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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EJuS6auwBhNd7rjd1TnQWjFpPXncPola6FGX/x/E0v3Oi/ApqvToBLwTErWWXQAL
 plgktcq7lqnrthvVopCwsQ==

<SEC-DOCUMENT>0001362004-08-000044.txt : 20080408
<SEC-HEADER>0001362004-08-000044.hdr.sgml : 20080408
<ACCEPTANCE-DATETIME>20080408120713
ACCESSION NUMBER:		0001362004-08-000044
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080401
FILED AS OF DATE:		20080408
DATE AS OF CHANGE:		20080408

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ICF International, Inc.
		CENTRAL INDEX KEY:			0001362004
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT CONSULTING SERVICES [8742]
		IRS NUMBER:				223661438
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		9300 LEE HIGHWAY
		CITY:			FAIRFAX
		STATE:			VA
		ZIP:			22031
		BUSINESS PHONE:		(703) 934-3000

	MAIL ADDRESS:	
		STREET 1:		9300 LEE HIGHWAY
		CITY:			FAIRFAX
		STATE:			VA
		ZIP:			22031

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Datar Srikant
		CENTRAL INDEX KEY:			0001376436

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33045
		FILM NUMBER:		08744677

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		703-934-3000

	MAIL ADDRESS:	
		STREET 1:		ICF INTERNATIONAL, INC.
		STREET 2:		9300 LEE HIGHWAY
		CITY:			FAIRFAX
		STATE:			VA
		ZIP:			22031
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-04-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001362004</issuerCik>
        <issuerName>ICF International, Inc.</issuerName>
        <issuerTradingSymbol>ICFI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001376436</rptOwnerCik>
            <rptOwnerName>Datar Srikant</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ICF INTERNATIONAL, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>9300 LEE HIGHWAY</rptOwnerStreet2>
            <rptOwnerCity>FAIRFAX</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>22031</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9661</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-04-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>197</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9858</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">197 shares issued in lieu of cash for director retainer.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Judith Kassel</signatureName>
        <signatureDate>2008-04-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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