<PAGE> PAGE 1
000 A000000 09/30/96
000 C000000 320282
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0
000 J000000 A
001 A000000 SMITH BARNEY MUNICIPAL MONEY MARKET FUND,INC.
001 B000000 811-3112
001 C000000 2128166560
002 A000000 388 GREENWICH STREET
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10013
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 SMITH BARNEY
008 B000001 A
008 C000001 801-3389
008 D010001 NEW YORK
008 D020001 NY
008 D030001 10013
010 A000001 SMITH BARNEY
010 B000001 801-14437
010 C010001 NEW YORK
010 C020001 NY
010 C030001 10013
011 A000001 SMITH BARNEY
011 B000001 8-81777
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10013
012 A000001 FIRST DATA INVESTOR SERVICES GROUP
012 B000001 84-0000000
012 C010001 BOSTON
<PAGE> PAGE 2
012 C020001 MA
012 C030001 02104
013 A000001 KPMG PEAT MARWICK LLP
013 B010001 NEW YORK
013 B020001 NY
013 B030001 10154
015 A000001 PNC BANK
015 B000001 C
015 C010001 PHILADELPHIA
015 C020001 PA
015 C030001 19103
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 127
019 C000000 BARNEY0000
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 MERRILL LYNCH
022 B000001 13-5674085
022 C000001 978072
022 D000001 608832
022 A000002 GOLDMAN SACHS
022 B000002 13-5108880
022 C000002 828842
022 D000002 858183
022 A000003 MORGAN STANLEY
022 B000003 13-2655998
022 C000003 517560
022 D000003 184380
022 A000004 CITICORP SECURITIES
022 B000004 N/A
022 C000004 407476
022 D000004 407063
022 A000005 BEAR STEARNS
022 B000005 13-3299429
022 C000005 361735
022 D000005 120434
022 A000006 LEHMAN BROTHERS
022 B000006 N/A
022 C000006 313358
022 D000006 43905
<PAGE> PAGE 3
022 A000007 BANKERS TRUST SECURITIES
022 B000007 13-3488904
022 C000007 280116
022 D000007 243674
022 A000008 MORGAN GUARANTY
022 B000008 N/A
022 C000008 204771
022 D000008 52200
022 A000009 PRUDENTIAL BACHE
022 B000009 22-2347336
022 C000009 202729
022 D000009 149377
022 A000010 DILLION READ
022 B000010 13-1939216
022 C000010 159082
022 D000010 147187
023 C000000 4253741
023 D000000 2815235
024 000000 N
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
028 A010000 1940191
028 A020000 14528
028 A030000 0
028 A040000 2309124
028 B010000 1946032
028 B020000 12609
028 B030000 0
028 B040000 1911742
028 C010000 1837969
028 C020000 14706
028 C030000 0
028 C040000 1776800
028 D010000 2194362
028 D020000 10453
028 D030000 0
028 D040000 2078174
028 E010000 1591536
028 E020000 11735
028 E030000 0
028 E040000 1639643
028 F010000 1500453
028 F020000 14675
<PAGE> PAGE 4
028 F030000 0
028 F040000 1665948
028 G010000 11010543
028 G020000 78706
028 G030000 0
028 G040000 11381431
028 H000000 0
029 000000 N
030 A000000 0
030 B000000 0.00
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 0
034 000000 N
035 000000 0
036 B000000 0
037 000000 N
038 000000 0
039 000000 N
040 000000 Y
041 000000 Y
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 0
042 E000000 50
042 F000000 0
042 G000000 0
042 H000000 50
043 000000 2642
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.000
048 A010000 2500000
048 A020000 0.500
048 B010000 2500000
048 B020000 0.475
048 C010000 5000000
048 C020000 0.450
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
<PAGE> PAGE 5
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
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 100.0
