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

SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934 (Amendment No.)

Filed by the Registrant [X]

Filed by a Party other than the Registrant [  ]

Check the appropriate box:

[  ]   Preliminary Proxy Statement
[  ]   Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
[  ]   Definitive Proxy Statement
[X]   Definitive Additional Materials
[  ]   Soliciting Material Under Rule 14a-12
Insured Municipal Income Fund Inc.
(Name of Registrant as Specified In Its Charter)

Payment of Filing Fee (Check the appropriate box):

[X]   No fee required.
     
[  ]   Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.
     
1)   Title of each class of securities to which transaction applies:
     
2)   Aggregate number of securities to which transaction applies:
     
     
3)   Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the filing fee is calculated and state how it was determined):
     
     
4)   Proposed maximum aggregate value of transaction:
     
     
5)   Total fee paid:
     
[  ]   Fee paid previously with preliminary materials:
     

[  ]   Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

  1)   Amount Previously Paid:
       
       
  2)   Form, Schedule or Registration Statement No.:
       
       
  3)   Filing Party:
       
       
  4)   Date Filed:
       

Insured Municipal Income Fund Inc.

51 West 52nd Street
New York, New York 10019-6114

June 5, 2009

Dear Valued Stockholder:

Important information regarding the annual stockholder meeting of Insured Municipal Income Fund Inc. is enclosed. We encourage you to review it carefully.

Unlike in some previous years, your broker CANNOT vote your shares without your specific instructions, so your prompt attention and vote should help your Fund minimize solicitation expenses.

For the reasons set forth in the proxy statement, we urge you to vote FOR your Fund’s highly experienced Board of Director nominees and proposals 3, 4 and 5. We recommend that you vote AGAINST proposal 6. Please use the WHITE proxy card to vote TODAY – by signing, dating and returning your WHITE proxy card in the enclosed postage-paid envelope.

On behalf of the Board of Directors, I thank you for your continued support.

Sincerely,

Richard Q. Armstrong
Independent Chairman of the Board


Insured Municipal Income Fund Inc.

51 West 52nd Street
New York, New York 10019-6114

June 5, 2009

Dear Valued Stockholder:

Important information regarding the annual stockholder meeting of Insured Municipal Income Fund Inc. is enclosed. We encourage you to review it carefully.

Unlike in some previous years, your broker CANNOT vote your shares without your specific instructions, so your prompt attention and vote should help your Fund minimize solicitation expenses.

For the reasons set forth in the proxy statement, we urge you to vote FOR your Fund’s highly experienced Board of Director nominees and proposals 3, 4 and 5. We recommend that you vote AGAINST proposal 6. Please use the WHITE proxy card to vote TODAY – by telephone, by internet or by signing, dating and returning your WHITE proxy card in the enclosed postage-paid envelope.

On behalf of the Board of Directors, I thank you for your continued support.

Sincerely,

Richard Q. Armstrong
Independent Chairman of the Board