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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MiafwemYUEish/cQoYbHXMFKgxnZ/TipBQ0vRxI9LajhAw13dVPqFJ4sj8QnjPGK
 VCykg162lJSjuUDbFP+coQ==

<SEC-DOCUMENT>0001209191-03-023090.txt : 20030926
<SEC-HEADER>0001209191-03-023090.hdr.sgml : 20030926
<ACCEPTANCE-DATETIME>20030926154614
ACCESSION NUMBER:		0001209191-03-023090
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030925
FILED AS OF DATE:		20030926

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MERZWEILER ROBERT G
		CENTRAL INDEX KEY:			0001231630

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10161
		FILM NUMBER:		03912551

	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>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-09-25</periodOfReport><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000354869</issuerCik>
        <issuerName>FIRSTMERIT CORP /OH/</issuerName>
        <issuerTradingSymbol>FMER</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001231630</rptOwnerCik>
            <rptOwnerName>MERZWEILER ROBERT G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>III CASCADE PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>AKRON</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44308</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-09-15</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1" /></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>155.05</value></transactionShares><transactionPricePerShare><value>25.77</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>15523.283</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><
directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>by Managed Account</value></natureOfOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-09-25</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F2" /></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>73.392</value></transactionShares><transactionPricePerShare><value>24.98</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>15596.675</value><footnoteId id="F3" /></sharesOwnedFollowingTransaction></postTran
sactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>by Managed Account</value><footnoteId id="F4" /></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">Allocated to the reporting person's account pursuant to a dividend reinvestment feature of the FirstMerit Corporation Director Deferred Compensation Plan.</footnote><footnote id="F2">Allocated to the reporting person's account under FirstMerit Corporation Director Deferred Compensation Plan.</footnote><footnote id="F3">Reporting person also holds 9,000 directly, 500 indirectly, by spouse, 500 indirectly, by daughter and 500 indirectly, by son.</footnote><footnote id="F4">Shares in reporting person's account under FirstMerit Corporation Director Deferred Compensation Plan.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>By:  Terry E. Patton
For:  Robert G. Merzweiler</signatureName><signatureDate>2003-09-26</signatureDate></ownerSignature></ownershipDocument>

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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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