<SEC-DOCUMENT>0001193125-20-157309-index.html : 20200601
<SEC-HEADER>0001193125-20-157309.hdr.sgml : 20200601
<ACCEPTANCE-DATETIME>20200601163208
ACCESSION NUMBER:		0001193125-20-157309
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20200601
DATE AS OF CHANGE:		20200601
EFFECTIVENESS DATE:		20200601

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK MUNIASSETS FUND, INC.
		CENTRAL INDEX KEY:			0000901243
		IRS NUMBER:				223239638
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-236891
		FILM NUMBER:		20933780

	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:	MUNIASSETS FUND INC
		DATE OF NAME CHANGE:	19930714

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MUNIINCOME FUND INC
		DATE OF NAME CHANGE:	19930517
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>d872457d497.htm
<DESCRIPTION>BLACKROCK MUNIASSETS FUND
<TEXT>
Document 1 - file: d872457d497.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g872457g06t81.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g872457g06t81.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g872457g53q71.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g872457g53q71.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g872457g64k79.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g872457g64k79.jpg

</DOCUMENT>
</SEC-DOCUMENT>