<SEC-DOCUMENT>0001193125-25-300003-index.html : 20251126
<SEC-HEADER>0001193125-25-300003.hdr.sgml : 20251126
<ACCEPTANCE-DATETIME>20251126142610
ACCESSION NUMBER:		0001193125-25-300003
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		5
CONFORMED PERIOD OF REPORT:	20250930
FILED AS OF DATE:		20251126
DATE AS OF CHANGE:		20251126
EFFECTIVENESS DATE:		20251126

FILER:

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

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-22269
		FILM NUMBER:		251528794

	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 National Municipal Trust
		DATE OF NAME CHANGE:	20090126
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>d55436dncsrs.htm
<DESCRIPTION>EATON VANCE NATIONAL MUNICIPAL OPPORTUNITIES TRUST
<TEXT>
Document 1 - file: d55436dncsrs.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d55436dex99cert.htm
<DESCRIPTION>SECTION 302 CERTIFICATION
<TEXT>
Document 2 - file: d55436dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906 CERT
<SEQUENCE>3
<FILENAME>d55436dex99906cert.htm
<DESCRIPTION>SECTION 906 CERTIFICATION
<TEXT>
Document 3 - file: d55436dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g55436img310b302c2.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g55436img310b302c2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g55436imgc445317a1.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g55436imgc445317a1.gif

</DOCUMENT>
</SEC-DOCUMENT>