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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,
 JG8o/7Y1KLXAsZYFkGsrv8pObzXYXJItnL0kz1HVUCeFAJXBZkbHJGM/PIDptGxH
 f+3IcgBJdvppqbWSvw+kLQ==

<SEC-DOCUMENT>0000940394-07-000338.txt : 20070330
<SEC-HEADER>0000940394-07-000338.hdr.sgml : 20070330
<ACCEPTANCE-DATETIME>20070330104245
ACCESSION NUMBER:		0000940394-07-000338
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070305
FILED AS OF DATE:		20070330
DATE AS OF CHANGE:		20070330

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EATON VANCE INSURED OHIO  MUNICIPAL BOND FUND
		CENTRAL INDEX KEY:			0001196876
		IRS NUMBER:				000000000

	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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WHITAKER WHARTON P
		CENTRAL INDEX KEY:			0001226183

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21226
		FILM NUMBER:		07730096

	BUSINESS ADDRESS:	
		STREET 1:		C/O EATON VANCE
		STREET 2:		255 STATE STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
		BUSINESS PHONE:		6174828260
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>whi25.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-03-05</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001226183</rptOwnerCik>
            <rptOwnerName>WHITAKER WHARTON P</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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Mgmt Comm of EV</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By: Paul M. O'Neil, Attorney in Fact</signatureName>
        <signatureDate>2007-03-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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