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FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person*
Gemma Maureen A.

(Last)(First)(Middle)
THE EATON VANCE BUILDING, 255 STATE STREET

(Street)
BOSTONMA02109

(City)(State)(Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
06/03/2008
3. Issuer Name and Ticker or Trading Symbol
EATON VANCE INSURED OHIO MUNICIPAL BOND FUND [EIO]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
Officer (give title below)XOther (specify below)
Management Committee of EV
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)4. Conversion or Excercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
No securities are beneficially owned

By: Paul M. O'Neil, Attorney in Fact06/06/2008
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Maureen A. Gemma

                           LIMITED POWER OF ATTORNEY
                                      FOR
                   EATON VANCE CLOSED-END FUNDS COMMON STOCK
                             SECTION 16(a) FILINGS

Know all by these presents, that the undersigned hereby constitutes and appoints
each of Paul M. O'Neil and A. John Murphy,  signing  singly,  the  undersigned's
true and lawful attorney-in-fact to:


(1)  Execute  for and on  behalf of and in the name of the  undersigned,  in the
     undersigned's capacity as an officer,  director and/or stockholder of Eaton
     Vance Closed-End Funds (the  "Companies")  listed in Appendix A Forms 3, 4,
     and 5 and  amendments  thereto  regarding  Common Stock of the Companies in
     accordance  with Section 16(a) of the  Securities  Exchange Act of 1934 and
     the rules thereunder;

(2)  Do and perform any and all acts for and on behalf of the undersigned  which
     may be  necessary  or desirable to complete and execute any such Form 3, 4,
     or 5 or amendment  thereto and timely file such form with the United States
     Securities  and Exchange  Commission  (the "SEC") and any stock exchange or
     similar authority; and

(3)  Take any other action of any type whatsoever  which, in the opinion of such
     attorney-in-fact,  may be necessary or  desirable  in  connection  with the
     foregoing  authority,  it being  understood that the documents  executed by
     such  attorney-in-fact on behalf of the undersigned  pursuant to this Power
     of  Attorney  shall be in such  form  and  shall  contain  such  terms  and
     conditions as such attorney-in-fact may approve.

     The undersigned hereby grants to each such  attorney-in-fact full power and
     authority  to do and  perform  any  and  every  act  and  thing  whatsoever
     requisite,  necessary,  or proper to be done in the  exercise of any of the
     rights and powers herein  granted,  as fully to all intents and purposes as
     the undersigned might or could do if personally present, with full power of
     substitution or revocation,  hereby  ratifying and confirming all that such
     attorney-in-fact,  or such  attorney-in-fact's  substitute or  substitutes,
     shall  lawfully  do or cause to be done by virtue of this Power of Attorney
     and the rights and powers herein granted. The undersigned acknowledges that
     the foregoing attorneys-in-fact, in serving in such capacity at the request
     of the undersigned,  are not assuming,  nor are the Companies assuming, any
     of the  undersigned's  responsibilities  to comply  with  Section 16 of the
     Securities Exchange Act of 1934 and the rules thereunder.

     This Power of  Attorney  shall  remain in full  force and effect  until the
     undersigned is no longer required to file Forms 3, 4, and 5 with respect to
     the  undersigned's  holdings  of and  transaction  in  Common  Stock of the
     Companies,  unless earlier  revoked by the  undersigned in a signed writing
     delivered to the foregoing attorneys-in-fact. This Power of Attorney may be
     filed  with the SEC as a  confirming  statement  of the  authority  granted
     herein.

     IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
     executed as of this 1st day of November, 2007.


                                       Maureen A. Gemma
                                       ---------------------
                                       Print Name of Reporting Person or Entity

                                       /s/ Maureen A. Gemma
                                       --------------------------
                                       Signature

                                                                      APPENDIX A

CLOSED-END/INTERVAL FUNDS

Eaton Vance Prime Rate Reserves
EV Classic Senior Floating-Rate Fund
Eaton Vance Advisers Senior Floating-Rate Fund
Eaton Vance Institutional Senior Floating-Rate Fund

Eaton Vance Senior Income Trust
Eaton Vance California Municipal Income Trust
Eaton Vance Florida Municipal Income Trust
Eaton Vance Massachusetts Municipal Income Trust
Eaton Vance Michigan Municipal Income Trust
Eaton Vance Municipal Income Trust
Eaton Vance New Jersey Municipal Income Trust
Eaton Vance New York Municipal Income Trust
Eaton Vance Ohio Municipal Income Trust
Eaton Vance Pennsylvania Municipal Income Trust
Eaton Vance Insured California Municipal Bond Fund
Eaton Vance Insured California Municipal Bond Fund II
Eaton Vance Insured Florida Municipal Bond Fund
Eaton Vance Insured Massachusetts Municipal Bond Fund
Eaton Vance Insured Michigan Municipal Bond Fund
Eaton Vance Insured Municipal Bond Fund
Eaton Vance Insured Municipal Bond Fund II
Eaton Vance Insured New Jersey Municipal Bond Fund
Eaton Vance Insured New York Municipal Bond Fund
Eaton Vance Insured New York Municipal Bond Fund II
Eaton Vance Insured Ohio Municipal Bond Fund
Eaton Vance Insured Pennsylvania Municipal Bond Fund
Eaton Vance Limited Duration Income Fund
Eaton Vance Tax-Advantaged Dividend Income Fund
Eaton Vance Tax-Advantaged Global Dividend Income Fund
Eaton Vance Tax-Advantaged Global Dividend Opportunities Fund
Eaton Vance Senior Floating-Rate Trust
Eaton Vance Floating-Rate Income Trust
Eaton Vance Enhanced Equity Income Fund
Eaton Vance Enhanced Equity Income Fund II
Eaton Vance Short Duration Diversified Income Fund
Eaton Vance Tax-Managed Buy-Write Income Fund
Eaton Vance Tax-Managed Buy-Write Opportunities Fund
Eaton Vance Tax-Managed Diversified Equity Income Fund
Eaton Vance Tax-Managed Global Buy-Write Opportunities Fund
Eaton Vance Tax-Managed Global Diversified Equity Income Fund
Eaton Vance Credit Opportunities Fund
Eaton Vance Risk-Managed Diversified Equity Income Fund

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