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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001185882-05-000017.txt : 20050404
<SEC-HEADER>0001185882-05-000017.hdr.sgml : 20050404
<ACCEPTANCE-DATETIME>20050404200642
ACCESSION NUMBER:		0001185882-05-000017
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050331
FILED AS OF DATE:		20050404
DATE AS OF CHANGE:		20050404

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ALASKA COMMUNICATIONS SYSTEMS GROUP INC
		CENTRAL INDEX KEY:			0001089511
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE COMMUNICATIONS (NO RADIO TELEPHONE) [4813]
		IRS NUMBER:				522126573
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		600 TELEPHONE AVENUE
		STREET 2:		-
		CITY:			ANCHORAGE
		STATE:			AK
		ZIP:			99503
		BUSINESS PHONE:		9072973000

	MAIL ADDRESS:	
		STREET 1:		600 TELEPHONE AVENUE
		STREET 2:		-
		CITY:			ANCHORAGE
		STATE:			AK
		ZIP:			99503

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALEC HOLDINGS INC
		DATE OF NAME CHANGE:	19990624

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EGAN JOHN M
		CENTRAL INDEX KEY:			0001185882

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-28167
		FILM NUMBER:		05731985

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		6784738300

	MAIL ADDRESS:	
		STREET 1:		C/O ARRIS GROUP INC
		STREET 2:		11450 TECHNOLOGY CIRCLE
		CITY:			DULUTH
		STATE:			GA
		ZIP:			30097
</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>2005-03-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001089511</issuerCik>
        <issuerName>ALASKA COMMUNICATIONS SYSTEMS GROUP INC</issuerName>
        <issuerTradingSymbol>alsk</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001185882</rptOwnerCik>
            <rptOwnerName>EGAN JOHN M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>10 PAPAYA STREET</rptOwnerStreet1>
            <rptOwnerStreet2>APARTMENT 1604</rptOwnerStreet2>
            <rptOwnerCity>CLEARWATER BEACH</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33767</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>2005-03-31</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>708</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.05</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>33298</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Common stock award for services provided as a Director under the Alaska Communications Systems Group, Inc. 1999 Non-employee Director Stock Compensation Plan.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>John M. Egan</signatureName>
        <signatureDate>2005-04-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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