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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0000930413-03-001357.txt : 20030428
<SEC-HEADER>0000930413-03-001357.hdr.sgml : 20030428
<ACCEPTANCE-DATETIME>20030428170615
ACCESSION NUMBER:		0000930413-03-001357
CONFORMED SUBMISSION TYPE:	NSAR-A
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20030228
FILED AS OF DATE:		20030428
EFFECTIVENESS DATE:		20030428

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK INSURED MUNICIPAL INCOME TRUST
		CENTRAL INDEX KEY:			0001181187
		IRS NUMBER:				816105962

	FILING VALUES:
		FORM TYPE:		NSAR-A
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-21178
		FILM NUMBER:		03667290

	BUSINESS ADDRESS:	
		STREET 1:		40 EAST 52ND STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		2127545300

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKROCK MUNICIPAL INCOME TRUST III
		DATE OF NAME CHANGE:	20020819
</SEC-HEADER>
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<FILENAME>c28087_nsara.fil
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<PAGE>      PAGE  1
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000 J000000 A
001 A000000 BLACKROCK INSURED MUNICIPAL INCOME TRUST
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008 B000001 A
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008 A000002 BLACKROCK FINANCIAL MANAGEMENT,INC.
008 B000002 S
008 C000002 801-48433
008 D010002 NEW YORK
008 D020002 NY
008 D030002 10022
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012 B000001 85-11340
012 C010001 CANTON
012 C020001 MA
012 C030001 02021
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013 B010001 BOSTON
<PAGE>      PAGE  2
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013 B030001 02116
014 A000001 BLACKROCK INVESTMENTS, INC.
014 B000001 8-048436
014 A000002 NORTHERN FUND DISTRIBUTORS, LLC
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014 A000003 PNC CAPITAL MARKETS, INC.
014 B000003 8-032493
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014 B000004 8-033133
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014 B000005 8-045467
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022 B000001 04-1867445
022 C000001    197000
<PAGE>      PAGE  3
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022 A000002 CHASE SECURITIES INC.
022 B000002 13-3379014
022 C000002    286860
022 D000002     25246
022 A000003 UBS PAINEWEBBER INC.
022 B000003 13-3873456
022 C000003    114248
022 D000003    116529
022 A000004 GOLDMAN SACHS & CO.
022 B000004 13-5108880
022 C000004    146687
022 D000004     22671
022 A000005 LEHMAN BROTHERS INC.
022 B000005 13-2726611
022 C000005     90326
022 D000005     57497
022 A000006 RAYMOND JAMES & ASSOCIATES
022 B000006 59-1237041
022 C000006    110616
022 D000006     12279
022 A000007 SALOMON SMITH BARNEY INC.
022 B000007 13-3082694
022 C000007     79748
022 D000007     27747
022 A000008 MERRILL LYNCH PIERCE
022 B000008 13-5674085
022 C000008     37584
022 D000008     14580
022 A000009 DBTC AMERICAS/BANC ONE
022 B000009 36-3595942
022 C000009     20528
022 D000009     30900
022 A000010 MORGAN STANLEY & CO.
022 B000010 13-2655998
022 C000010      6215
022 D000010     15985
023 C000000    1146098
023 D000000     640449
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<PAGE>      PAGE  4
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<PAGE>      PAGE  6
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SIGNATURE   HENRY GABBAY
TITLE       TREASURER


</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77Q3
<SEQUENCE>3
<FILENAME>c28087_ex99-77q3.txt
<TEXT>
CERTIFICATIONS

         I, Robert S. Kapito, certify that:

         1.    I have reviewed this report on Form N-SAR of BlackRock Insured
               Municipal Income Trust;

         2.    Based on my knowledge, this report does not contain any untrue
               statement of a material fact or omit to state a material fact
               necessary to make the statements made, in light of the
               circumstances under which such statements were made, not
               misleading with respect to the period covered by this report;

         3.    Based on my knowledge, the financial information included in this
               report, and the financial statements on which the financial
               information is based, fairly present in all material respects the
               financial condition, results of operations, changes in net
               assets, and cash flows (if the financial statements are required
               to include a statement of cash flows) of the registrant as of,
               and for, the periods presented in this report;

