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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>0001104659-08-058134.txt : 20080911
<SEC-HEADER>0001104659-08-058134.hdr.sgml : 20080911
<ACCEPTANCE-DATETIME>20080911120211
ACCESSION NUMBER:		0001104659-08-058134
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080909
FILED AS OF DATE:		20080911
DATE AS OF CHANGE:		20080911

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PROTECTION ONE INC
		CENTRAL INDEX KEY:			0000916230
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MISCELLANEOUS BUSINESS SERVICES [7380]
		IRS NUMBER:				931063818
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1035 N. 3RD ST.
		STREET 2:		SUITE 101
		CITY:			LAWRENCE
		STATE:			KS
		ZIP:			66044
		BUSINESS PHONE:		785 856 5500

	MAIL ADDRESS:	
		STREET 1:		1035 N. 3RD ST.
		STREET 2:		SUITE 101
		CITY:			LAWRENCE
		STATE:			KS
		ZIP:			66044

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			NEVIN DARIUS G
		CENTRAL INDEX KEY:			0001184810

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12181-01
		FILM NUMBER:		081066650

	BUSINESS ADDRESS:	
		STREET 1:		818 S KANSAS AVE
		CITY:			TOPEKA
		STATE:			KS
		ZIP:			66612
		BUSINESS PHONE:		7855751617
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-09-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000916230</issuerCik>
        <issuerName>PROTECTION ONE INC</issuerName>
        <issuerTradingSymbol>PONE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001184810</rptOwnerCik>
            <rptOwnerName>NEVIN DARIUS G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1035 N. 3RD STREET, SUITE 101</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LAWRENCE</rptOwnerCity>
            <rptOwnerState>KS</rptOwnerState>
            <rptOwnerZipCode>66044</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Vice President &amp; CFO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock, $0.01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2008-09-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>6000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.99</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>96111</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>/s/ J. Eric Griffin, under power of attorney</signatureName>
        <signatureDate>2008-09-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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