<PAGE> PAGE 1
000 B000000 12/31/97
000 C000000 0000882346
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 2.2.a
000 J000000 A
001 A000000 THE BLACKROCK INSURED MUNICIPAL TERM TRUST IN
001 B000000 811-6512
001 C000000 2127131442
002 A000000 1285 AVENUE OF THE AMERICAS
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10019
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A000001 BLACKROCK FINANCIAL MANAGEMENT INC.
008 B000001 A
008 C000001 801-032183
008 D010001 NEW YORK
008 D020001 NY
008 D030001 10154
010 A000001 MITCHELL HUTCHINS ASSET MANAGEMENT INC.
010 B000001 801-13219
010 C010001 NEW YORK
010 C020001 NY
010 C030001 10019
011 A000001 PAINEWEBBER INCORPORATED
011 B000001 8-16267
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10019
011 A000002 A.G. EDWARDS & SONS, INC.
011 B000002 8-13580
011 C010002 NEW YORK
<PAGE> PAGE 2
011 C020002 NY
011 C030002 00000
011 A000003 KIDDER, PEABODY & CO. INCORPORATED
011 B000003 8-4831
011 C010003 NEW YORK
011 C020003 NY
011 C030003 00000
011 A000004 PRUDENTIAL SECURITIES INCORPORATED
011 B000004 8-27154
011 C010004 NEW YORK
011 C020004 NY
011 C030004 00000
012 A000001 STATE STREET BANK AND TRUST COMPANY
012 B000001 85-05003
012 C010001 NORTH QUINCY
012 C020001 MA
012 C030001 02171
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 NEW YORK
013 B020001 NY
013 B030001 10281
013 B040001 1434
014 A000001 PAINEWEBBER INCORPORATED
014 B000001 8-16267
015 A000001 STATE STREET BANK & TRUST COMPANY
015 B000001 C
015 C010001 NORTH QUINCY
015 C020001 MA
015 C030001 02171
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 21
019 C000000 BLACKROCKF
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 PAINEWEBBER, INC.
022 B000001 13-2638166
022 C000001 11750
022 D000001 11550
022 A000002 MERRILL LYNCH PIERCE FENNER
022 B000002 13-5674085
<PAGE> PAGE 3
022 C000002 7622
022 D000002 5500
022 A000003 SMITH BARNEY
022 B000003 13-1912900
022 C000003 0
022 D000003 2361
022 A000004 CITICORP SECURITIES
022 C000004 1300
022 D000004 1300
022 A000005 LEHMAN BROTHERS
022 B000005 13-2518466
022 C000005 200
022 D000005 200
022 A000006 BEAR, STEARNS SECURITIES CORP
022 B000006 13-4946705
022 C000006 100
022 D000006 100
022 C000007 0
022 D000007 0
022 C000008 0
022 D000008 0
022 C000009 0
022 D000009 0
022 C000010 0
022 D000010 0
023 C000000 20972
023 D000000 21011
024 000000 N
025 D000001 0
025 D000002 0
025 D000003 0
025 D000004 0
025 D000005 0
025 D000006 0
025 D000007 0
025 D000008 0
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A010000 0
028 A020000 0
028 A030000 0
028 A040000 0
028 B010000 0
<PAGE> PAGE 4
028 B020000 0
028 B030000 0
028 B040000 0
028 C010000 0
028 C020000 0
028 C030000 0
028 C040000 0
028 D010000 0
028 D020000 0
028 D030000 0
028 D040000 0
028 E010000 0
028 E020000 0
028 E030000 0
028 E040000 0
028 F010000 0
028 F020000 0
028 F030000 0
028 F040000 0
028 G010000 0
028 G020000 0
028 G030000 0
028 G040000 0
028 H000000 0
030 A000000 0
030 B000000 0.00
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 0
035 000000 0
036 B000000 0
038 000000 0
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 0
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.350
048 A010000 0
048 A020000 0.000
048 B010000 0
<PAGE> PAGE 5
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0
048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 N
054 A000000 Y
054 B000000 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 Y
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 Y
054 N000000 N
054 O000000 N
055 A000000 Y
055 B000000 N
056 000000 N
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 Y
060 B000000 Y
061 000000 0
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
<PAGE> PAGE 6
062 D000000 0.0
062 E000000 0.1
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 142.6
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 0
063 B000000 9.8
064 A000000 Y
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 Y
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 Y
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 Y
070 I020000 N
070 J010000 N
070 J020000 N
070 K010000 N
070 K020000 N
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 Y
<PAGE> PAGE 7
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 N
070 P020000 N
070 Q010000 Y
070 Q020000 N
070 R010000 Y
070 R020000 N
071 A000000 10011
071 B000000 2361
071 C000000 412104
071 D000000 1
072 A000000 12
072 B000000 24395
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 1451
072 G000000 415
072 H000000 0
072 I000000 29
072 J000000 97
072 K000000 32
072 L000000 23
072 M000000 75
072 N000000 33
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 40
072 S000000 18
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 457
072 X000000 2670
072 Y000000 0
072 Z000000 21725
072AA000000 0
072BB000000 46
072CC010000 7583
072CC020000 0
072DD010000 20770
072DD020000 0
072EE000000 0
073 A010000 0.8000
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 0
<PAGE> PAGE 8
074 B000000 0
074 C000000 100
074 D000000 413559
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 7557
074 M000000 28
074 N000000 421244
074 O000000 0
074 P000000 161
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 1121
074 S000000 130000
074 T000000 289962
074 U010000 25886
074 U020000 0
074 V010000 11.20
074 V020000 0.00
074 W000000 0.0000
074 X000000 1447
074 Y000000 0
075 A000000 0
075 B000000 283531
076 000000 11.00
077 A000000 Y
077 B000000 Y
078 000000 N
080 A000000 AIG
080 B000000 GULF INSURANCE, FEDERAL INSURANCE
080 C000000 60000
081 A000000 Y
081 B000000 26
082 A000000 Y
082 B000000 500
083 A000000 N
083 B000000 0
084 A000000 N
084 B000000 0
085 A000000 Y
085 B000000 N
086 A010000 0
086 A020000 0
086 B010000 0
<PAGE> PAGE 9
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 BLACKROCK INSURED MUNICIPAL TERM TRUST INC.
