-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0000916076-07-000133.txt : 20070823
<SEC-HEADER>0000916076-07-000133.hdr.sgml : 20070823
<ACCEPTANCE-DATETIME>20070823114129
ACCESSION NUMBER:		0000916076-07-000133
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070821
FILED AS OF DATE:		20070823
DATE AS OF CHANGE:		20070823

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MARTIN MARIETTA MATERIALS INC
		CENTRAL INDEX KEY:			0000916076
		STANDARD INDUSTRIAL CLASSIFICATION:	MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
		IRS NUMBER:				561848578
		STATE OF INCORPORATION:			NC
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2710 WYCLIFF RD
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27607
		BUSINESS PHONE:		9197814550

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ZELNAK STEPHEN P JR
		CENTRAL INDEX KEY:			0001084501
		STANDARD INDUSTRIAL CLASSIFICATION:	MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
		STATE OF INCORPORATION:			NC
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12744
		FILM NUMBER:		071074844

	BUSINESS ADDRESS:	
		STREET 1:		2710 WYCLIFF RD
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27607
		BUSINESS PHONE:		9197814550

	MAIL ADDRESS:	
		STREET 1:		MARTIN MARIETTA MATERIALS INC
		STREET 2:		2710 WYCLIFF ROAD
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27607
</SEC-HEADER>
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<SEQUENCE>1
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    <periodOfReport>2007-08-21</periodOfReport>

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        <issuerName>MARTIN MARIETTA MATERIALS INC</issuerName>
        <issuerTradingSymbol>MLM</issuerTradingSymbol>
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            <rptOwnerState>NC</rptOwnerState>
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            <otherText></otherText>
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    <derivativeTable>
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            <conversionOrExercisePrice>
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            </conversionOrExercisePrice>
            <transactionDate>
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            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            </expirationDate>
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                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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            <exerciseDate>
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            <underlyingSecurity>
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                <underlyingSecurityShares>
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                <value></value>
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                <transactionShares>
                    <value>9762</value>
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                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F4"/>
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            <expirationDate>
                <value>2013-05-24</value>
            </expirationDate>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <underlyingSecurityShares>
                    <value>9762</value>
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                    <value>19525</value>
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    <footnotes>
        <footnote id="F3">Non-qualified stock option award granted under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan.  Options become exercisable in three equal annual installments commencing one year from the date of grant.</footnote>
        <footnote id="F1">This price is the weighted average sales price per share of all shares sold on this date.  The actual sales prices were 200 @$125.16; 100 @$125.24; 100 @$125.29; 100 @$125.30; 400 @$125.36; 100 @$125.39; 100 @$125.40; 200 @$125.42; 300 @$125.45; 400 @$125.47; 100 @$125.48; 200 @$125.49; 100 @$125.50; 300 @$125.52; 100 @$125.53; 800 @$125.55; 200 @$125.56; 100@$125.57; 100 @$125.58; 100 @$125.59; 800 @$125.60; 200 @$125.62; 400 @$125.65; 200 @$125.67; 100 @$125.68; 100 @$125.69; 300 @$125.70; 100 @$125.72; 300 @$125.73; 100 @$125.75; 100 @$125.76; 100 @$125.80; 200 @$125.84; 200 @$125.85; 200 @$125.87; 100 @$125.93; 200 @$125.96; 200 @$125.97; 300 @$125.99; 800 @$126.00; 200 @$126.01; 100 @$126.02; 200 @$126.04; 700 @$126.07; 200 @$126.09; 500 @$126.10; 400 @$126.11; 200 @$126.12; 100 @$126.14; 200 @$126.15; 300 @$126.17; 200 @$126.18; 200 @$126.22; 400 @$126.23; 3400 @$126.24; 734 @$126.25; 100 @$126.26; 100 @$126.31, 200 @$126.32, 100 @$126.44, 200 @$126.45, 100 @$126.49</footnote>

        <footnote id="F2">Weighted avg. sales price per sh of all shs sold on this date.  The actual sales prices were 400@131.55; 100@131.56;200@131.58;100@131.62;300@131.67;400@131.71;100@131.72;200@131.79; 100@131.90;200@131.94;600@131.99;1500@132.00;100@132.01;400@132.05;100@132.10; 100@132.11;100@132.19;600@132.25;100@132.26;100@132.28;100@132.29;100@132.30; 200@132.31;300@132.32;200@132.33;700@132.35;100@132.36;100@132.38;277@132.39 100@132.40;100@132.41;100@132.49;100@132.50;100@132.51;100@132.59;500@132.62; 100@132.73;100@132.76;200@132.86;200@132.88;100@132.94;200@132.95;300@132.97; 400@132.99;3400@133.00;100@133.04;200@133.08;300@133.10;100@133.14;100@133.18; 100@133.25;100@133.34;100@133.46;200@133.47;200@133.48;100@133.49;100@133.54; 100@133.59,200@133.67;100@133.71;100@133.85;100@133.86;200@133.90;100@134.01, 100@134.02,100@134.09;100@134.10;100@134.12;100@134.13;100@134.16;500@134.24, 200@134.25,800@134.26;300@134.27;200@134.28;100@134.36;100@134.38;100@134.40, 100@134.58</footnote>
        <footnote id="F4">Non-qualified stock option award granted under the Martin Marietta Materials, Inc. Amended and Restated Stock-Based Award Plan.  Options become exercisable in four equal annual installments commencing one year from the date of grant.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Stephen P. Zelnak, Jr.</signatureName>
        <signatureDate>2007-08-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
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-----END PRIVACY-ENHANCED MESSAGE-----