<SEC-DOCUMENT>0001127602-23-011669.txt : 20230331
<SEC-HEADER>0001127602-23-011669.hdr.sgml : 20230331
<ACCEPTANCE-DATETIME>20230331122422
ACCESSION NUMBER:		0001127602-23-011669
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230330
FILED AS OF DATE:		20230331
DATE AS OF CHANGE:		20230331

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Koolhaas Dinette
		CENTRAL INDEX KEY:			0001819739

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-01088
		FILM NUMBER:		23785668

	MAIL ADDRESS:	
		STREET 1:		999 WEST BIG BEAVER ROAD
		CITY:			TROY
		STATE:			MI
		ZIP:			48084-4716

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KELLY SERVICES INC
		CENTRAL INDEX KEY:			0000055135
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-HELP SUPPLY SERVICES [7363]
		IRS NUMBER:				381510762
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		999 W BIG BEAVER RD
		CITY:			TROY
		STATE:			MI
		ZIP:			48084
		BUSINESS PHONE:		2483624444

	MAIL ADDRESS:	
		STREET 1:		999 WEST BIG BEAVER RD
		CITY:			TROY
		STATE:			MI
		ZIP:			48084
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0407</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-03-30</periodOfReport>

    <issuer>
        <issuerCik>0000055135</issuerCik>
        <issuerName>KELLY SERVICES INC</issuerName>
        <issuerTradingSymbol>KELYA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001819739</rptOwnerCik>
            <rptOwnerName>Koolhaas Dinette</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>999 WEST BIG BEAVER ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>TROY</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>48084-4716</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>Senior Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock, Par Value $1</value>
            </securityTitle>
            <transactionDate>
                <value>2023-03-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1676</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>16.2553</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>35173</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares that were sold to satisfy tax withholding related to various restricted stock awards that vested over the period February 13, 2023 through February 16, 2023. The shares were sold at a weighted average price of $16.2553 per share.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Cynthia D. Mull, attorney-in-fact for Ms. Koolhaas</signatureName>
        <signatureDate>2023-03-31</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
