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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001209191-10-009292.txt : 20100216
<SEC-HEADER>0001209191-10-009292.hdr.sgml : 20100215
<ACCEPTANCE-DATETIME>20100216130006
ACCESSION NUMBER:		0001209191-10-009292
CONFORMED SUBMISSION TYPE:	5
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20091231
FILED AS OF DATE:		20100216
DATE AS OF CHANGE:		20100216

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BICHSEL TERRENCE E
		CENTRAL INDEX KEY:			0001231635

	FILING VALUES:
		FORM TYPE:		5
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10161
		FILM NUMBER:		10605509

	MAIL ADDRESS:	
		STREET 1:		II CASCADE PLAZA
		CITY:			AKRON
		STATE:			OH
		ZIP:			44308

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRSTMERIT CORP /OH/
		CENTRAL INDEX KEY:			0000354869
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				341339938
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		111 CASCADE PLAZA
		STREET 2:		7TH FLOOR
		CITY:			AKRON
		STATE:			OH
		ZIP:			44308
		BUSINESS PHONE:		3309966300

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRSTMERIT CORP /
		DATE OF NAME CHANGE:	19980116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRSTMERIT CORP
		DATE OF NAME CHANGE:	19941219

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST BANCORPORATION OF OHIO /OH/
		DATE OF NAME CHANGE:	19941219
</SEC-HEADER>
<DOCUMENT>
<TYPE>5
<SEQUENCE>1
<FILENAME>doc5.xml
<DESCRIPTION>FORM 5 SUBMISSION
<TEXT>
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    <periodOfReport>2009-12-31</periodOfReport>

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        <issuerName>FIRSTMERIT CORP /OH/</issuerName>
        <issuerTradingSymbol>FMER</issuerTradingSymbol>
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            <rptOwnerStreet1>III CASCADE PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>AKRON</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44308</rptOwnerZipCode>
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        <reportingOwnerRelationship>
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            <isTenPercentOwner>0</isTenPercentOwner>
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            <officerTitle>Executive Vice President/CFO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <directOrIndirectOwnership>
                    <value>I</value>
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                <value></value>
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                <transactionPricePerShare>
                    <value>20.08</value>
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                    <value>A</value>
                </transactionAcquiredDisposedCode>
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                    <value>54056.315</value>
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                    <value>I</value>
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    <footnotes>
        <footnote id="F1">On April 28, 2009, FirstMerit Corporation declared a stock dividend payable to all common stock holders of record on June 1, 2009, of $0.13 per share for each share of common stock outstanding. As a result, Mr. Bichsel received 282 shares of the Company's common stock on June 15, 2009.</footnote>
        <footnote id="F2">On August 20, 2009, FirstMerit Corporation declared a stock dividend, payable to all common stock  holders of record on August 31, 2009, of $0.13 per share for each share of common stock outstanding.  As a result, Mr. Bichsel received 276 shares of the Company's common stock on September 21, 2009.</footnote>
        <footnote id="F3">Allocated to the reporting person's account pursuant to a dividend reinvestment feature of the FirstMerit Corporation Executive Deferred Compensation Plan which amount includes the cash and stock portion of the dividend payable to all common stock holders of record on June 1, 2009.</footnote>
        <footnote id="F4">Allocated to the reporting person's account under FirstMerit Corporation 401(k) Plan which amount includes the cash and stock portion of the dividend payable to all common stock holders of record on June 1, 2009.</footnote>
        <footnote id="F5">Allocated to the reporting person's account pursuant to a dividend reinvestment feature of the FirstMerit Corporation Executive Deferred Compensation Plan which amount includes the cash and stock portion of the dividend payable to all common stock holders of record on August 31, 2009.</footnote>
        <footnote id="F6">Allocated to the reporting person's account under FirstMerit Corporation 401(k) Plan which amount includes the cash and stock portion of the dividend payable to all common stock holders of record on August 31, 2009.</footnote>
        <footnote id="F7">Allocated to reporting person's account pursuant to a dividend reinvestment feature of the FirstMerit Corporation Executive Deferred Compensation Plan.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By:  Judith A. Steiner
For:  Terrence E. Bichsel</signatureName>
        <signatureDate>2010-02-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----