<?xml version="1.0"?><?xml-stylesheet type="text/xsl" href="../4_X02.xsl"?><ownershipDocument>    <schemaVersion>X0303</schemaVersion>    <documentType>4</documentType>    <periodOfReport>2010-08-02</periodOfReport>    <notSubjectToSection16>0</notSubjectToSection16>    <issuer>        <issuerCik>0001051470</issuerCik>        <issuerName>CROWN CASTLE INTERNATIONAL CORP</issuerName>        <issuerTradingSymbol>CCI</issuerTradingSymbol>    </issuer>    <reportingOwner>        <reportingOwnerId>            <rptOwnerCik>0001085349</rptOwnerCik>            <rptOwnerName>KELLY JOHN P</rptOwnerName>        </reportingOwnerId>        <reportingOwnerAddress>            <rptOwnerStreet1>1220 AUGUSTA</rptOwnerStreet1>            <rptOwnerStreet2>SUITE 500</rptOwnerStreet2>            <rptOwnerCity>HOUSTON</rptOwnerCity>            <rptOwnerState>TX</rptOwnerState>            <rptOwnerZipCode>77057</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, $0.01 Par Value</value>            </securityTitle>            <transactionDate>                <value>2010-08-02</value>            </transactionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>M</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionAmounts>                <transactionShares>                    <value>149600</value>                    <footnoteId id="F1"/>                </transactionShares>                <transactionPricePerShare>                    <value>8.70</value>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>A</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>1159017</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </nonDerivativeTransaction>        <nonDerivativeTransaction>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <transactionDate>                <value>2010-08-02</value>            </transactionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>S</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionAmounts>                <transactionShares>                    <value>149600</value>                    <footnoteId id="F1"/>                </transactionShares>                <transactionPricePerShare>                    <value>40.1073</value>                    <footnoteId id="F4"/>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>1009417</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </nonDerivativeTransaction>        <nonDerivativeTransaction>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <transactionDate>                <value>2010-08-03</value>            </transactionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>M</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionAmounts>                <transactionShares>                    <value>7677</value>                    <footnoteId id="F1"/>                </transactionShares>                <transactionPricePerShare>                    <value>8.70</value>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>1017094</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </nonDerivativeTransaction>        <nonDerivativeTransaction>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <transactionDate>                <value>2010-08-03</value>            </transactionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>S</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionAmounts>                <transactionShares>                    <value>7677</value>                    <footnoteId id="F1"/>                </transactionShares>                <transactionPricePerShare>                    <value>41.00</value>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>1009417</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </nonDerivativeTransaction>        <nonDerivativeTransaction>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <transactionDate>                <value>2010-08-04</value>            </transactionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>M</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionAmounts>                <transactionShares>                    <value>142323</value>                    <footnoteId id="F1"/>                </transactionShares>                <transactionPricePerShare>                    <value>8.70</value>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>1151740</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </nonDerivativeTransaction>        <nonDerivativeTransaction>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <transactionDate>                <value>2010-08-04</value>            </transactionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>S</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionAmounts>                <transactionShares>                    <value>142323</value>                    <footnoteId id="F1"/>                </transactionShares>                <transactionPricePerShare>                    <value>41.0106</value>                    <footnoteId id="F5"/>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>1009417</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </nonDerivativeTransaction>        <nonDerivativeHolding>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>22618</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>I</value>                </directOrIndirectOwnership>                <natureOfOwnership>                    <value>By GRAT 2009-1</value>                </natureOfOwnership>            </ownershipNature>        </nonDerivativeHolding>        <nonDerivativeHolding>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>22618</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>I</value>                </directOrIndirectOwnership>                <natureOfOwnership>                    <value>By GRAT 2009-2</value>                </natureOfOwnership>            </ownershipNature>        </nonDerivativeHolding>        <nonDerivativeHolding>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>405</value>                    <footnoteId id="F2"/>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>I</value>                </directOrIndirectOwnership>                <natureOfOwnership>                    <value>By 401 (k) Plan</value>                </natureOfOwnership>            </ownershipNature>        </nonDerivativeHolding>    </nonDerivativeTable>    <derivativeTable>        <derivativeTransaction>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <conversionOrExercisePrice>                <value>8.70</value>            </conversionOrExercisePrice>            <transactionDate>                <value>2010-08-02</value>            </transactionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>M</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionAmounts>                <transactionShares>                    <value>149600</value>                    <footnoteId id="F1"/>                </transactionShares>                <transactionPricePerShare>                    <value>0</value>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <exerciseDate>                <value>2005-09-25</value>                <footnoteId id="F3"/>            </exerciseDate>            <expirationDate>                <value>2011-09-25</value>            </expirationDate>            <underlyingSecurity>                <underlyingSecurityTitle>                    <value>Common Stock</value>                </underlyingSecurityTitle>                <underlyingSecurityShares>                    <value>149600</value>                </underlyingSecurityShares>            </underlyingSecurity>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>290000</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </derivativeTransaction>        <derivativeTransaction>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <conversionOrExercisePrice>                <value>8.70</value>            </conversionOrExercisePrice>            <transactionDate>                <value>2010-08-03</value>            </transactionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>M</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionAmounts>                <transactionShares>                    <value>7677</value>                    <footnoteId id="F1"/>                </transactionShares>                <transactionPricePerShare>                    <value>0</value>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <exerciseDate>                <value>2005-09-25</value>                <footnoteId id="F3"/>            </exerciseDate>            <expirationDate>                <value>2011-09-25</value>            </expirationDate>            <underlyingSecurity>                <underlyingSecurityTitle>                    <value>Common Stock</value>                </underlyingSecurityTitle>                <underlyingSecurityShares>                    <value>7677</value>                </underlyingSecurityShares>            </underlyingSecurity>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>282323</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </derivativeTransaction>        <derivativeTransaction>            <securityTitle>                <value>Common Stock, $0.01 Par Value</value>            </securityTitle>            <conversionOrExercisePrice>                <value>8.70</value>            </conversionOrExercisePrice>            <transactionDate>                <value>2010-08-04</value>            </transactionDate>            <transactionCoding>                <transactionFormType>4</transactionFormType>                <transactionCode>M</transactionCode>                <equitySwapInvolved>0</equitySwapInvolved>            </transactionCoding>            <transactionAmounts>                <transactionShares>                    <value>142323</value>                    <footnoteId id="F1"/>                </transactionShares>                <transactionPricePerShare>                    <value>0</value>                </transactionPricePerShare>                <transactionAcquiredDisposedCode>                    <value>D</value>                </transactionAcquiredDisposedCode>            </transactionAmounts>            <exerciseDate>                <value>2005-09-25</value>                <footnoteId id="F3"/>            </exerciseDate>            <expirationDate>                <value>2011-09-25</value>            </expirationDate>            <underlyingSecurity>                <underlyingSecurityTitle>                    <value>Common Stock</value>                </underlyingSecurityTitle>                <underlyingSecurityShares>                    <value>142323</value>                </underlyingSecurityShares>            </underlyingSecurity>            <postTransactionAmounts>                <sharesOwnedFollowingTransaction>                    <value>140000</value>                </sharesOwnedFollowingTransaction>            </postTransactionAmounts>            <ownershipNature>                <directOrIndirectOwnership>                    <value>D</value>                </directOrIndirectOwnership>            </ownershipNature>        </derivativeTransaction>    </derivativeTable>    <footnotes>        <footnote id="F1">The option exercises and sales reported pursuant to this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.</footnote>        <footnote id="F2">Represents shares previously acquired in transactions exempt under Rule 16b-3(c)</footnote>        <footnote id="F3">Vested on September 25, 2005 (following the Company's common stock achieving a pre-established target price).</footnote>        <footnote id="F4">Represents the weighted average price of sales transacted on August 2, 2010; such sales were conducted through various transactions on August 2, 2010, at sales prices ranging from $40.00 to $40.29 per share.</footnote>        <footnote id="F5">Represents the weighted average price of sales transacted on August 4, 2010; such sales were conducted through various transactions on August 4, 2010, at sales prices ranging from $41.00 to $41.10 per share.</footnote>    </footnotes>    <ownerSignature>        <signatureName>/s/ John P. Kelly</signatureName>        <signatureDate>2010-08-04</signatureDate>    </ownerSignature></ownershipDocument>
