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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 DV34dT+Rs4mZ3TTzl/5/vHq2XkfqP7G84Va8tzM7X3wKaD6E68Wzvp46wyvWSzh/
 qV953j+JkmWYb20n7IuCyA==

<SEC-DOCUMENT>0001140361-10-030850.txt : 20100730
<SEC-HEADER>0001140361-10-030850.hdr.sgml : 20100730
<ACCEPTANCE-DATETIME>20100730151320
ACCESSION NUMBER:		0001140361-10-030850
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100728
FILED AS OF DATE:		20100730
DATE AS OF CHANGE:		20100730

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hanna Randall W
		CENTRAL INDEX KEY:			0001487076

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-13089
		FILM NUMBER:		10981115

	MAIL ADDRESS:	
		STREET 1:		P.O. BOX
		STREET 2:		4019
		CITY:			GULFPORT
		STATE:			MS
		ZIP:			39502

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HANCOCK HOLDING CO
		CENTRAL INDEX KEY:			0000750577
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				640693170
		STATE OF INCORPORATION:			MS
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE HANCOCK PLZ
		STREET 2:		P.O. BOX 4019
		CITY:			GULFPORT
		STATE:			MS
		ZIP:			39501
		BUSINESS PHONE:		6018684605

	MAIL ADDRESS:	
		STREET 1:		ONE HANCOCK PLZ
		STREET 2:		P O BOX 4019
		CITY:			GULFPORT
		STATE:			MS
		ZIP:			39501
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4/A
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2010-07-28</periodOfReport>

    <dateOfOriginalSubmission>2010-07-28</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000750577</issuerCik>
        <issuerName>HANCOCK HOLDING CO</issuerName>
        <issuerTradingSymbol>HBHC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001487076</rptOwnerCik>
            <rptOwnerName>Hanna Randall W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>P.O. BOX 4019</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GULFPORT</rptOwnerCity>
            <rptOwnerState>MS</rptOwnerState>
            <rptOwnerZipCode>39502</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common</value>
            </securityTitle>
            <transactionDate>
                <value>2010-07-28</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2010-07-30</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>30.33</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3465.5397</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Open market purchase of equity shares.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Randall W. Hanna by: Paul D. Guichet, POA</signatureName>
        <signatureDate>2010-07-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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