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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 LpzVw4Qvfs9zCeum4kBKRxtBT1OpLIMH1S5n81+v7zVPAbljSqdrZ05bUowWBYDk
 tbMcF32JTnLmJjaweKL7QA==

<SEC-DOCUMENT>0001179110-10-004559.txt : 20100304
<SEC-HEADER>0001179110-10-004559.hdr.sgml : 20100304
<ACCEPTANCE-DATETIME>20100304211320
ACCESSION NUMBER:		0001179110-10-004559
CONFORMED SUBMISSION TYPE:	5
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20091231
FILED AS OF DATE:		20100304
DATE AS OF CHANGE:		20100304

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HOYT DANIEL D
		CENTRAL INDEX KEY:			0001459456

	FILING VALUES:
		FORM TYPE:		5
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	002-93277-D
		FILM NUMBER:		10658901

	MAIL ADDRESS:	
		STREET 1:		144 BUENA VISTA, P.O. BOX 742
		CITY:			STINSON BEACH
		STATE:			CA
		ZIP:			94970

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MEDIZONE INTERNATIONAL INC
		CENTRAL INDEX KEY:			0000753772
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-DRUGS PROPRIETARIES & DRUGGISTS' SUNDRIES [5122]
		IRS NUMBER:				870412648
		STATE OF INCORPORATION:			NV
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		144 BUENA VISTA
		CITY:			STINSON BEACH
		STATE:			CA
		ZIP:			94970
		BUSINESS PHONE:		4158680300

	MAIL ADDRESS:	
		STREET 1:		P.O. BOX 742
		CITY:			STINSON BEACH
		STATE:			CA
		ZIP:			94970

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MADISON FUNDING INC
		DATE OF NAME CHANGE:	19860413
</SEC-HEADER>
<DOCUMENT>
<TYPE>5
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 5 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>5</documentType>

    <periodOfReport>2009-12-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>0</form4TransactionsReported>

    <issuer>
        <issuerCik>0000753772</issuerCik>
        <issuerName>MEDIZONE INTERNATIONAL INC</issuerName>
        <issuerTradingSymbol>MZEI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001459456</rptOwnerCik>
            <rptOwnerName>HOYT DANIEL D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>144 BUENA VISTA, P.O. BOX 742</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>STINSON BEACH</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94970</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7948973</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/S/ DANIEL D. HOYT</signatureName>
        <signatureDate>2010-03-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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