<SEC-DOCUMENT>0000940394-21-001321.txt : 20211001
<SEC-HEADER>0000940394-21-001321.hdr.sgml : 20211001
<ACCEPTANCE-DATETIME>20211001080622
ACCESSION NUMBER:		0000940394-21-001321
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20211001
DATE AS OF CHANGE:		20211001

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Eaton Vance National Municipal Opportunities Trust
		CENTRAL INDEX KEY:			0001454741
		IRS NUMBER:				000000000
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-234007
		FILM NUMBER:		211297150

	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

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Eaton Vance National Municipal Trust
		DATE OF NAME CHANGE:	20090126
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>eotsupp.htm
<DESCRIPTION>EATON VANCE NATIONAL MUNICIPAL OPPORTUNITIES TRUST PRO AND SAI SUPP DTD 10-1-2021
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<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 9pt 0 0; text-align: center"><B>EATON VANCE NATIONAL MUNICIPAL OPPORTUNITIES
TRUST</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 9pt 0 0; text-align: center"><B>Supplement to Prospectus dated July 22, 2021</B></P>

<P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 3pt 0 6pt"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6pt 0"><B>The following replaces the seventh paragraph under &ldquo;The Adviser&rdquo;
in &ldquo;Management of the Trust&rdquo; in the Prospectus<FONT STYLE="font-size: 11pt">:</FONT></B></P>

<P STYLE="font: 10pt NewsGoth Lt BT; margin: 0"><FONT STYLE="font-family: NewsGothicBT-Light">Cynthia J. Clemson and William J. Delahunty,
Jr. are responsible for the overall and day-to-day management of the Trust</FONT><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif">&rsquo;</FONT><FONT STYLE="font-family: NewsGothicBT-Light">s
investments. Ms. Clemson is a Vice President of Eaton Vance, is Co-Director of Municipal Investments and has been a portfolio manager
of the Trust since May 2009. Mr. Delahunty is a Vice President of Eaton Vance, has been a portfolio manager of the Trust since October
2021 and has been employed by Eaton Vance for more than five years. Ms. Clemson has managed other Eaton Vance portfolios for more than
five years.</FONT></P>

<P STYLE="font: 10pt NewsGothicBT-Light; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6pt 0 3pt">October 1, 2021</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 3pt 0 0">&nbsp;</P>


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<P STYLE="font: 10pt/107% Arial, Helvetica, Sans-Serif; margin: 0 0 8pt">&nbsp;</P>

<P STYLE="font: 10pt/101% Arial, Helvetica, Sans-Serif; margin: 0; text-align: center"><B>EATON VANCE NATIONAL MUNICIPAL OPPORTUNITIES
TRUST</B></P>

<P STYLE="font: 10pt/101% Arial, Helvetica, Sans-Serif; margin: 0 0 0 14.1pt; text-align: center"><FONT STYLE="letter-spacing: -0.05pt"><B>Supplement
to Statement of Additional Information dated </B></FONT><B>July 22, 2021</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 3pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 3pt 0"><B>The following replaces the first and second paragraphs and the tables
under &ldquo;Portfolio Managers.&rdquo; in &ldquo;Investment Advisory and Other Services&rdquo;:</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 3pt 0">Cynthia J. Clemson and William J. Delahunty, Jr. serve as the portfolio
managers of the Trust. The following table shows, as of the Trust&rsquo;s most recent fiscal year end, the number of accounts Ms. Clemson
and Mr. Delahunty managed in each of the listed categories and the total assets (in millions of dollars) in the accounts managed within
each category. The table also shows the number of accounts with respect to which the advisory fee is based on the performance of the account,
if any, and the total assets (in millions of dollars) in those accounts.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 3pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 9pt NewsGoth XCn BT; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 31%; padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-bottom: Black 1pt solid; padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Number of<BR>
All Accounts</FONT></TD>
    <TD STYLE="width: 15%; border-bottom: Black 1pt solid; padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Total Assets of<BR>
All Accounts</FONT></TD>
    <TD STYLE="width: 20%; border-bottom: Black 1pt solid; padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Number of Accounts<BR>
Paying a Performance Fee</FONT></TD>
    <TD STYLE="width: 20%; border-bottom: Black 1pt solid; padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Total Assets of Accounts<BR>
Paying a Performance Fee</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 13.7pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Cynthia J. Clemson</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt">&nbsp;</TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt">&nbsp;</TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt">&nbsp;</TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Registered Investment Companies</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">10</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$4,567.7</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Other Pooled Investment Vehicles</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Other Accounts</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">3</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$240.8</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 13.7pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">William J. Delahunty, Jr.</FONT><FONT STYLE="font-family: NewsGoth XCn BT,sans-serif"><SUP>(1)</SUP></FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt">&nbsp;</TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt">&nbsp;</TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt">&nbsp;</TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Registered Investment Companies</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Other Pooled Investment Vehicles</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Other Accounts</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">0</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">$0</FONT></TD></TR>
  </TABLE>
<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 7pt/10pt Arial Narrow, Helvetica, Sans-Serif; margin-top: 6pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 9pt"><SUP>(1)</SUP></TD><TD><FONT STYLE="vertical-align: baseline">As of July 31, 2021.</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 3pt 0">The following table shows the dollar range of equity securities beneficially
owned in the Trust by its portfolio manager(s) as of the Trust&rsquo;s most recent fiscal year ended March 31, 2021 and in the Eaton Vance
family of funds as of December 31, 2020.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="CENTER" STYLE="font: 9pt NewsGoth XCn BT; width: 80%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 27%; border-bottom: Black 1pt solid; padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Portfolio Managers</FONT></TD>
    <TD STYLE="width: 37%; border-bottom: Black 1pt solid; padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Dollar Range of Equity Securities<BR>
Beneficially Owned in the Trust</FONT></TD>
    <TD STYLE="width: 36%; border-bottom: Black 1pt solid; padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Aggregate Dollar Range of Equity<BR>
Securities Beneficially Owned<BR>
in the Eaton Vance Family of Funds</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Cynthia J. Clemson</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">None</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Over $1,000,000</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding: 3pt 5.4pt 3pt 2.9pt; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">William J. Delahunty, Jr.<FONT STYLE="font-size: 7pt"><SUP>(1)</SUP></FONT></FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">None</FONT></TD>
    <TD STYLE="padding: 3pt 5.4pt; text-align: center; line-height: 10pt"><FONT STYLE="font-family: Arial Narrow, Helvetica, Sans-Serif">Over $1,000,000</FONT></TD></TR>
  </TABLE>
<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 7pt/10pt Arial Narrow, Helvetica, Sans-Serif; margin-top: 6pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 9pt"><SUP>(1)</SUP></TD><TD><FONT STYLE="vertical-align: baseline">As of July 31, 2021.</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 7.25pt 0 3pt"><FONT STYLE="letter-spacing: -0.05pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 7.25pt 0 3pt"><FONT STYLE="letter-spacing: -0.05pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 7.25pt 0 3pt"><FONT STYLE="letter-spacing: -0.05pt">October 1, 2021</FONT></P>


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