<SEC-DOCUMENT>0001683863-25-006220-index.html : 20250728
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<ACCEPTANCE-DATETIME>20250728085902
ACCESSION NUMBER:		0001683863-25-006220
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		11
CONFORMED PERIOD OF REPORT:	20250531
FILED AS OF DATE:		20250728
DATE AS OF CHANGE:		20250728
EFFECTIVENESS DATE:		20250728

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MFS HIGH YIELD MUNICIPAL TRUST
		CENTRAL INDEX KEY:			0000809844
		ORGANIZATION NAME:           	
		EIN:				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:		251153110

	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>
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<DESCRIPTION>MFS HIGH YIELD MUNICIPAL TRUST (CMU) NCSRS
<TEXT>
Document 1 - file: f42554d1.htm

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<TEXT>
Document 2 - file: f42554d2.htm

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<TYPE>EX-99.906 CERT
<SEQUENCE>3
<FILENAME>f42554d3.htm
<DESCRIPTION>EX-99.906 CERT
<TEXT>
Document 3 - file: f42554d3.htm

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<DESCRIPTION>EX-99.30E-3
<TEXT>
Document 4 - file: f42554d4.htm

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Document 5 - file: img5dac8dc93.jpg

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Document 6 - file: imga675ba682.gif

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<TEXT>
Document 7 - file: imgb61032a41.gif

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Document 8 - file: imgdcbd67974.gif

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Document 9 - file: gb-notice_imagesgbnotice5xg.jpg

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Document 10 - file: gg-30e3_imagesgg30e32x1.jpg

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Document 11 - file: gg-30e3_imagesgg30e33x1.jpg

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