<SEC-DOCUMENT>0001193125-22-209871-index.html : 20220802
<SEC-HEADER>0001193125-22-209871.hdr.sgml : 20220802
<ACCEPTANCE-DATETIME>20220802135342
ACCESSION NUMBER:		0001193125-22-209871
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20220531
FILED AS OF DATE:		20220802
DATE AS OF CHANGE:		20220802
EFFECTIVENESS DATE:		20220802

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:		N-CSR
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-02688
		FILM NUMBER:		221127990

	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>N-CSR
<SEQUENCE>1
<FILENAME>d264156dncsr.htm
<DESCRIPTION>BLACKROCK MUNICIPAL BOND FUND, INC.
<TEXT>
Document 1 - file: d264156dncsr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d264156dex99cert.htm
<DESCRIPTION>CERTIFICATIONS PURSUANT TO SECTION 302
<TEXT>
Document 2 - file: d264156dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906 CERT
<SEQUENCE>3
<FILENAME>d264156dex99906cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906
<TEXT>
Document 3 - file: d264156dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g300129g04z13.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g300129g04z13.jpg

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<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g300129g13h09.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g300129g13h09.jpg

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<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g300129g25u71.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g300129g25u71.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g300129g34q13.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g300129g34q13.jpg

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<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g300129g42l24.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g300129g42l24.jpg

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<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g300129g50y74.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g300129g50y74.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g300129g58x21.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g300129g58x21.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g300129sp011.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: g300129sp011.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>g300129sp015.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g300129sp015.jpg

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<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g300129sp129.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: g300129sp129.jpg

</DOCUMENT>
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