-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 E7vlmnyIKzMXbByRwcmqS9YKpqLn7CDVl1OSUH1BoUWDfmAp7FxD6KRNlHPKXj57
 TbmkNZICIynBWBvNY0gu2g==

<SEC-DOCUMENT>0001208669-04-000011.txt : 20040624
<SEC-HEADER>0001208669-04-000011.hdr.sgml : 20040624
<ACCEPTANCE-DATETIME>20040624113941
ACCESSION NUMBER:		0001208669-04-000011
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040622
FILED AS OF DATE:		20040624

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CORNING INC /NY
		CENTRAL INDEX KEY:			0000024741
		STANDARD INDUSTRIAL CLASSIFICATION:	DRAWING AND INSULATING NONFERROUS WIRE [3357]
		IRS NUMBER:				160393470
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1228

	BUSINESS ADDRESS:	
		STREET 1:		ONE RIVERFRONT PLAZA
		CITY:			CORNING
		STATE:			NY
		ZIP:			14831
		BUSINESS PHONE:		6079749000

	MAIL ADDRESS:	
		STREET 1:		ONE RIVERFRONT PLAZA
		CITY:			CORNING
		STATE:			NY
		ZIP:			14831

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CORNING GLASS WORKS
		DATE OF NAME CHANGE:	19890512

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HOUGHTON JAMES R
		CENTRAL INDEX KEY:			0001208669

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03247
		FILM NUMBER:		04878767

	BUSINESS ADDRESS:	
		STREET 1:		80 EAST MARKET ST
		STREET 2:		SUITE 300
		CITY:			CORNING
		STATE:			NY
		ZIP:			14830
		BUSINESS PHONE:		6079626876

	MAIL ADDRESS:	
		STREET 1:		80 E. MARKET ST.
		STREET 2:		SUITE 300
		CITY:			CORNING
		STATE:			NY
		ZIP:			14830
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-06-22</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000024741</issuerCik>
        <issuerName>CORNING INC /NY</issuerName>
        <issuerTradingSymbol>GLW</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001208669</rptOwnerCik>
            <rptOwnerName>HOUGHTON JAMES R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>80 E. MARKET ST.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>CORNING</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>14830</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman of the Board &amp; CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Phantom Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-06-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>268.84</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>12.25</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>268.84</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13784.35</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The reported Phantom Stock Units are acquired on a monthly basis pursuant to the terms of Corning's Supplemental Investment Plan and will be settled for cash at fair market value on or after the reporting person's retirement or other termination of service.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>J. Philip Hunter, as Attorney-in-Fact pursuant to Power of Attorney dated December 20, 2002, the original of which was filed with Form 4 dated January 6, 2003</signatureName>
        <signatureDate>2004-06-24</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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