-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Rd/r2xMxgddip//jWrcV5VAQWHp4DOmT1KyGlj8DFwzE3t3lBEZ+tm11LJaFdnic
 HLsjlgkmdTn75NUZSn9c7g==

<SEC-DOCUMENT>0000035527-10-000221.txt : 20100921
<SEC-HEADER>0000035527-10-000221.hdr.sgml : 20100921
<ACCEPTANCE-DATETIME>20100921170913
ACCESSION NUMBER:		0000035527-10-000221
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100917
FILED AS OF DATE:		20100921
DATE AS OF CHANGE:		20100921

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIFTH THIRD BANCORP
		CENTRAL INDEX KEY:			0000035527
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				310854434
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		38 FOUNTAIN SQ PLZ
		STREET 2:		FIFTH THIRD CENTER
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45263
		BUSINESS PHONE:		5135795300

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KABAT KEVIN T
		CENTRAL INDEX KEY:			0001024525
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33653
		FILM NUMBER:		101083128

	MAIL ADDRESS:	
		STREET 1:		UNUM GROUP
		STREET 2:		1 FOUNTAIN SQUARE
		CITY:			CHATTANOOGA
		STATE:			TN
		ZIP:			37402
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-09-17</periodOfReport>

    <issuer>
        <issuerCik>0000035527</issuerCik>
        <issuerName>FIFTH THIRD BANCORP</issuerName>
        <issuerTradingSymbol>FITB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001024525</rptOwnerCik>
            <rptOwnerName>KABAT KEVIN T</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>38 FOUNTAIN SQUARE PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CINCINNATI</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45263</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President &amp; CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Phantom Stock Units</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2010-09-17</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2010-09-20</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>6478.712</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>6478.712</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>238603.4</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The phantom stock units represent a portion of the reporting person's salary, net of withholdings and deductions, and were issued under the Fifth Third Bancorp 2008 Incentive Compensation Plan.  For more information, please see the Current Report on Form 8-K filed by Fifth Third Bancorp on September 25, 2009.</footnote>
        <footnote id="F2">Each phantom stock unit is the economic equivalent of of one share of Fifth Third Bancorp common stock.</footnote>
        <footnote id="F3">Phantom stock units will be settled in cash in two equal installments on June 15, 2012 and June 15, 2013 or on the earlier death of the reporting person.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Paul L. Reynolds, as Attorney-in-Fact for Kevin T. Kabat</signatureName>
        <signatureDate>2010-09-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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