-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 DkFeRD83WQl1JL8qQNL6WW8t/9oJkEPROq/JA1fEj9QlBETvIAC8sIDUPOXfCu4n
 uzYTZGcOvFdZAdyH2ZDmhQ==

<SEC-DOCUMENT>0001029299-10-000075.txt : 20100226
<SEC-HEADER>0001029299-10-000075.hdr.sgml : 20100226
<ACCEPTANCE-DATETIME>20100226174527
ACCESSION NUMBER:		0001029299-10-000075
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100225
FILED AS OF DATE:		20100226
DATE AS OF CHANGE:		20100226

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Parent Carolyn J
		CENTRAL INDEX KEY:			0001408686

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33772
		FILM NUMBER:		10641130

	MAIL ADDRESS:	
		STREET 1:		C/O DELTEK, INC.
		STREET 2:		13880 DULLES CORNER LANE
		CITY:			HERNDON
		STATE:			VA
		ZIP:			20171

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DELTEK, INC
		CENTRAL INDEX KEY:			0001029299
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING SERVICES [7371]
		IRS NUMBER:				541252625
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		13880 DULLES CORNER LANE
		CITY:			HERNDON
		STATE:			VA
		ZIP:			20171
		BUSINESS PHONE:		7037348606

	MAIL ADDRESS:	
		STREET 1:		13880 DULLES CORNER LANE
		CITY:			HERNDON
		STATE:			VA
		ZIP:			20171

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DELTEK SYSTEMS INC
		DATE OF NAME CHANGE:	19970430
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-02-25</periodOfReport>

    <issuer>
        <issuerCik>0001029299</issuerCik>
        <issuerName>DELTEK, INC</issuerName>
        <issuerTradingSymbol>PROJ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001408686</rptOwnerCik>
            <rptOwnerName>Parent Carolyn J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>DELTEK, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>13880 DULLES CORNER LANE</rptOwnerStreet2>
            <rptOwnerCity>HERNDON</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>20171</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP of Worldwide Sales</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-02-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>6500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.45</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>135619</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Salman Ahmad, Attorney-in-Fact for Carolyn J. Parent</signatureName>
        <signatureDate>2010-02-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----