<SEC-DOCUMENT>0000912593-22-000055.txt : 20220225
<SEC-HEADER>0000912593-22-000055.hdr.sgml : 20220225
<ACCEPTANCE-DATETIME>20220225163039
ACCESSION NUMBER:		0000912593-22-000055
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220225
FILED AS OF DATE:		20220225
DATE AS OF CHANGE:		20220225

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BERGERON STEPHANIE W
		CENTRAL INDEX KEY:			0001201066

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12616
		FILM NUMBER:		22680602

	MAIL ADDRESS:	
		STREET 1:		27777 FRANKLIN ROAD, STE 200
		STREET 2:		SUN COMMUNITIES, INC
		CITY:			SOUTHFIELD
		STATE:			MI
		ZIP:			48034

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SUN COMMUNITIES INC
		CENTRAL INDEX KEY:			0000912593
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				382730780
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		27777 FRANKLIN ROAD
		STREET 2:		SUITE 200
		CITY:			SOUTHFIELD
		STATE:			MI
		ZIP:			48034
		BUSINESS PHONE:		2482082500

	MAIL ADDRESS:	
		STREET 1:		27777 FRANKLIN ROAD
		STREET 2:		SUITE 200
		CITY:			SOUTHFIELD
		STATE:			MI
		ZIP:			48034
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_164582458820998.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-02-25</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000912593</issuerCik>
        <issuerName>SUN COMMUNITIES INC</issuerName>
        <issuerTradingSymbol>SUI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001201066</rptOwnerCik>
            <rptOwnerName>BERGERON STEPHANIE W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>27777 FRANKLIN ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>SOUTHFIELD</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>48034</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 STOCK, $0.01 PAR VALUE</value>
            </securityTitle>
            <transactionDate>
                <value>2022-02-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>181.59</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>21100</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The price reported in Column 4 is a volume weighted average price. These shares were sold in multiple transactions with prices ranging from $181.51 to $181.78, inclusive. The reporting person undertakes to provide to Sun Communities, Inc., any security holder of Sun Communities, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Stephanie W. Bergeron</signatureName>
        <signatureDate>2022-02-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
