<SEC-DOCUMENT>0001193125-19-274492-index.html : 20191025
<SEC-HEADER>0001193125-19-274492.hdr.sgml : 20191025
<ACCEPTANCE-DATETIME>20191025123736
ACCESSION NUMBER:		0001193125-19-274492
CONFORMED SUBMISSION TYPE:	485BPOS
PUBLIC DOCUMENT COUNT:		21
FILED AS OF DATE:		20191025
DATE AS OF CHANGE:		20191025
EFFECTIVENESS DATE:		20191028

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:		485BPOS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	002-57354
		FILM NUMBER:		191168843

	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

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:		485BPOS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-02688
		FILM NUMBER:		191168842

	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>C000006120
<CLASS-CONTRACT-NAME>Investor C1
</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>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000100249
<CLASS-CONTRACT-NAME>Service Shares
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000100250
<CLASS-CONTRACT-NAME>Class K
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000225635
<SERIES-ID>S000002335
<SERIES-NAME>BlackRock Short-Term Municipal Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000006122
<CLASS-CONTRACT-NAME>Investor A1
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000006124
<CLASS-CONTRACT-NAME>Investor C
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000006125
<CLASS-CONTRACT-NAME>Institutional
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000038034
<CLASS-CONTRACT-NAME>Investor A
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000038035
<CLASS-CONTRACT-NAME>Class K Shares
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000225635
<SERIES-ID>S000011867
<SERIES-NAME>BlackRock High Yield Municipal Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000032425
<CLASS-CONTRACT-NAME>Investor A
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000032427
<CLASS-CONTRACT-NAME>Investor C
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000032428
<CLASS-CONTRACT-NAME>Institutional
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000199786
<CLASS-CONTRACT-NAME>Class K
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>485BPOS
<SEQUENCE>1
<FILENAME>d815584d485bpos.htm
<DESCRIPTION>BLACKROCK MUNICIPAL BOND FUND, INC.
<TEXT>
Document 1 - file: d815584d485bpos.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.(1)(AA) <SEQUENCE>2 <FILENAME>d815584dex991aa.htm <DESCRIPTION>ARTICLES SUPPLEMENTARY RECLASSIFYING SHARES OF COMMON STOCK <TEXT> Document 2 - file: d815584dex991aa.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.(1)(BB) <SEQUENCE>3 <FILENAME>d815584dex991bb.htm <DESCRIPTION>ARTICLES SUPPLEMENTARY TO ARTICLES OF INCORPORATION <TEXT> Document 3 - file: d815584dex991bb.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.10 <SEQUENCE>4 <FILENAME>d815584dex9910.htm <DESCRIPTION>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM. <TEXT> Document 4 - file: d815584dex9910.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>6 <FILENAME>g809292bar_1.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 6 - file: g809292bar_1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>7 <FILENAME>g809292imgd428edbe1.gif <DESCRIPTION>GRAPHIC <TEXT> Document 7 - file: g809292imgd428edbe1.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>8 <FILENAME>g809292imge4c493162.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 8 - file: g809292imge4c493162.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>9 <FILENAME>g811101bar_1.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 9 - file: g811101bar_1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>10 <FILENAME>g811101img4420377c3.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 10 - file: g811101img4420377c3.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>11 <FILENAME>g811101imgad2cae8c2.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 11 - file: g811101imgad2cae8c2.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>12 <FILENAME>g811101imgb0cc342d1.gif <DESCRIPTION>GRAPHIC <TEXT> Document 12 - file: g811101imgb0cc342d1.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>13 <FILENAME>g815584bar_1.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 13 - file: g815584bar_1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>14 <FILENAME>g815584img40e681dc1.gif <DESCRIPTION>GRAPHIC <TEXT> Document 14 - file: g815584img40e681dc1.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>15 <FILENAME>g815584img563e908e2.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 15 - file: g815584img563e908e2.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>16 <FILENAME>g815584imga14b73f34.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 16 - file: g815584imga14b73f34.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>17 <FILENAME>g815584imgb31753783.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 17 - file: g815584imgb31753783.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>18 <FILENAME>g816838bar_1.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 18 - file: g816838bar_1.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>19 <FILENAME>g816838img1b129ee71.gif <DESCRIPTION>GRAPHIC <TEXT> Document 19 - file: g816838img1b129ee71.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>20 <FILENAME>g816838img4133483a3.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 20 - file: g816838img4133483a3.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>21 <FILENAME>g816838img7443bcf32.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 21 - file: g816838img7443bcf32.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>22 <FILENAME>g816838imgbbb2a8c34.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 22 - file: g816838imgbbb2a8c34.jpg
</DOCUMENT> </SEC-DOCUMENT>