-----BEGIN PRIVACY-ENHANCED MESSAGE-----
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>0001001865-04-000026.txt : 20040702
<SEC-HEADER>0001001865-04-000026.hdr.sgml : 20040702
<ACCEPTANCE-DATETIME>20040702213909
ACCESSION NUMBER:		0001001865-04-000026
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040701
FILED AS OF DATE:		20040702

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COAST CASINOS INC
		CENTRAL INDEX KEY:			0001001865
		STANDARD INDUSTRIAL CLASSIFICATION:	HOTELS & MOTELS [7011]
		IRS NUMBER:				880345704
		STATE OF INCORPORATION:			NV
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4500 W TROPICANA AVE
		STREET 2:		POST OFFICE BOX 80750
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89103
		BUSINESS PHONE:		7023657000

	MAIL ADDRESS:	
		STREET 1:		4500 W TROPICANA AVE
		STREET 2:		PO BOX 80750
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89103

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COAST RESORTS INC
		DATE OF NAME CHANGE:	19951005

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TIBERTI J TITO
		CENTRAL INDEX KEY:			0001005773

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31352
		FILM NUMBER:		04901232

	BUSINESS ADDRESS:	
		STREET 1:		1806 SOUTH INDUSTRIAL RD
		CITY:			LAS VEGA
		STATE:			NV
		ZIP:			89102
		BUSINESS PHONE:		2132297360

	MAIL ADDRESS:	
		STREET 1:		TIBERTI J TITO
		STREET 2:		1806 SOUTH INDUSTRIAL RD
		CITY:			LAS VEGA
		STATE:			NV
		ZIP:			89102
</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>2004-07-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001001865</issuerCik>
        <issuerName>COAST CASINOS INC</issuerName>
        <issuerTradingSymbol>N/A</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001005773</rptOwnerCik>
            <rptOwnerName>TIBERTI J TITO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TIBERTI J TITO</rptOwnerStreet1>
            <rptOwnerStreet2>1806 SOUTH INDUSTRIAL RD</rptOwnerStreet2>
            <rptOwnerCity>LAS VEGA</rptOwnerCity>
            <rptOwnerState>NV</rptOwnerState>
            <rptOwnerZipCode>89102</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Secretary</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>78911.47</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>200</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Trustee of Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>12000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Through Partnership</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8640</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F5"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Through Partnership</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Disposed of pursuant to the agreement and plan of merger among the issuer, Boyd Gaming Corporation and its subsudiary, BGC, Inc., in exchange for (a) 222,171 shares of Boyd Gaming Corporation common stock having a market value of $26.57 per share on June 30, 2004, the day immediately preceding the effective date of the merger; and (b) $39,676,166.99.</footnote>
        <footnote id="F2">Disposed of pursuant to the agreement and plan of merger among the issuer, Boyd Gaming Corporation and its subsudiary, BGC, Inc., in exchange for (a) 590 shares of Boyd Gaming Corporation common stock having a market value of $26.57 per share on June 30, 2004, the day immediately preceding the effective date of the merger; and (b) $100,111.36.</footnote>
        <footnote id="F3">These shares are held by a trust and partnerships of which the trust is a partner, for the benefit of the reporting person's adult children.  The reporting person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the reporting person is a beneficial owner of these securities for purposes of Section 16 or for any other purpose.</footnote>
        <footnote id="F4">Disposed of pursuant to the agreement and plan of merger among the issuer, Boyd Gaming Corporation and its subsudiary, BGC, Inc., in exchange for (a) 33,786 shares of Boyd Gaming Corporation common stock having a market value of $26.57 per share on June 30, 2004, the day immediately preceding the effective date of the merger; and (b) $6,033,514.68.</footnote>
        <footnote id="F5">Disposed of pursuant to the agreement and plan of merger among the issuer, Boyd Gaming Corporation and its subsudiary, BGC, Inc., in exchange for (a) 24,339 shares of Boyd Gaming Corporation common stock having a market value of $26.57 per share on June 30, 2004, the day immediately preceding the effective date of the merger; and (b) $4,343,911.61.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ J. Tito Tiberti</signatureName>
        <signatureDate>2004-07-01</signatureDate>
    </ownerSignature>
</ownershipDocument>

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