-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 RNVevvR7sgAabylHJJ0Fiud0OeW2Z5x7XjwzYL/0RUcLTuyKkdCMLbCHCNsXgzcF
 mpIVq9M2nJzmUYn9M5IKVA==

<SEC-DOCUMENT>0001209191-08-025432.txt : 20080424
<SEC-HEADER>0001209191-08-025432.hdr.sgml : 20080424
<ACCEPTANCE-DATETIME>20080424151722
ACCESSION NUMBER:		0001209191-08-025432
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080423
FILED AS OF DATE:		20080424
DATE AS OF CHANGE:		20080424

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HEID JOSEPH E
		CENTRAL INDEX KEY:			0001219907

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-17506
		FILM NUMBER:		08774257

	MAIL ADDRESS:	
		STREET 1:		C/O UST INC
		STREET 2:		100 W PUTNAM AVE
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UST INC
		CENTRAL INDEX KEY:			0000811669
		STANDARD INDUSTRIAL CLASSIFICATION:	TOBACCO PRODUCTS [2100]
		IRS NUMBER:				061193986
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		6 HIGH RIDGE PARK
		STREET 2:		BUILDING A
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06905
		BUSINESS PHONE:		203-817-3000

	MAIL ADDRESS:	
		STREET 1:		6 HIGH RIDGE PARK
		STREET 2:		BUILDING A
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06905
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-04-23</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000811669</issuerCik>
        <issuerName>UST INC</issuerName>
        <issuerTradingSymbol>UST</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001219907</rptOwnerCik>
            <rptOwnerName>HEID JOSEPH E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O UST INC.</rptOwnerStreet1>
            <rptOwnerStreet2>6 HIGH RIDGE PARK, BLDG. A</rptOwnerStreet2>
            <rptOwnerCity>STAMFORD</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06905</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>2008-04-23</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>40</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>17808</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Includes a total of 1 share held in the UST Dividend Reinvestment Plan as of this date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Lorna R. Simms, Power of Attorney</signatureName>
        <signatureDate>2008-04-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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