<SEC-DOCUMENT>0000940394-21-001321-index.html : 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
<TEXT>
Document 1 - file: eotsupp.htm

</DOCUMENT>
</SEC-DOCUMENT>