-----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,
 HUjsdWjW77Fk7E16Q3VpMzEkQa+ubEZe6MwL3qv6zH12SSv452YbaurcimHA7wo6
 yD/+qs7xSgUFFrK397Zwqw==

<SEC-DOCUMENT>0000930413-06-006442.txt : 20060829
<SEC-HEADER>0000930413-06-006442.hdr.sgml : 20060829
<ACCEPTANCE-DATETIME>20060829163711
ACCESSION NUMBER:		0000930413-06-006442
CONFORMED SUBMISSION TYPE:	N-PX
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060630
FILED AS OF DATE:		20060829
DATE AS OF CHANGE:		20060829
EFFECTIVENESS DATE:		20060829

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK INSURED MUNICIPAL INCOME TRUST
		CENTRAL INDEX KEY:			0001181187
		IRS NUMBER:				816105962
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0831

	FILING VALUES:
		FORM TYPE:		N-PX
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-21178
		FILM NUMBER:		061062943

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		888-825-2257

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKROCK MUNICIPAL INCOME TRUST III
		DATE OF NAME CHANGE:	20020819
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-PX
<SEQUENCE>1
<FILENAME>c43996_npx.txt
<TEXT>

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

                                    FORM N-PX

          ANNUAL REPORT OF PROXY VOTING RECORD OF REGISTERED MANAGEMENT
                               INVESTMENT COMPANY

Investment Company Act File Number:  811-21178

                    BlackRock Insured Municipal Income Trust
                     --------------------------------------
               (Exact name of registrant as specified in charter)

                    100 Bellevue Parkway, Wilmington DE 19809
                    -----------------------------------------
               (Address of principal executive offices) (Zip code)

                           Robert S. Kapito, President
                               40 East 52nd Street
                            New York, New York 10022
                         ------------------------------
                     (name and address of agent for service)

Registrant's telephone number, including area code: (888) 825-2257

Date of fiscal year end: 8/31

Date of reporting period:  07/01/2005 - 06/30/2006

<PAGE>


=================== BLACKROCK INSURED MUNICIPAL INCOME TRUST ===================

ITEM 1 PROXY VOTING RECORD

There were no matters relating to a portfolio security considered at any
shareholder meeting held during the period ended June 30, 2006 with respect to
which the registrant was entitled to vote.


<PAGE>
                                   SIGNATURES

         Pursuant to the requirements of the Investment Company Act of 1940, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                                   BlackRock Insured Municipal Income Trust



                    by /s/ Robert S. Kapito
                      ---------------------------
                      Robert S. Kapito
                      Principal Executive Officer

Date:  August 26, 2006
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
