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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MyQa+b5fXhM2Dt316PjRZXFZoP5d91Xyq59GKIXY9Rm0kB0z8p1sZOvhKAiZTBt4
 IsONLKfQmf1zTzmQ3nU3rg==

<SEC-DOCUMENT>0000950138-06-000655.txt : 20060829
<SEC-HEADER>0000950138-06-000655.hdr.sgml : 20060829
<ACCEPTANCE-DATETIME>20060829163842
ACCESSION NUMBER:		0000950138-06-000655
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060828
FILED AS OF DATE:		20060829
DATE AS OF CHANGE:		20060829

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CABRERA MIGNON
		CENTRAL INDEX KEY:			0001374133

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13828
		FILM NUMBER:		061062959

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		636-474-5000

	MAIL ADDRESS:	
		STREET 1:		501 PEARL DRIVE
		CITY:			ST PETERS
		STATE:			MO
		ZIP:			63376

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MEMC ELECTRONIC MATERIALS INC
		CENTRAL INDEX KEY:			0000945436
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				561505767
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		501 PEARL DR
		CITY:			ST PETERS
		STATE:			MO
		ZIP:			63376
		BUSINESS PHONE:		6364745000

	MAIL ADDRESS:	
		STREET 1:		501 PEARL DRIVE
		STREET 2:		P. O. BOX 8
		CITY:			ST. PETERS
		STATE:			M0
		ZIP:			63376
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4_082906ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-08-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000945436</issuerCik>
        <issuerName>MEMC ELECTRONIC MATERIALS INC</issuerName>
        <issuerTradingSymbol>WFR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001374133</rptOwnerCik>
            <rptOwnerName>CABRERA MIGNON</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>501 PEARL DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ST PETERS</rptOwnerCity>
            <rptOwnerState>MO</rptOwnerState>
            <rptOwnerZipCode>63376</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr. V.P. of Human Resources</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>36.78</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-08-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>200000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2016-08-28</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>200000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>200000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The option to purchase 200,000 shares of common stock was awarded on August 28, 2006 under the MEMC 2001 Equity Incentive
 Plan in a transaction exempt under Rule 16b-3.  The options are exercisable at an exercise price of $36.78 per share.
 100,000 options become exercisable in 25% increments on August 28, 2007, August 28, 2008, August 28, 2009 and August 28,
 2010, respectively.  The remaining 100,000 options become exercisable on August 28, 2010.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Mignon Cabrera</signatureName>
        <signatureDate>2006-08-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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