<SEC-DOCUMENT>0001683863-24-004656-index.html : 20240722
<SEC-HEADER>0001683863-24-004656.hdr.sgml : 20240722
<ACCEPTANCE-DATETIME>20240722073132
ACCESSION NUMBER:		0001683863-24-004656
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20240531
FILED AS OF DATE:		20240722
DATE AS OF CHANGE:		20240722
EFFECTIVENESS DATE:		20240722

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MFS HIGH YIELD MUNICIPAL TRUST
		CENTRAL INDEX KEY:			0000809844
		ORGANIZATION NAME:           	
		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:		241129262

	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>f39039d1.htm
<DESCRIPTION>MFS HIGH YIELD MUNICIPAL TRUST NCSRS
<TEXT>
Document 1 - file: f39039d1.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.CODE ETH <SEQUENCE>2 <FILENAME>f39039d2.htm <DESCRIPTION>99.COE <TEXT> Document 2 - file: f39039d2.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.302 CERT <SEQUENCE>3 <FILENAME>f39039d3.htm <DESCRIPTION>99.302CERT <TEXT> Document 3 - file: f39039d3.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.906 CERT <SEQUENCE>4 <FILENAME>f39039d4.htm <DESCRIPTION>99.906CERT <TEXT> Document 4 - file: f39039d4.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.30E-3 <SEQUENCE>5 <FILENAME>f39039d5.htm <DESCRIPTION>99.30E-3 <TEXT> Document 5 - file: f39039d5.htm
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>6 <FILENAME>img1a1e3ca14.gif <DESCRIPTION>GRAPHIC <TEXT> Document 6 - file: img1a1e3ca14.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>7 <FILENAME>img6978ea681.gif <DESCRIPTION>GRAPHIC <TEXT> Document 7 - file: img6978ea681.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>8 <FILENAME>imgb9df571c2.gif <DESCRIPTION>GRAPHIC <TEXT> Document 8 - file: imgb9df571c2.gif
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>9 <FILENAME>imgddbc39383.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 9 - file: imgddbc39383.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>10 <FILENAME>gek1gco0zfjel5g4usdyp.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 10 - file: gek1gco0zfjel5g4usdyp.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>11 <FILENAME>gmpejof8q0p7r7we362ys.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 11 - file: gmpejof8q0p7r7we362ys.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>12 <FILENAME>g1qaerxtbfwxwubmyvcpz.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 12 - file: g1qaerxtbfwxwubmyvcpz.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>13 <FILENAME>gk1xuyby7mcgm0sj710nj.jpg <DESCRIPTION>GRAPHIC <TEXT> Document 13 - file: gk1xuyby7mcgm0sj710nj.jpg
</DOCUMENT> </SEC-DOCUMENT>