-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EIj+nNl+4LT2BbRqAVXvzPRjNb2IllYDLhHrvlDSJLDadU8Qnrb6kvbim2yle/Lq
 /0abViqliT/IzEE+/znEMQ==

<SEC-DOCUMENT>0000940394-03-000505.txt : 20030716
<SEC-HEADER>0000940394-03-000505.hdr.sgml : 20030716
<ACCEPTANCE-DATETIME>20030716105913
ACCESSION NUMBER:		0000940394-03-000505
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030701
FILED AS OF DATE:		20030716

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DWIGHT DONALD R
		CENTRAL INDEX KEY:			0001193494
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21226
		FILM NUMBER:		03788474

	BUSINESS ADDRESS:	
		STREET 1:		1414 AVE OF THE AMERICAS
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
		BUSINESS PHONE:		2124861445

	MAIL ADDRESS:	
		STREET 1:		C/O ROYCE & ASSOCIATES, LLC
		STREET 2:		1414 AVENUE OF THE AMERICAS
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <documentType>4</documentType>

    <periodOfReport>2003-07-01</periodOfReport>


    <notSubjectToSection16>1</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001193494</rptOwnerCik>
            <rptOwnerName>DWIGHT DONALD R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>


    <ownerSignature>
        <signatureName>Paul M. O'Neil, Attorney in Fact</signatureName>
        <signatureDate>2003-07-16</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----