<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2004-01-15</periodOfReport>
    <issuer>
        <issuerCik>0000098246</issuerCik>
        <issuerName>TIFFANY &amp; CO</issuerName>
        <issuerTradingSymbol>TIF</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001192023</rptOwnerCik>
            <rptOwnerName>PRESBY J THOMAS</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TIFFANY &amp; CO.</rptOwnerStreet1>
            <rptOwnerStreet2>727 FIFTH AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Non-Qualified Stock Option (Right to Buy)</value></securityTitle><conversionOrExercisePrice><value>39.75</value></conversionOrExercisePrice><transactionDate><value>2004-01-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1"/></transactionCoding><transactionAmounts><transactionShares><value>7500</value></transactionShares><transactionPricePerShare><value>0</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><footnoteId id="F2"/></exerciseDate><expirationDate><value>2014-01-15</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>7500</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>7500</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Granted Pursuant to the Tiffany &amp; Co. 1998 Directors Opton Plan, which complies with Rule 16(b)-3.  </footnote><footnote id="F2">The option vests in two equal installments on January 15, 2005 and 2006.</footnote></footnotes><remarks/><ownerSignature><signatureName>Patrick B. Dorsey, Attorney-in-Fact for Thomas J. Presby </signatureName><signatureDate>2004-01-16</signatureDate></ownerSignature></ownershipDocument>
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X0201
4
2004-01-15
0000098246
TIFFANY & CO
TIF
0001192023
PRESBY J THOMAS
TIFFANY & CO.
727 FIFTH AVENUE
NEW YORK
NY
10022
1
0
0
0
Non-Qualified Stock Option (Right to Buy)
39.75
2004-01-15
4
A
0
7500
0
A
2014-01-15
Common Stock
7500
7500
D
Granted Pursuant to the Tiffany & Co. 1998 Directors Opton Plan, which complies with Rule 16(b)-3.
The option vests in two equal installments on January 15, 2005 and 2006.
Patrick B. Dorsey, Attorney-in-Fact for Thomas J. Presby
2004-01-16