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 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 50
063 B000000 0.0
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 N
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 N
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N
070 H020000 N
<PAGE> PAGE 6
070 I010000 N
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
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 N
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 0
071 B000000 0
071 C000000 0
071 D000000 0
072 A000000 6
072 B000000 95726
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 12898
072 G000000 0
072 H000000 0
072 I000000 582
072 J000000 155
072 K000000 0
072 L000000 0
072 M000000 15
072 N000000 1281
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 20
072 S000000 8
072 T000000 2642
072 U000000 0
072 V000000 235
072 W000000 25
072 X000000 17861
072 Y000000 0
072 Z000000 77865
072AA000000 0
<PAGE> PAGE 7
072BB000000 90
072CC010000 0
072CC020000 0
072DD010000 77865
072DD020000 0
072EE000000 0
073 A010000 0.0150
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 0
074 B000000 0
074 C000000 5267472
074 D000000 0
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 29348
074 M000000 377
074 N000000 5297197
074 O000000 167002
074 P000000 2630
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 6484
074 S000000 0
074 T000000 5121081
074 U010000 5122105
074 U020000 0
074 V010000 0.00
074 V020000 0.00
074 W000000 0.9998
074 X000000 132114
074 Y000000 0
075 A000000 5312809
075 B000000 0
076 000000 0.00
077 A000000 N
SIGNATURE IRVING P. DAVID
TITLE CONTROLLER
[ARTICLE] 6
[CIK] 0000320282
[NAME] SMITH BARNEY MUNICIPAL MONEY MARKET FUND, INC. CLASS A
<TABLE>
<S> <C>
[PERIOD-TYPE] 6-MOS
[FISCAL-YEAR-END] MAR-31-1996
[PERIOD-END] SEP-30-1996
[INVESTMENTS-AT-COST] 5,267,471,554
[INVESTMENTS-AT-VALUE] 5,267,471,554
[RECEIVABLES] 29,348,209
[ASSETS-OTHER] 376,826
[OTHER-ITEMS-ASSETS] 0
[TOTAL-ASSETS] 5,297,196,589
[PAYABLE-FOR-SECURITIES] 167,001,731
[SENIOR-LONG-TERM-DEBT] 0
[OTHER-ITEMS-LIABILITIES] 9,113,551
[TOTAL-LIABILITIES] 176,115,282
[SENIOR-EQUITY] 0
[PAID-IN-CAPITAL-COMMON] 0
[SHARES-COMMON-STOCK] 5,116,740,363
[SHARES-COMMON-PRIOR] 4,914,872,899
[ACCUMULATED-NII-CURRENT] 0
[OVERDISTRIBUTION-NII] 0
[ACCUMULATED-NET-GAINS] 0
[OVERDISTRIBUTION-GAINS] 0
[ACCUM-APPREC-OR-DEPREC] 0
[NET-ASSETS] 5,121,081,307
[DIVIDEND-INCOME] 0
[INTEREST-INCOME] 0
[OTHER-INCOME] 0
[EXPENSES-NET] 17,861,200
[NET-INVESTMENT-INCOME] 77,864,877
[REALIZED-GAINS-CURRENT] 0
[APPREC-INCREASE-CURRENT] 0
[NET-CHANGE-FROM-OPS] 77,774,649
[EQUALIZATION] 0
[DISTRIBUTIONS-OF-INCOME] 77,399,667
[DISTRIBUTIONS-OF-GAINS] 0
[DISTRIBUTIONS-OTHER] 0
[NUMBER-OF-SHARES-SOLD] 10,952,301,046
[NUMBER-OF-SHARES-REDEEMED] 11,310,215,895
[SHARES-REINVESTED] 78,221,117
[NET-CHANGE-IN-ASSETS] (292,272,322)
[ACCUMULATED-NII-PRIOR] 0
[ACCUMULATED-GAINS-PRIOR] 0
[OVERDISTRIB-NII-PRIOR] 0
[OVERDIST-NET-GAINS-PRIOR] 0
[GROSS-ADVISORY-FEES] 12,898,294
[INTEREST-EXPENSE] 0
[GROSS-EXPENSE] 17,861,200
[AVERAGE-NET-ASSETS] 5,281,780,885
[PER-SHARE-NAV-BEGIN] 1.00
[PER-SHARE-NII] 0.015
[PER-SHARE-GAIN-APPREC] 0
[PER-SHARE-DIVIDEND] 0.015
[PER-SHARE-DISTRIBUTIONS] 0
[RETURNS-OF-CAPITAL] 0
[PER-SHARE-NAV-END] 1.00
[EXPENSE-RATIO] 0.67
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