         4.    The registrant's other certifying officers and I are responsible
               for establishing and maintaining disclosure controls and
               procedures (as defined in rule 30a-2(c) under the Investment
               Company Act) for the registrant and have;

               a.  designed such disclosure controls and procedures to ensure
                   that material information relating to the registrant,
                   including its consolidated subsidiaries, is made known to us
                   by others within those entities, particularly during the
                   period in which this report is being prepared;

               b.  evaluated the effectiveness of the registrant's disclosure
                   controls and procedures as of a date within 90 days prior to
                   the filing date of this report (the "Evaluation Date"); and

               c.  presented in this report our conclusions about the
                   effectiveness of the disclosure controls and procedures based
                   on our evaluation as of the Evaluation Date;

         5.    The registrant's other certifying officers and I have disclosed,
               based

                                       1
<PAGE>

               on our most recent evaluation, to the registrant's auditors and
               the audit committee of the registrant's board of directors (or
               persons performing the equivalent functions):

               a.  all significant deficiencies in the design or operation of
                   internal controls which could adversely affect the
                   registrant's ability to record, process, summarize, and
                   report financial data and have identified for the
                   registrant's auditors any material weaknesses in internal
                   controls; and

               b.  any fraud, whether or not material, that involves management
                   or other employees who have a significant role in the
                   registrant's internal controls; and

         6.    The registrant's other certifying officers and I have indicated
               in this report whether or not there were significant changes in
               internal controls or in other factors that could significantly
               affect internal controls subsequent to the date of our most
               recent evaluation, including any corrective actions with regard
               to significant deficiencies and material weaknesses.

Date:   April 28, 2003
      ------------------

                                             /s/ Robert S. Kapito
                                             --------------------
                                             Robert S. Kapito
                                             Trustee, President, Chief Executive
                                             Officer



                                       2
<PAGE>

CERTIFICATIONS

         I, Henry Gabbay, certify that:

         1.    I have reviewed this report on Form N-SAR of BlackRock Insured
               Municipal Income Trust;

         2.    Based on my knowledge, this report does not contain any untrue
               statement of a material fact or omit to state a material fact
               necessary to make the statements made, in light of the
               circumstances under which such statements were made, not
               misleading with respect to the period covered by this report;

         3.    Based on my knowledge, the financial information included in this
               report, and the financial statements on which the financial
               information is based, fairly present in all material respects the
               financial condition, results of operations, changes in net
               assets, and cash flows (if the financial statements are required
               to include a statement of cash flows) of the registrant as of,
               and for, the periods presented in this report;

         4.    The registrant's other certifying officers and I are responsible
               for establishing and maintaining disclosure controls and
               procedures (as defined in rule 30a-2(c) under the Investment
               Company Act) for the registrant and have;

               a.  designed such disclosure controls and procedures to ensure
                   that material information relating to the registrant,
                   including its consolidated subsidiaries, is made known to us
                   by others within those entities, particularly during the
                   period in which this report is being prepared;

               b.  evaluated the effectiveness of the registrant's disclosure
                   controls and procedures as of a date within 90 days prior to
                   the filing date of this report (the "Evaluation Date"); and

               c.  presented in this report our conclusions about the
                   effectiveness of the disclosure controls and procedures based
                   on our evaluation as of the Evaluation Date;

         5.    The registrant's other certifying officers and I have disclosed,
               based

                                       1

<PAGE>

               on our most recent evaluation, to the registrant's auditors and
               the audit committee of the registrant's board of directors (or
               persons performing the equivalent functions):

               a.  all significant deficiencies in the design or operation of
                   internal controls which could adversely affect the
                   registrant's ability to record, process, summarize, and
                   report financial data and have identified for the
                   registrant's auditors any material weaknesses in internal
                   controls; and

               b.  any fraud, whether or not material, that involves management
                   or other employees who have a significant role in the
                   registrant's internal controls; and

         6.    The registrant's other certifying officers and I have indicated
               in this report whether or not there were significant changes in
               internal controls or in other factors that could significantly
               affect internal controls subsequent to the date of our most
               recent evaluation, including any corrective actions with regard
               to significant deficiencies and material weaknesses.

Date:  April 28, 2003
     -----------------

                                            /s/ Henry Gabbay
                                            -----------------
                                            Henry Gabbay
                                            Treasurer and Principal Financial
                                            Officer



                                       2

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