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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,
 RkvpNggwALJxkIDjPzaV+wFSxDJO20bNu0kuvpVUjX/GmYn7my6m2G6tpHkRjSu7
 LuDHhwvvUk31YGsJ2UAb9g==

<SEC-DOCUMENT>0001181431-03-014181.txt : 20030716
<SEC-HEADER>0001181431-03-014181.hdr.sgml : 20030716
<ACCEPTANCE-DATETIME>20030716115529
ACCESSION NUMBER:		0001181431-03-014181
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030714
FILED AS OF DATE:		20030716

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WELCH ED V
		CENTRAL INDEX KEY:			0001190715

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13508
		FILM NUMBER:		03788662

	BUSINESS ADDRESS:	
		STREET 1:		P.O. BOX 235018
		CITY:			MONTGOMERY
		STATE:			AL
		ZIP:			36310

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COLONIAL BANCGROUP INC
		CENTRAL INDEX KEY:			0000092339
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				630661573
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE COMMERCE ST STE 800
		STREET 2:		P O BOX 1108
		CITY:			MONTGOMERY
		STATE:			AL
		ZIP:			36104
		BUSINESS PHONE:		3342405000

	MAIL ADDRESS:	
		STREET 1:		ONE COMMERCE STREET STE 800
		STREET 2:		PO BOX 1108
		CITY:			MONTGOMERY
		STATE:			AL
		ZIP:			36101

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SOUTHLAND BANCORPORATION
		DATE OF NAME CHANGE:	19820205
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd9836.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-07-14</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000092339</issuerCik>
        <issuerName>COLONIAL BANCGROUP INC</issuerName>
        <issuerTradingSymbol>CNB</issuerTradingSymbol></issuer>
<reportingOwner>
<reportingOwnerId>
            <rptOwnerCik>0001190715</rptOwnerCik>
            <rptOwnerName>WELCH ED V</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector>
<isOfficer>0</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle></officerTitle>
<otherText></otherText></reportingOwnerRelationship></reportingOwner>
<nonDerivativeSecurity>
<securityTitle>
<value>Common Stock</value></securityTitle>
<transactionDate>
<value>2003-07-14</value></transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>J</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
<footnoteId id="F1"/></transactionCoding>
<transactionTimeliness>
<value></value></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>222</value></transactionShares>
<transactionValue>
<value>11.24</value></transactionValue>
<transactionAcquiredDisposedCode>
<value>A</value></transactionAcquiredDisposedCode></transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>64375</value></sharesOwnedFollowingTransaction></postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value></directOrIndirectOwnership>
<natureOfOwnership>
<value></value></natureOfOwnership></ownershipNature></nonDerivativeSecurity>
<nonDerivativeSecurity>
<securityTitle>
<value>Common Stock</value></securityTitle>
<transactionDate>
<value>2003-07-15</value></transactionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>J</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
<footnoteId id="F2"/></transactionCoding>
<transactionTimeliness>
<value></value></transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>33</value></transactionShares>
<transactionValue>
<value>14.76</value></transactionValue>
<transactionAcquiredDisposedCode>
<value>A</value></transactionAcquiredDisposedCode></transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>64408</value></sharesOwnedFollowingTransaction></postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value></directOrIndirectOwnership>
<natureOfOwnership>
<value></value></natureOfOwnership></ownershipNature></nonDerivativeSecurity>
<footnotes>
<footnote id="F1">Shares Issued through the Restricted Stock Plan for Directors.</footnote>
<footnote id="F2">Shares Issued through the Restricted Stock Plan for Directors.</footnote></footnotes>
<ownerSignature>
<signatureName>Lisa M. Free, Pursuant to Power of Attorney on file</signatureName>
<signatureDate>2003-07-16</signatureDate></ownerSignature></ownershipDocument>


</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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