[ARTICLE] 6
[CIK] 0000320282
[NAME] SMITH BARNEY MUNICIPAL MONEY MARKET FUND, INC. CLASS C
<TABLE>
<S> <C>
[PERIOD-TYPE] 6-MOS
[FISCAL-YEAR-END] MAR-31-1996
[PERIOD-END] SEP-30-1996
[INVESTMENTS-AT-COST] 5,267,471,554
[INVESTMENTS-AT-VALUE] 5,267,471,554
[RECEIVABLES] 29,348,209
[ASSETS-OTHER] 376,826
[OTHER-ITEMS-ASSETS] 0
[TOTAL-ASSETS] 5,297,196,589
[PAYABLE-FOR-SECURITIES] 167,001,731
[SENIOR-LONG-TERM-DEBT] 0
[OTHER-ITEMS-LIABILITIES] 9,113,551
[TOTAL-LIABILITIES] 176,115,282
[SENIOR-EQUITY] 0
[PAID-IN-CAPITAL-COMMON] 0
[SHARES-COMMON-STOCK] 216,238
[SHARES-COMMON-PRIOR] 59,379
[ACCUMULATED-NII-CURRENT] 0
[OVERDISTRIBUTION-NII] 0
[ACCUMULATED-NET-GAINS] 0
[OVERDISTRIBUTION-GAINS] 0
[ACCUM-APPREC-OR-DEPREC] 0
[NET-ASSETS] 5,121,081,307
[DIVIDEND-INCOME] 0
[INTEREST-INCOME] 0
[OTHER-INCOME] 0
[EXPENSES-NET] 17,861,200
[NET-INVESTMENT-INCOME] 77,864,877
[REALIZED-GAINS-CURRENT] 0
[APPREC-INCREASE-CURRENT] 0
[NET-CHANGE-FROM-OPS] 77,774,649
[EQUALIZATION] 0
[DISTRIBUTIONS-OF-INCOME] 1,978
[DISTRIBUTIONS-OF-GAINS] 0
[DISTRIBUTIONS-OTHER] 0
[NUMBER-OF-SHARES-SOLD] 199,991
[NUMBER-OF-SHARES-REDEEMED] 29,342
[SHARES-REINVESTED] 1,732
[NET-CHANGE-IN-ASSETS] (292,272,322)
[ACCUMULATED-NII-PRIOR] 0
[ACCUMULATED-GAINS-PRIOR] 0
[OVERDISTRIB-NII-PRIOR] 0
[OVERDIST-NET-GAINS-PRIOR] 0
[GROSS-ADVISORY-FEES] 12,898,294
[INTEREST-EXPENSE] 0
[GROSS-EXPENSE] 17,861,200
[AVERAGE-NET-ASSETS] 137,939
[PER-SHARE-NAV-BEGIN] 1.00
[PER-SHARE-NII] 0.015
[PER-SHARE-GAIN-APPREC] 0
[PER-SHARE-DIVIDEND] 0.015
[PER-SHARE-DISTRIBUTIONS] 0
[RETURNS-OF-CAPITAL] 0
[PER-SHARE-NAV-END] 1.00
[EXPENSE-RATIO] 0.67
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
[ARTICLE] 6
[CIK] 0000320282
[NAME] SMITH BARNEY MUNICIPAL MONEY MARKET FUND, INC. CLASS Y
<TABLE>
<S> <C>
[PERIOD-TYPE] 6-MOS
[FISCAL-YEAR-END] MAR-31-1996
[PERIOD-END] SEP-30-1996
[INVESTMENTS-AT-COST] 5,267,471,554
[INVESTMENTS-AT-VALUE] 5,267,471,554
[RECEIVABLES] 29,348,209
[ASSETS-OTHER] 376,826
[OTHER-ITEMS-ASSETS] 0
[TOTAL-ASSETS] 5,297,196,589
[PAYABLE-FOR-SECURITIES] 167,001,731
[SENIOR-LONG-TERM-DEBT] 0
[OTHER-ITEMS-LIABILITIES] 9,113,551
[TOTAL-LIABILITIES] 176,115,282
[SENIOR-EQUITY] 0
[PAID-IN-CAPITAL-COMMON] 0
[SHARES-COMMON-STOCK] 5,148,363
[SHARES-COMMON-PRIOR] 0
[ACCUMULATED-NII-CURRENT] 0
[OVERDISTRIBUTION-NII] 0
[ACCUMULATED-NET-GAINS] 0
[OVERDISTRIBUTION-GAINS] 0
[ACCUM-APPREC-OR-DEPREC] 0
[NET-ASSETS] 5,121,081,307
[DIVIDEND-INCOME] 0
[INTEREST-INCOME] 0
[OTHER-INCOME] 0
[EXPENSES-NET] 17,861,200
[NET-INVESTMENT-INCOME] 77,864,877
[REALIZED-GAINS-CURRENT] 0
[APPREC-INCREASE-CURRENT] 0
[NET-CHANGE-FROM-OPS] 77,774,649
[EQUALIZATION] 0
[DISTRIBUTIONS-OF-INCOME] 463,232
[DISTRIBUTIONS-OF-GAINS] 0
[DISTRIBUTIONS-OTHER] 0
[NUMBER-OF-SHARES-SOLD] 58,042,301
[NUMBER-OF-SHARES-REDEEMED] 71,185,188
[SHARES-REINVESTED] 482,144
[NET-CHANGE-IN-ASSETS] (292,272,322)
[ACCUMULATED-NII-PRIOR] 0
[ACCUMULATED-GAINS-PRIOR] 0
[OVERDISTRIB-NII-PRIOR] 0
[OVERDIST-NET-GAINS-PRIOR] 0
[GROSS-ADVISORY-FEES] 12,898,294
[INTEREST-EXPENSE] 0
[GROSS-EXPENSE] 17,861,200
[AVERAGE-NET-ASSETS] 30,890,595
[PER-SHARE-NAV-BEGIN] 1.00
[PER-SHARE-NII] 0.015
[PER-SHARE-GAIN-APPREC] 0
[PER-SHARE-DIVIDEND] 0.015
[PER-SHARE-DISTRIBUTIONS] 0
[RETURNS-OF-CAPITAL] 0
[PER-SHARE-NAV-END] 1.00
[EXPENSE-RATIO] 0.57
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>