<SEC-DOCUMENT>0001193125-17-219432-index.html : 20170630 <SEC-HEADER>0001193125-17-219432.hdr.sgml : 20170630 <ACCEPTANCE-DATETIME>20170630114743 ACCESSION NUMBER: 0001193125-17-219432 CONFORMED SUBMISSION TYPE: 497 PUBLIC DOCUMENT COUNT: 17 FILED AS OF DATE: 20170630 DATE AS OF CHANGE: 20170630 EFFECTIVENESS DATE: 20170630 FILER: COMPANY DATA: COMPANY CONFORMED NAME: BLACKROCK MUNICIPAL BOND FUND, INC. CENTRAL INDEX KEY: 0000225635 IRS NUMBER: 132896246 STATE OF INCORPORATION: NJ FISCAL YEAR END: 0630 FILING VALUES: FORM TYPE: 497 SEC ACT: 1933 Act SEC FILE NUMBER: 002-57354 FILM NUMBER: 17941002 BUSINESS ADDRESS: STREET 1: 100 BELLEVUE PARKWAY CITY: WILMINGTON STATE: DE ZIP: 19809 BUSINESS PHONE: 800-441-7762 MAIL ADDRESS: STREET 1: 100 BELLEVUE PARKWAY CITY: WILMINGTON STATE: DE ZIP: 19809 FORMER COMPANY: FORMER CONFORMED NAME: MERRILL LYNCH MUNICIPAL BOND FUND INC DATE OF NAME CHANGE: 19920703 FORMER COMPANY: FORMER CONFORMED NAME: ONE LIBERTY MUNICIPAL BOND FUND INC DATE OF NAME CHANGE: 19780622 <SERIES-AND-CLASSES-CONTRACTS-DATA> <EXISTING-SERIES-AND-CLASSES-CONTRACTS> <SERIES> <OWNER-CIK>0000225635 <SERIES-ID>S000002334 <SERIES-NAME>BlackRock National Municipal Fund <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000006118 <CLASS-CONTRACT-NAME>Investor A </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000006119 <CLASS-CONTRACT-NAME>Investor B </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000006121 <CLASS-CONTRACT-NAME>Institutional </CLASS-CONTRACT> <CLASS-CONTRACT> <CLASS-CONTRACT-ID>C000038033 <CLASS-CONTRACT-NAME>Investor C </CLASS-CONTRACT> </SERIES> </EXISTING-SERIES-AND-CLASSES-CONTRACTS> </SERIES-AND-CLASSES-CONTRACTS-DATA> </SEC-HEADER> <DOCUMENT> <TYPE>497 <SEQUENCE>1 <FILENAME>d411698d497.htm <DESCRIPTION>BLACKROCK NATIONAL MUNICIPAL FUND - INVESTOR AND INSTITUTIONAL SHARES <TEXT> Document 1 - file: d411698d497.htm
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