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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000940394-04-000373.txt : 20040422
<SEC-HEADER>0000940394-04-000373.hdr.sgml : 20040422
<ACCEPTANCE-DATETIME>20040422105626
ACCESSION NUMBER:		0000940394-04-000373
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040415
FILED AS OF DATE:		20040422

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BIBLIOWICZ JESSICA M
		CENTRAL INDEX KEY:			0001246102

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21226
		FILM NUMBER:		04747202

	MAIL ADDRESS:	
		STREET 1:		C/O EATON VANCE
		STREET 2:		THE EATON VANCE BLDG., 255 STATE ST.
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EATON VANCE INSURED OHIO  MUNICIPAL BOND FUND
		CENTRAL INDEX KEY:			0001196876

	BUSINESS ADDRESS:	
		STREET 1:		EATON VANCE BLDG
		STREET 2:		255 STATE STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
		BUSINESS PHONE:		6174828260

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	EATON VANCE INSURED OHIO  MUNICIPAL BOND FUND I
		DATE OF NAME CHANGE:	20021007
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>bib13.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-04-15</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001196876</issuerCik>
        <issuerName>EATON VANCE INSURED OHIO  MUNICIPAL BOND FUND</issuerName>
        <issuerTradingSymbol>EIO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001246102</rptOwnerCik>
            <rptOwnerName>BIBLIOWICZ JESSICA M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>THE EATON VANCE BUILDING</rptOwnerStreet1>
            <rptOwnerStreet2>255 STATE STREET</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02109</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By: Paul M. O'Neil, Attorney in Fact</signatureName>
        <signatureDate>2004-04-22</signatureDate>
    </ownerSignature>
</ownershipDocument>

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