<SEC-DOCUMENT>0000940394-20-000650.txt : 20200323
<SEC-HEADER>0000940394-20-000650.hdr.sgml : 20200323
<ACCEPTANCE-DATETIME>20200323095001
ACCESSION NUMBER:		0000940394-20-000650
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200323
DATE AS OF CHANGE:		20200323
EFFECTIVENESS DATE:		20200323

FILER:

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

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-227968
		FILM NUMBER:		20733972

	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>497
<SEQUENCE>1
<FILENAME>evfprosupp.htm
<DESCRIPTION>EATON VANCE SENIOR INCOME TRUST THRESHOLD SUPPLEMENT DTD 3-23-2020
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<P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 15pt; text-align: center"><FONT STYLE="font-size: 10pt"><B>EATON
VANCE SENIOR INCOME TRUST<BR>
Supplement to </B></FONT><B><FONT STYLE="font-size: 9pt">Prospectus</FONT> <FONT STYLE="font-size: 10pt">dated October 24, 2019
and Prospectus Supplement dated October 24, 2019</FONT></B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; text-align: justify; margin-right: 0; margin-left: 0">The following replaces
any references, contained either in the Prospectus or the Prospectus Supplement, with respect to the Fund&#8217;s: (i) last reported
sale price; (ii) net asset value (&#8220;NAV&#8221;) per Common Share; (iii) percentage premium to NAV per Common Share; (iv) number
of Common Shares outstanding; and (v) net assets.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; text-align: justify; margin-right: 0; margin-left: 0.5in">On March 20, 2020,
the last reported sale price, NAV per Common Share and percentage premium to NAV per Common Share, were $4.06, $5.01 and (18.96)%,
respectively. As of March 20, 2020, we had 37,866,607 Common Shares outstanding and net assets of approximately $189,629,378.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; text-align: justify; margin-right: 0; margin-left: 0">The following replaces
the last sentence in the first paragraph under &#8220;Use of Proceeds&#8221; in the Prospectus Supplement:</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; text-align: justify; margin-right: 0; margin-left: 0.5in">Assuming the sale
of all of the Common Shares offered under this Prospectus Supplement and the accompanying Prospectus, at the last reported sale
price of $4.06 per share for our Common Shares on the NYSE as of March 20, 2020, we estimate that the net proceeds of this offering
will be approximately $7,389,968 after deducting the estimated sales load and the estimated offering expenses payable by the Fund.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; text-align: justify; margin-right: 0; margin-left: 0.5in">&#8194;</P>

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    <TD STYLE="width: 52%; padding-top: 4.5pt; padding-bottom: 4.5pt; font: 12pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">March 23, 2020</FONT></TD>
    <TD STYLE="width: 48%; padding-top: 4.5pt; padding-bottom: 4.5pt; font: 12pt Times New Roman, Times, Serif; text-align: right">&nbsp;</TD></TR>
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<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 12pt">&nbsp;</P>


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