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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 GyEulO6TJenBlv/9spz8v3KssVkdTxrXdPQ32zqDnCnhew/H9WA81xY2drj/5Elf
 AIRBq77wfccbrnw8zb1yeA==

<SEC-DOCUMENT>0001209191-03-018121.txt : 20030820
<SEC-HEADER>0001209191-03-018121.hdr.sgml : 20030820
<ACCEPTANCE-DATETIME>20030820165139
ACCESSION NUMBER:		0001209191-03-018121
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030818
FILED AS OF DATE:		20030820

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MARX CHRISTINE M
		CENTRAL INDEX KEY:			0001230445

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10466
		FILM NUMBER:		03858478

	BUSINESS ADDRESS:	
		STREET 1:		245 RIVERSIDE AVENUE
		STREET 2:		SUITE 500
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32202
		BUSINESS PHONE:		9043014450

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ST JOE CO
		CENTRAL INDEX KEY:			0000745308
		STANDARD INDUSTRIAL CLASSIFICATION:	LAND SUBDIVIDERS & DEVELOPERS (NO CEMETERIES) [6552]
		IRS NUMBER:				590432511
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		245 RIVERSIDE AVENUE STE 500
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32202
		BUSINESS PHONE:		9043014200

	MAIL ADDRESS:	
		STREET 1:		245 RIVERSIDE AVENUE
		STREET 2:		SUITE 500
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32202

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ST JOE CORP
		DATE OF NAME CHANGE:	19980430

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ST JOE PAPER CO
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-18</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000745308</issuerCik><issuerName>ST JOE CO</issuerName>        <issuerTradingSymbol>Joe</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001230445</rptOwnerCik><rptOwnerName>MARX CHRISTINE M</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>245 RIVERSIDE AVENUE</rptOwnerStreet1><rptOwnerStreet2>SUITE 500</rptOwnerStreet2><rptOwnerCity>JACKSONVILLE</rptOwnerCity><rptOwnerState>FL</rptOwnerState><rptOwnerZipCode>32202</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>General Counsel</officerTitle></reportingOwnerRelationship></reportingOwner><derivat
iveTable><derivativeTransaction><securityTitle><value>Common</value></securityTitle><conversionOrExercisePrice><value>32.65</value></conversionOrExercisePrice><transactionDate><value>2003-08-18</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>40000</value></transactionShares><transactionPricePerShare><value>0</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-08-18</value><footnoteId id="F1" /></exerciseDate><expirationDate><value>2013-08-18</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common</value></underlyingSecurityTitle><underlyingSecurityShares><value>40000</value></underlyingSecurityShares></underlyingSecurity><postTran
sactionAmounts><sharesOwnedFollowingTransaction><value>40000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">The options vest in four equal installments commencing August 18, 2004.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>/s/ Christine M. Marx</signatureName><signatureDate>2003-08-20</signatureDate></ownerSignature></ownershipDocument>

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