<SEC-DOCUMENT>0001127602-17-015729.txt : 20170427
<SEC-HEADER>0001127602-17-015729.hdr.sgml : 20170427
<ACCEPTANCE-DATETIME>20170427165557
ACCESSION NUMBER:		0001127602-17-015729
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170425
FILED AS OF DATE:		20170427
DATE AS OF CHANGE:		20170427

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST HORIZON NATIONAL CORP
		CENTRAL INDEX KEY:			0000036966
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				620803242
		STATE OF INCORPORATION:			TN
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		165 MADISON AVENUE
		CITY:			MEMPHIS
		STATE:			TN
		ZIP:			38103
		BUSINESS PHONE:		9018186232

	MAIL ADDRESS:	
		STREET 1:		165 MADISON AVENUE
		CITY:			MEMPHIS
		STATE:			TN
		ZIP:			38103

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST TENNESSEE NATIONAL CORP
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST TENNESSEE BANKS INC
		DATE OF NAME CHANGE:	19600201

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Stewart Cecelia D.
		CENTRAL INDEX KEY:			0001572074

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15185
		FILM NUMBER:		17789976

	MAIL ADDRESS:	
		STREET 1:		8410 W. BRYN MAWR, SUITE 700
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60631
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-04-25</periodOfReport>

    <issuer>
        <issuerCik>0000036966</issuerCik>
        <issuerName>FIRST HORIZON NATIONAL CORP</issuerName>
        <issuerTradingSymbol>FHN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001572074</rptOwnerCik>
            <rptOwnerName>Stewart Cecelia D.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>165 MADISON AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MEMPHIS</rptOwnerCity>
            <rptOwnerState>TN</rptOwnerState>
            <rptOwnerZipCode>38103</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-04-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4059</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>19006</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Grant of Restricted Stock Units which will vest April 2, 2018.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ John A. Niemoeller, attorney-in-fact</signatureName>
        <signatureDate>2017-04-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
