<SEC-DOCUMENT>0001145549-21-036013-index.html : 20210615
<SEC-HEADER>0001145549-21-036013.hdr.sgml : 20210615
<ACCEPTANCE-DATETIME>20210614182039
ACCESSION NUMBER:		0001145549-21-036013
CONFORMED SUBMISSION TYPE:	NT N-CEN
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20210331
FILED AS OF DATE:		20210615
DATE AS OF CHANGE:		20210614
EFFECTIVENESS DATE:		20210615

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NUVEEN SELECT MATURITIES MUNICIPAL FUND
		CENTRAL INDEX KEY:			0000890119
		IRS NUMBER:				363837799
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			0531

	FILING VALUES:
		FORM TYPE:		NT N-CEN
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-07056
		FILM NUMBER:		211015998

	BUSINESS ADDRESS:	
		STREET 1:		333 WEST WACKER DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3129177200

	MAIL ADDRESS:	
		STREET 1:		333 W WACKER DRIVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NUVEEN INTERMEDIATE OPPORTUNITY MUNICIPAL FUND
		DATE OF NAME CHANGE:	19600201
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CEN
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>INTERNAL CONTROL RPT
<SEQUENCE>2
<FILENAME>internalctrlreportkpmg_0331.htm
<DESCRIPTION>INTERNAL CONTROL REPORT - 03.31
<TEXT>
Document 2 - file: internalctrlreportkpmg_0331.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>MATERIAL AMENDMENTS
<SEQUENCE>3
<FILENAME>nuveeng1b1_ma033121.htm
<DESCRIPTION>NUVEEN AMENDMENT - 03.31
<TEXT>
Document 3 - file: nuveeng1b1_ma033121.htm

</DOCUMENT>
</SEC-DOCUMENT>