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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,
 EeVI7kLsWW8LytdHb+w4AXdYpjOcJNCFfDcIrW57Wqq0IDMCGYQFZGGM5nTFfY/g
 pbOCEetzYKiEprQSfZR2ow==

<SEC-DOCUMENT>0001209191-03-014415.txt : 20030730
<SEC-HEADER>0001209191-03-014415.hdr.sgml : 20030730
<ACCEPTANCE-DATETIME>20030730161445
ACCESSION NUMBER:		0001209191-03-014415
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030729
FILED AS OF DATE:		20030730

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

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:		03811678

	MAIL ADDRESS:	
		STREET 1:		II CASCADE PLAZA
		CITY:			AKRON
		STATE:			OH
		ZIP:			44308
</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>2003-07-29</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>2003-07-29</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>J</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1" /></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>155.73</value></transactionShares><transactionPricePerShare><value>23.01</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>15245.146</value><footnoteId id="F2" /></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwner
ship><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>by Managed Account</value><footnoteId id="F3" /></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">Allocated to the reporting person's account under FirstMerit Corporation Director Deferred Compensation Plan.</footnote><footnote id="F2">Reporting person also holds 9,000 directly, 500 indirectly, by spouse, 500 indirectly, by daughter and 500 indirectly, by son.</footnote><footnote id="F3">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>2003-07-30</signatureDate></ownerSignature></ownershipDocument>

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