<SEC-DOCUMENT>0001193125-20-017939-index.html : 20200129
<SEC-HEADER>0001193125-20-017939.hdr.sgml : 20200129
<ACCEPTANCE-DATETIME>20200129120306
ACCESSION NUMBER:		0001193125-20-017939
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20191130
FILED AS OF DATE:		20200129
DATE AS OF CHANGE:		20200129
EFFECTIVENESS DATE:		20200129

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-CSR
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-04992
		FILM NUMBER:		20557145

	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-CSR
<SEQUENCE>1
<FILENAME>d811340dncsr.htm
<DESCRIPTION>MFS HIGH YIELD MUNICIPAL TRUST N-CSR
<TEXT>
Document 1 - file: d811340dncsr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.(12)(A)(1)
<SEQUENCE>2
<FILENAME>d811340dex9912a1.htm
<DESCRIPTION>CODE OF ETHICS
<TEXT>
Document 2 - file: d811340dex9912a1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>3
<FILENAME>d811340dex99cert.htm
<DESCRIPTION>SECTION 302 CERTIFICATIONS
<TEXT>
Document 3 - file: d811340dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>4
<FILENAME>d811340dex99906cert.htm
<DESCRIPTION>SECTION 906 CERTIFICATIONS
<TEXT>
Document 4 - file: d811340dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.PROXYPOL
<SEQUENCE>5
<FILENAME>d811340dex99proxypol.htm
<DESCRIPTION>MFS PROXY VOTING POLICIES AND PROCEDURES
<TEXT>
Document 5 - file: d811340dex99proxypol.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g811340ernst_youngllp.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g811340ernst_youngllp.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g811340g0117005311476.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g811340g0117005311476.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g811340g17m13.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g811340g17m13.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g811340g67p04.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g811340g67p04.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g811340g72s28.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g811340g72s28.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g811340g82k67.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: g811340g82k67.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>g811340manning_photo.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g811340manning_photo.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g811340manning_sig.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: g811340manning_sig.jpg

</DOCUMENT>
</SEC-DOCUMENT>