<SEC-DOCUMENT>0000004977-18-000084.txt : 20180509
<SEC-HEADER>0000004977-18-000084.hdr.sgml : 20180509
<ACCEPTANCE-DATETIME>20180509113205
ACCESSION NUMBER:		0000004977-18-000084
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180507
FILED AS OF DATE:		20180509
DATE AS OF CHANGE:		20180509

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BOWERS WILLIAM P
		CENTRAL INDEX KEY:			0001225760

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07434
		FILM NUMBER:		18817322

	MAIL ADDRESS:	
		STREET 1:		600 NORTH 18TH STREET
		STREET 2:		BIN 15N-8170
		CITY:			BIRMINGHAM
		STATE:			AL
		ZIP:			35203

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AFLAC INC
		CENTRAL INDEX KEY:			0000004977
		STANDARD INDUSTRIAL CLASSIFICATION:	ACCIDENT & HEALTH INSURANCE [6321]
		IRS NUMBER:				581167100
		STATE OF INCORPORATION:			GA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1932 WYNNTON RD
		CITY:			COLUMBUS
		STATE:			GA
		ZIP:			31999
		BUSINESS PHONE:		7063233431

	MAIL ADDRESS:	
		STREET 1:		1932 WYNNTON ROAD
		CITY:			COLUMBUS
		STATE:			GA
		ZIP:			31999

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AMERICAN FAMILY CORP
		DATE OF NAME CHANGE:	19920306
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgardoc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-05-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000004977</issuerCik>
        <issuerName>AFLAC INC</issuerName>
        <issuerTradingSymbol>AFL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001225760</rptOwnerCik>
            <rptOwnerName>BOWERS WILLIAM P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AFLAC INCORPORATED</rptOwnerStreet1>
            <rptOwnerStreet2>1932 WYNNTON ROAD</rptOwnerStreet2>
            <rptOwnerCity>COLUMBUS</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>31999</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>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2018-05-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3477</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>27269</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On March 19, 2018, Aflac Incorporated effected a 2-for-1 stock split.  The number of shares and share prices reported throughout this Form 4 have been adjusted to reflect the stock split.</footnote>
        <footnote id="F2">Granted under the Aflac Incorporated Long-Term Incentive Plan (as Amended and Restated February 14, 2017).</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Joan M. DiBlasi For: William Paul Bowers</signatureName>
        <signatureDate>2018-05-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
