-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EVGZlV5btpElBTv6JJokTUr4Ii8zU3BAoncUjspOPkTKhXd2QXQu2b3zdgPYh2I/
 2LyjxWYwxqpBSy1thCvFPA==

<SEC-DOCUMENT>0001360933-10-000027.txt : 20101008
<SEC-HEADER>0001360933-10-000027.hdr.sgml : 20101008
<ACCEPTANCE-DATETIME>20101008095007
ACCESSION NUMBER:		0001360933-10-000027
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101007
FILED AS OF DATE:		20101008
DATE AS OF CHANGE:		20101008

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ganim Randall E
		CENTRAL INDEX KEY:			0001360933

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-28846
		FILM NUMBER:		101115157

	MAIL ADDRESS:	
		STREET 1:		7700 BONHOMME AVENUE
		CITY:			ST. LOUIS
		STATE:			MO
		ZIP:			63105

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CENTRUE FINANCIAL CORP
		CENTRAL INDEX KEY:			0001019650
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				363145350
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7700 BONHOMME AVENUE
		STREET 2:		--
		CITY:			ST. LOUIS
		STATE:			MO
		ZIP:			63105
		BUSINESS PHONE:		314-505-5500

	MAIL ADDRESS:	
		STREET 1:		7700 BONHOMME AVENUE
		STREET 2:		--
		CITY:			ST. LOUIS
		STATE:			MO
		ZIP:			63105

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	UNIONBANCORP INC
		DATE OF NAME CHANGE:	19960724
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-10-07</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001019650</issuerCik>
        <issuerName>CENTRUE FINANCIAL CORP</issuerName>
        <issuerTradingSymbol>TRUE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001360933</rptOwnerCik>
            <rptOwnerName>Ganim Randall E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7700 BONHOMME AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ST. LOUIS</rptOwnerCity>
            <rptOwnerState>MO</rptOwnerState>
            <rptOwnerZipCode>63105</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>PHANTOM STOCK</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2010-10-07</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>684.9315</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.46</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>COMMON STOCK</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>684.9315</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>41070.3771</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">THE SHARES OF PHANTOM STOCK BECOME PAYABLE, IN CASH OR COMMON STOCK, AT THE ELECTION OF THE REPORTING PERSON, UPON THE REPORTING PERSON'S TERMINATION OF SERVICE AS A DIRECTOR.</footnote>
        <footnote id="F2">REPORTING PERSON ALSO HOLDS 39,077 SHARES AND 21,000 STOCK OPTIONS GRANTED UNDER THE ISSUER'S STOCK OPTION PLAN.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>RANDALL E. GANIM</signatureName>
        <signatureDate>2010-10-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----