<SEC-DOCUMENT>0001193125-20-196959-index.html : 20200722
<SEC-HEADER>0001193125-20-196959.hdr.sgml : 20200722
<ACCEPTANCE-DATETIME>20200722123002
ACCESSION NUMBER:		0001193125-20-196959
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		9
CONFORMED PERIOD OF REPORT:	20200531
FILED AS OF DATE:		20200722
DATE AS OF CHANGE:		20200722
EFFECTIVENESS DATE:		20200722

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MFS HIGH YIELD MUNICIPAL TRUST
		CENTRAL INDEX KEY:			0000809844
		IRS NUMBER:				042950868
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1130

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-04992
		FILM NUMBER:		201040944

	BUSINESS ADDRESS:	
		STREET 1:		111 HUNTINGTON AVENUE
		STREET 2:		24TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199
		BUSINESS PHONE:		617-954-5000

	MAIL ADDRESS:	
		STREET 1:		111 HUNTINGTON AVENUE
		STREET 2:		24TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COLONIAL MUNICIPAL INCOME TRUST
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>d833449dncsrs.htm
<DESCRIPTION>MFS HIGH YIELD MUNICIPAL TRUST N-CSRS
<TEXT>
Document 1 - file: d833449dncsrs.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d833449dex99cert.htm
<DESCRIPTION>SECTION 302 CERTIFICATIONS
<TEXT>
Document 2 - file: d833449dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>3
<FILENAME>d833449dex99906cert.htm
<DESCRIPTION>SECTION 906 CERTIFICATIONS
<TEXT>
Document 3 - file: d833449dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g833449ernst_youngllp.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g833449ernst_youngllp.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g833449g17m13.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g833449g17m13.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g833449g72s28.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g833449g72s28.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g833449g83t20.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g833449g83t20.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g833449manning_photo.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g833449manning_photo.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g833449manning_sig.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g833449manning_sig.jpg

</DOCUMENT>
</SEC-DOCUMENT>