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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 S8kIi6TmGfCWudnokMzmdPcGDxONrjjiWKJlfsDUD4DFtYbG43t+Kh0pCf+6x/sQ
 oHQwRCj/cLKgXueGfcoaRQ==

<SEC-DOCUMENT>0001140361-03-001690.txt : 20030523
<SEC-HEADER>0001140361-03-001690.hdr.sgml : 20030523
<ACCEPTANCE-DATETIME>20030522174657
ACCESSION NUMBER:		0001140361-03-001690
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030521
FILED AS OF DATE:		20030523

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KATY INDUSTRIES INC
		CENTRAL INDEX KEY:			0000054681
		STANDARD INDUSTRIAL CLASSIFICATION:	SPECIAL INDUSTRY MACHINERY, NEC [3559]
		IRS NUMBER:				751277589
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		6300 S SYRACUSE WAY STE 300
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111-6723
		BUSINESS PHONE:		3032909300

	MAIL ADDRESS:	
		STREET 1:		6300 S SYRACUSE WAY SUITE 300
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ROSENTHAL AMIR
		CENTRAL INDEX KEY:			0001194856

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05558
		FILM NUMBER:		03716942

	BUSINESS ADDRESS:	
		STREET 1:		C/O KATY INDUSTRIES INC
		STREET 2:		765 STRAITS TURNPIKE STE 2000
		CITY:			MIDDLEBURY
		STATE:			CT
		ZIP:			06762
		BUSINESS PHONE:		2035980397

	MAIL ADDRESS:	
		STREET 1:		C/O KATY INDUSTRIES INC
		STREET 2:		765 STRAITS TURNPIKE STE 2000
		CITY:			MIDDLEBURY
		STATE:			CT
		ZIP:			06762
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-05-21</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000054681</issuerCik>
        <issuerName>KATY INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>KT</issuerTradingSymbol>
</issuer>
<reportingOwner>
<reportingOwnerId>
            <rptOwnerCik>0001194856</rptOwnerCik>
            <rptOwnerName>ROSENTHAL AMIR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector>
<isOfficer>1</isOfficer>
<isTenPercentOwner>0</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle>VP CFO Gen Cnsl and Scrtry</officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<nonDerivativeSecurity>
<securityTitle>
<value>Common Stock</value>
</securityTitle>
<transactionDate>
<value>2003-05-21</value>
</transactionDate>
<deemedExecutionDate>
<value>2003-05-21</value>
</deemedExecutionDate>
<transactionCoding>
<transactionFormType>4</transactionFormType>
<transactionCode>P</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness>
<value></value>
</transactionTimeliness>
<transactionAmounts>
<transactionShares>
<value>5000</value>
</transactionShares>
<transactionValue>
<value>3.70</value>
</transactionValue>
<transactionAcquiredDisposedCode>
<value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts>
<sharesOwnedFollowingTransaction>
<value>10000</value>
<footnoteId id="F1"/>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature>
<directOrIndirectOwnership>
<value>D</value>
</directOrIndirectOwnership>
<natureOfOwnership>
<value></value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeSecurity>
<footnotes>
<footnote id="F1">Mr. Rosenthal has also been granted 250,000 options to purchase common stock, all of which have been reported on previous Form 4's.</footnote>
</footnotes>
<ownerSignature>
<signatureName>Amir Rosenthal</signatureName>
<signatureDate>2003-05-23</signatureDate>
</ownerSignature>
</ownershipDocument>

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