    <SEC-DOCUMENT>0001133228-25-010015-index.html : 20250923
    <SEC-HEADER>0001133228-25-010015.hdr.sgml : 20250923
    <ACCEPTANCE-DATETIME>20250923160259
    ACCESSION NUMBER:		0001133228-25-010015
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		5
    FILED AS OF DATE:		20250923
    DATE AS OF CHANGE:		20250923

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Eaton Vance Senior Income Trust
    		CENTRAL INDEX KEY:			0001070732
    		ORGANIZATION NAME:
    		EIN:				043435040

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	811-09013
    		FILM NUMBER:		251333641

    	BUSINESS ADDRESS:
    		STREET 1:		ONE POST OFFICE SQUARE
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02109
    		BUSINESS PHONE:		617-482-8260

    	MAIL ADDRESS:
    		STREET 1:		ONE POST OFFICE SQUARE
    		CITY:			BOSTON
    		STATE:			MA
    		ZIP:			02109

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	EATON VANCE SENIOR INCOME TRUST
    		DATE OF NAME CHANGE:	19980919
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>evsit-efp17821_defa14a.htm
    <DESCRIPTION>EATON VANCE SENIOR INCOME TRUST - DEFA 14A
    <TEXT>
    Document 1 - file: evsit-efp17821_defa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>com_01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: com_01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>com_02.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: com_02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>aps_01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: aps_01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>aps_02.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: aps_02.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>