26%; layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="width: 51%; layout-grid-mode: line; border-bottom: Black 1pt solid">/s/ David J. Browne</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line">&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line">David J. Browne, Corporate Secretary</TD></TR>
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{"company-data": {"conformed-name": "COMMERCIAL BANCSHARES INC \\OH\\", "cik": "0001009976", "assigned-sic": "6022", "irs-number": "341787239", "state-of-incorporation": "OH", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-27894", "film-number": "12761016"}, "business-address": {"street1": "118 S SANDUSKY AVE", "street2": "P O BOX 90", "city": "UPPER SANDUSKY", "state": "OH", "zip": "43351", "phone": "4192945781"}, "mail-address": {"street1": "118 S SANDUSKY AVE", "street2": "PO BOX 90", "city": "UPPER SANDUSKY", "state": "OH", "zip": "43351"}}
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 12, 2012
Commercial Bancshares, Inc.
(Exact Name of Registrant as Specified in Charter)
Ohio
0-27894
34-1787239
(State or Other Jurisdiction
(Commission
(IRS Employer
Of Incorporation)
File Number)
Identification No.)
118 South Sandusky Avenue, Upper Sandusky, Ohio
43351
(Address of Principal Executive Offices)
(Zip Code)
Registrant's telephone number, including area code
(419) 294-5781
(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
(see General Instruction A.2. below):
¨
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 5.02 - Departure of Directors or Certain Officers; Election
of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
Director Richard A. Sheaffer will reach
the Board's mandatory retirement age of 70 prior to the Board's May, 2012 meeting and retired, effective after the
Board's regularly scheduled meeting held on April 12, 2012. Mr. Sheaffer was originally elected as a member of the Board
of Directors on August 6, 1976. He was elected as Chairman of the board in January 1990, and served in that capacity until April
2007.
Item 8.01 – Other Events.
Effective April 12, 2012, the Company's
Board of Directors, by a unanimous resolution adopted on March 8, 2012, set the number of directors at ten. This reduction in the
number of directors, which had previously been set at eleven, coincided with the retirement of Richard A. Sheaffer. The Board of
Directors believes that reducing the number of directors at this time compliments its commitment to streamline the management function.
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 hereunto duly authorized.
Commercial Bancshares, Inc.
(Registrant)
Date
April 16, 2012
/s/ David J. Browne
David J. Browne, Corporate Secretary