087 A020000 0029506104
087 A030000 BMT
087 B010000 BLACKROCK INSURED MUNICIPAL TERM TRUST PF7
087 B020000 0092474204
087 C010000 BLACKROCK INSURED MUNICIPAL TERM TRUST PF28
087 C020000 0092474303
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 Y
SIGNATURE C. WILLIAM MAHER
TITLE ADMINISTRATOR
<TABLE> <S> <C>
<ARTICLE> 6
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1997
<PERIOD-END> DEC-31-1997
<INVESTMENTS-AT-COST> 371,581,916
<INVESTMENTS-AT-VALUE> 413,658,707
<RECEIVABLES> 7,557,256
<ASSETS-OTHER> 28,051
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 421,244,014
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,282,323
<TOTAL-LIABILITIES> 1,282,323
<SENIOR-EQUITY> 130,000,000
<PAID-IN-CAPITAL-COMMON> 240,092,544
<SHARES-COMMON-STOCK> 25,885,639
<SHARES-COMMON-PRIOR> 25,885,639
<ACCUMULATED-NII-CURRENT> 8,161,089
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (368,733)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 42,076,791
<NET-ASSETS> 289,961,691
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 24,394,746
<OTHER-INCOME> 0
<EXPENSES-NET> 2,669,786
<NET-INVESTMENT-INCOME> 21,724,960
<REALIZED-GAINS-CURRENT> (45,924)
<APPREC-INCREASE-CURRENT> 7,582,696
<NET-CHANGE-FROM-OPS> 29,261,732
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 20,770,173
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 8,491,559
<ACCUMULATED-NII-PRIOR> 7,206,302
<ACCUMULATED-GAINS-PRIOR> (322,809)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,451,253
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,669,786
<AVERAGE-NET-ASSETS> 283,531,000
<PER-SHARE-NAV-BEGIN> 10.87
<PER-SHARE-NII> .84
<PER-SHARE-GAIN-APPREC> .29
<PER-SHARE-DIVIDEND> (.8)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.20
<EXPENSE-RATIO> .94
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
INDEPENDENT AUDITORS' REPORT
To the Shareholders and Board of Directors of
The BlackRock Insured Municipal Term Trust, Inc.:
In planning and performing our audit of the financial statements of
The BlackRock Insured Municipal Term Trust, Inc. (the "Trust") for the
year ended December 31, 1997 (on which we have issued our report dated
February 13, 1998), we considered its internal control, including control
activities for safeguarding securities,in order to determine our auditing
procedures for the purpose of expressing our opinion on the financial
statements and to comply with the requirements of Form N-SAR, and not to
provide assurance on the Trust's internal control.
The management of the Trust is responsible for establishing and maintaining
internal control. In fulfilling this responsibility, estimates and
judgments by management are required to assess the expected benefits and
related costs of controls. Generally, controls that are relevant
to an audit pertain to the entity's objective of preparing financial
statements for external purposes that are fairly presented in conformity
with generally accepted accounting principles. Those controls include the
safeguarding of assets against unauthorized acquisition, use or disposition.
Because of inherent limitations in any internal control, errors
or fraud may occur and not be detected. Also, projection of any
evaluation of internal control to future periods is subject to the risk
that it may become inadequate because of changes in conditions or that the
effectiveness of the design and operation may deteriorate.
Our consideration of the Trust's internal control would not necessarily
disclose all matters in internal control that might be material weaknesses
under standards established by the American Institute of Certified Public
Accountants. A material weakness is a condition in which the design or
operation of one or more of the internal control components does not reduce
to a relatively low level the risk that errors or fraud in amounts
that would be material in relation to the financial statements being
audited may occur and not be detected within a timely period by employees
in the normal course of performing their assigned functions. However,
we noted no matters involving the Trust's internal control and its
operation, including controls for safeguarding
securities, that we consider to be material weaknesses as defined above
as of December 31, 1997.
This report is intended solely for the information and use of the
Trust's management and Board of Directors, and the Securities and Exchange
Commission.
Boston, Massachusetts
February 13, 1998
