<SEC-DOCUMENT>0001193125-21-254906-index.html : 20210824
<SEC-HEADER>0001193125-21-254906.hdr.sgml : 20210824
<ACCEPTANCE-DATETIME>20210824144802
ACCESSION NUMBER:		0001193125-21-254906
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		8
CONFORMED PERIOD OF REPORT:	20210630
FILED AS OF DATE:		20210824
DATE AS OF CHANGE:		20210824
EFFECTIVENESS DATE:		20210824

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			EATON VANCE SENIOR INCOME TRUST
		CENTRAL INDEX KEY:			0001070732
		IRS NUMBER:				043435040

	FILING VALUES:
		FORM TYPE:		N-CSR
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-09013
		FILM NUMBER:		211201433

	BUSINESS ADDRESS:	
		STREET 1:		TWO INTERNATIONAL PLACE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		617-482-8260

	MAIL ADDRESS:	
		STREET 1:		TWO INTERNATIONAL PLACE
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSR
<SEQUENCE>1
<FILENAME>d181599dncsr.htm
<DESCRIPTION>EATON VANCE SENIOR INCOME TRUST
<TEXT>
Document 1 - file: d181599dncsr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d181599dex99cert.htm
<DESCRIPTION>EX-99.CERT SECTION 302 CERTIFICATION
<TEXT>
Document 2 - file: d181599dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906CERT
<SEQUENCE>3
<FILENAME>d181599dex99906cert.htm
<DESCRIPTION>EX-99.906CERT SECTION 906 CERTIFICATION
<TEXT>
Document 3 - file: d181599dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g174985g01c03.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g174985g01c03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g174985g01c08.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g174985g01c08.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g174985g11o68.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g174985g11o68.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g174985g40r04.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g174985g40r04.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g174985g85w92.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g174985g85w92.jpg

</DOCUMENT>
</SEC-DOCUMENT>