-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0000950135-07-005365.txt : 20070829
<SEC-HEADER>0000950135-07-005365.hdr.sgml : 20070829
<ACCEPTANCE-DATETIME>20070829160429
ACCESSION NUMBER:		0000950135-07-005365
CONFORMED SUBMISSION TYPE:	N-PX
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070630
FILED AS OF DATE:		20070829
DATE AS OF CHANGE:		20070829
EFFECTIVENESS DATE:		20070829

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-PX
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-04992
		FILM NUMBER:		071087714

	BUSINESS ADDRESS:	
		STREET 1:		500 BOYLSTON ST
		STREET 2:		20TH FL LEGAL DEPT.
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		6179545000

	MAIL ADDRESS:	
		STREET 1:		500 BOYLSTON ST
		STREET 2:		20TH FL LEGAL DEPT
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COLONIAL MUNICIPAL INCOME TRUST
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-PX
<SEQUENCE>1
<FILENAME>b66538a1nvpx.txt
<DESCRIPTION>MFS HIGH YIELD MUNICIPAL TRUST
<TEXT>
<PAGE>

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-PX

                     ANNUAL REPORT OF PROXY VOTING RECORD OF
                   REGISTERED MANAGEMENT INVESTMENT COMPANIES

                   Investment Company Act file number 811-4492

                         MFS HIGH YIELD MUNICIPAL TRUST
               (Exact name of registrant as specified in charter)

                500 Boylston Street, Boston, Massachusetts 02116
               (Address of principal executive offices) (Zip code)

                                 Susan S. Newton
                    Massachusetts Financial Services Company
                               500 Boylston Street
                           Boston, Massachusetts 02116
                    (Name and address of agents for service)

       Registrant's telephone number, including area code: (617) 954-5000

                      Date of fiscal year end: November 30

             Date of reporting period: July 1, 2006 - June 30, 2007

<PAGE>

ITEM 1. PROXY VOTING RECORD.

<PAGE>
******************************* FORM N-Px REPORT *******************************

ICA File Number: 811-04992
Reporting Period: 07/01/2006 - 06/30/2007
MFS High Yield Municipal Trust

======================= MFS HIGH YIELD MUNICIPAL TRUST========================

NO VOTING RECORDS FOR THIS REPORTING PERIOD

========== END NPX REPORT
<PAGE>

                                   SIGNATURES

Pursuant to the requirements of the Investment Company Act of 1940, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

Registrant: MFS HIGH YIELD MUNICIPAL TRUST


By (Signature and Title)  MARIA F. DWYER*
                          -------------------------------------------
                          Maria F. Dwyer, Principal Executive Officer

Date: August 29, 2007


*By (Signature and Title) /s/ Susan S. Newton
                          -------------------------------------------
                          Susan S. Newton, as attorney-in-fact

*    Executed by Susan S. Newton on behalf of Maria F. Dwyer pursuant to a Power
     of Attorney dated July 18, 2007. (1)

(1)  Incorporated by reference to MFS Series Trust XV (File Nos. 2-96738 and
     811-4253) Post-Effective Amendment No. 28 filed with the SEC via EDGAR on
     August 24, 2007 and to MFS Series Trust XIV (File No. 811-22033)
     Post-Effective Amendment No. 1 to be filed with the SEC via EDGAR on or
     about August 30, 2007.

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
