0001193125-23-245384.txt : 20230928 0001193125-23-245384.hdr.sgml : 20230928 20230928131956 ACCESSION NUMBER: 0001193125-23-245384 CONFORMED SUBMISSION TYPE: 497J PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20230928 DATE AS OF CHANGE: 20230928 EFFECTIVENESS DATE: 20230928 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: 497J SEC ACT: 1933 Act SEC FILE NUMBER: 002-57354 FILM NUMBER: 231288345 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 0000225635 S000075512 BlackRock Impact Municipal Fund C000234660 Investor A C000234661 Institutional C000234662 Class K 497J 1 d525501d497j.htm BLACKROCK IMPACT MUNICIPAL FUND BlackRock Impact Municipal Fund

September 28, 2023

VIA ELECTRONIC FILING

Securities and Exchange Commission

100 F Street, NE

Judiciary Plaza

Washington, DC 20549

Attention: Division of Investment Management

RE: BlackRock Municipal Bond Fund, Inc.

Post-Effective Amendment No. 75 to the Registration Statement on Form N-1A

(Securities Act File No. 002-57354, Investment Company Act File No. 811-02688)

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended (the “1933 Act”), BlackRock Municipal Bond Fund, Inc. (the “Fund”) hereby certifies that:

(1) the form of Prospectus and Statement of Additional Information that would have been filed pursuant to Rule 497(c) under the 1933 Act would not have differed from that contained in Post-Effective Amendment No. 75 to the Fund’s Registration Statement on Form N-1A; and

(2) the text of Post-Effective Amendment No. 75 to the Fund’s Registration Statement on Form N-1A was filed electronically with the Securities and Exchange Commission on September 26, 2023.

Sincerely,

BlackRock Municipal Bond Fund, Inc.

/s/ Janey Ahn

Janey Ahn

Secretary of the Fund