MERRILL LYNCH MUNICIPAL BOND FUND INC
NSAR-B, 1999-08-25
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<PAGE>      PAGE  1
000 B000000 06/30/99
000 C000000 0000225635
000 D000000 N
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000 J000000 A
001 A000000 MERRILL LYNCH MUNICIPAL BOND FUND, INC.
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002 A000000 P.O. BOX 9011
002 B000000 PRINCETON
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008 D02AA01 NJ
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008 D04AA01 9011
011 A00AA01 MERRILL LYNCH FUNDS DISTRIBUTOR, INC.
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012 A00AA01 FINANCIAL DATA SERVICES, INC.
012 B00AA01 84-01339
012 C01AA01 JACKSONVILLE
012 C02AA01 FL
012 C03AA01 32246
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013 A00AA01 DELOITTE & TOUCHE LLP
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013 B02AA01 NJ
013 B03AA01 08540
014 A00AA01 MLPF&S AND OTHER ML BROKER/DEALER AFFILIATES
014 B00AA01 8-7221
015 A00AA01 THE BANK OF NEW YORK
015 B00AA01 C
015 C01AA01 NEW YORK
015 C02AA01 NY
015 C03AA01 10286
015 E01AA01 X
015 A00AA02 BANKERS TRUST COMPANY
015 B00AA02 S
015 C01AA02 NEW YORK
015 C02AA02 NY
015 C03AA02 10006
015 E01AA02 X
015 A00AA03 THE CHASE MANHATTAN BANK
015 B00AA03 S
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015 C02AA03 NY
015 C03AA03 10017
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015 A00AA04 CUSTODIAL TRUST CO.
015 B00AA04 S
015 C01AA04 NEW YORK
015 C02AA04 NY
015 C03AA04 10167
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015 A00AA05 MORGAN GUARANTY TRUST CO. OF NEW YORK
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015 C01AA05 NEW YORK
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020 A000002 SALOMON SMITH BARNEY INC.
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<PAGE>      PAGE  10
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<PAGE>      PAGE  11
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SIGNATURE   DONALD C. BURKE
TITLE       TREASURER


WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
<SERIES>
   <NUMBER> 021
   <NAME> INSURED PORTFOLIO

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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
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   <NAME> INSURED PORTFOLIO

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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

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<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

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<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

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<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
<SERIES>
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   <NAME> NATIONAL PORTFOLIO

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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

\<ARTICLE> 6
<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
<SERIES>
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   <NAME> NATIONAL PORTFOLIO

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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
<SERIES>
   <NUMBER> 013
   <NAME> NATIONAL PORTFOLIO

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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000225635
<NAME> MERRILL LYNCH MUNICIPAL BOND FUND, INC.
<SERIES>
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   <NAME> NATIONAL PORTFOLIO

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