<SEC-DOCUMENT>0001193125-23-245384-index.html : 20230928
<SEC-HEADER>0001193125-23-245384.hdr.sgml : 20230928
<ACCEPTANCE-DATETIME>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
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000225635
<SERIES-ID>S000075512
<SERIES-NAME>BlackRock Impact Municipal Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000234660
<CLASS-CONTRACT-NAME>Investor A
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000234661
<CLASS-CONTRACT-NAME>Institutional
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000234662
<CLASS-CONTRACT-NAME>Class K
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>497J
<SEQUENCE>1
<FILENAME>d525501d497j.htm
<DESCRIPTION>BLACKROCK IMPACT MUNICIPAL FUND
<TEXT>
Document 1 - file: d525501d497j.htm

</DOCUMENT>
</SEC-DOCUMENT>