-----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,
 H288d2H1BBmGjzfy+fLWf4Es2kIm65zz6ywDM7FG78OX4ugZ96G9Wp5XDhuxAh29
 I8x8IRa4IAgFWfuwCW5tyA==

<SEC-DOCUMENT>0001116502-08-001578.txt : 20080929
<SEC-HEADER>0001116502-08-001578.hdr.sgml : 20080929
<ACCEPTANCE-DATETIME>20080929115104
ACCESSION NUMBER:		0001116502-08-001578
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080926
FILED AS OF DATE:		20080929
DATE AS OF CHANGE:		20080929

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HELES MARK
		CENTRAL INDEX KEY:			0001249356

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-28333
		FILM NUMBER:		081093006

	BUSINESS ADDRESS:	
		STREET 1:		COASTAL BANKING CO INC
		STREET 2:		36 ISLAND PARKWAY
		CITY:			BEUFORT
		STATE:			SC
		ZIP:			29907

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COASTAL BANKING CO INC
		CENTRAL INDEX KEY:			0001093897
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				582455445
		STATE OF INCORPORATION:			SC
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		36 SEA ISLAND PKWY
		CITY:			BEAUFORT
		STATE:			SC
		ZIP:			29907
		BUSINESS PHONE:		8435221228

	MAIL ADDRESS:	
		STREET 1:		36 SEA ISLAND PKWY
		CITY:			BEAUFORT
		STATE:			SC
		ZIP:			29907
</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>2008-09-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001093897</issuerCik>
        <issuerName>COASTAL BANKING CO INC</issuerName>
        <issuerTradingSymbol>CBCO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001249356</rptOwnerCik>
            <rptOwnerName>HELES MARK</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>36 SEA ISLAND PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BEAUFORT</rptOwnerCity>
            <rptOwnerState>SC</rptOwnerState>
            <rptOwnerZipCode>29902</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-09-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.75</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>36807</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Relects a 5% stock dividend distributed on 3/26/2004, a 5% stock dividend distributed on 12/15/2006, and a 5% stock dividend distributed on 12/14/2007.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Mark Heles By: Indra Morton Attorney-in-Fact</signatureName>
        <signatureDate>2008-09-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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