<SEC-DOCUMENT>0001193125-22-199818-index.html : 20220722
<SEC-HEADER>0001193125-22-199818.hdr.sgml : 20220722
<ACCEPTANCE-DATETIME>20220722121303
ACCESSION NUMBER:		0001193125-22-199818
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		16
CONFORMED PERIOD OF REPORT:	20220531
FILED AS OF DATE:		20220722
DATE AS OF CHANGE:		20220722
EFFECTIVENESS DATE:		20220722

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:		221099219

	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>d286408dncsrs.htm
<DESCRIPTION>MFS HIGH YIELD MUNICIPAL TRUST N-CSRS
<TEXT>
Document 1 - file: d286408dncsrs.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d286408dex99cert.htm
<DESCRIPTION>SECTION 302 CERTIFICATIONS
<TEXT>
Document 2 - file: d286408dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>3
<FILENAME>d286408dex99906cert.htm
<DESCRIPTION>SECTION 906 CERTIFICATIONS
<TEXT>
Document 3 - file: d286408dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.30E3 NOTICE
<SEQUENCE>4
<FILENAME>d286408dex9930e3notice.htm
<DESCRIPTION>30E3 NOTICE
<TEXT>
Document 4 - file: d286408dex9930e3notice.htm

</DOCUMENT>
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<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g286408dsp018.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g286408dsp018.jpg

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<TYPE>GRAPHIC
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<FILENAME>g286408dsp019a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g286408dsp019a.jpg

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<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g286408dsp019b.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g286408dsp019b.jpg

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<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g286408dsp019c.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g286408dsp019c.jpg

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Document 9 - file: g286408g55f64.jpg

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<SEQUENCE>10
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<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g286408img09e65d191.gif

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<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: g286408img2614f4383.jpg

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<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g286408img2bdc43cd7.gif

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<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g286408img376bb0d85.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: g286408img376bb0d85.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>g286408img5c85b5e44.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: g286408img5c85b5e44.gif

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>g286408img9ca9d2142.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: g286408img9ca9d2142.gif

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<TYPE>GRAPHIC
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<TEXT>
Document 16 - file: g286408imgb4856f3c6.jpg

</DOCUMENT>
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