<SEC-DOCUMENT>0001193125-22-013627-index.html : 20220120
<SEC-HEADER>0001193125-22-013627.hdr.sgml : 20220120
<ACCEPTANCE-DATETIME>20220120142404
ACCESSION NUMBER:		0001193125-22-013627
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		19
CONFORMED PERIOD OF REPORT:	20211130
FILED AS OF DATE:		20220120
DATE AS OF CHANGE:		20220120
EFFECTIVENESS DATE:		20220120

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:		22541915

	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>d271982dncsr.htm
<DESCRIPTION>MFS HIGH YIELD MUNICIPAL TRUST N-CSR
<TEXT>
Document 1 - file: d271982dncsr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CODE ETH
<SEQUENCE>2
<FILENAME>d271982dex99codeeth.htm
<DESCRIPTION>CODE OF ETHICS
<TEXT>
Document 2 - file: d271982dex99codeeth.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>3
<FILENAME>d271982dex99cert.htm
<DESCRIPTION>SECTION 302 CERTIFICATIONS
<TEXT>
Document 3 - file: d271982dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>4
<FILENAME>d271982dex99906cert.htm
<DESCRIPTION>SECTION 906 CERTIFICATIONS
<TEXT>
Document 4 - file: d271982dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.30E-3 NOTICE
<SEQUENCE>5
<FILENAME>d271982dex9930e3notice.htm
<DESCRIPTION>30E-3 NOTICE
<TEXT>
Document 5 - file: d271982dex9930e3notice.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.PROXYPOL
<SEQUENCE>6
<FILENAME>d271982dex99proxypol.htm
<DESCRIPTION>MFS PROXY VOTING POLICIES AND PROCEDURES
<TEXT>
Document 6 - file: d271982dex99proxypol.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g271982dsp013.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g271982dsp013.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g271982dsp025a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g271982dsp025a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g271982dsp025b.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g271982dsp025b.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g271982dsp026a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g271982dsp026a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g271982img0f2170eb9.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: g271982img0f2170eb9.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>g271982img162014a73.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g271982img162014a73.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g271982img18d613c01.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: g271982img18d613c01.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>g271982img22253e312.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: g271982img22253e312.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>g271982img6d8d6ebe8.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: g271982img6d8d6ebe8.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>g271982img91ac038c5.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 16 - file: g271982img91ac038c5.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>g271982imgbbadaa244.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 17 - file: g271982imgbbadaa244.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>g271982imgc836849d6.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 18 - file: g271982imgc836849d6.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>g271982imgcb9845c27.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 19 - file: g271982imgcb9845c27.jpg

</DOCUMENT>
</SEC-DOCUMENT>