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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 WZDiM4ufdb74+b6l9F6rP2AAfBSjYFflzIfNttmoFt3KI/Dx16mGGWuye5e/lq0T
 ksmRSZkFFpaMo+pjOiz98w==

<SEC-DOCUMENT>0001179110-10-008892.txt : 20100519
<SEC-HEADER>0001179110-10-008892.hdr.sgml : 20100519
<ACCEPTANCE-DATETIME>20100519144154
ACCESSION NUMBER:		0001179110-10-008892
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100517
FILED AS OF DATE:		20100519
DATE AS OF CHANGE:		20100519

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ROSETTA STONE INC
		CENTRAL INDEX KEY:			0001351285
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				043837082

	BUSINESS ADDRESS:	
		STREET 1:		1919 NORTH LYNN STREET
		STREET 2:		SUITE 700
		CITY:			ARLINGTON
		STATE:			VA
		ZIP:			22209
		BUSINESS PHONE:		1-800-788-0822

	MAIL ADDRESS:	
		STREET 1:		1919 NORTH LYNN STREET
		STREET 2:		SUITE 700
		CITY:			ARLINGTON
		STATE:			VA
		ZIP:			22209

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HELMAN BRIAN D
		CENTRAL INDEX KEY:			0001179137

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34283
		FILM NUMBER:		10844957

	MAIL ADDRESS:	
		STREET 1:		C/O ROSETTA STONE INC.
		STREET 2:		1919 NORTH LYNN STREET 7TH FLOOR
		CITY:			ARLINGTON
		STATE:			VA
		ZIP:			22209
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-05-17</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001351285</issuerCik>
        <issuerName>ROSETTA STONE INC</issuerName>
        <issuerTradingSymbol>RST</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001179137</rptOwnerCik>
            <rptOwnerName>HELMAN BRIAN D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1919 NORTH LYNN STREET 7TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ARLINGTON</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>22209</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-05-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7250</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>24.9773</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14750</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">These shares were sold pursuant to a 10b5-1 Trading Plan adopted by the reporting person on March 5, 2010.</footnote>
        <footnote id="F2">This transaction was executed in multiple trades at prices ranging from $24.88 to $25.06. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Michael C. Wu, Attorney-in-fact</signatureName>
        <signatureDate>2010-05-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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