<SEC-DOCUMENT>0001193125-23-136853-index.html : 20230505
<SEC-HEADER>0001193125-23-136853.hdr.sgml : 20230505
<ACCEPTANCE-DATETIME>20230505133723
ACCESSION NUMBER:		0001193125-23-136853
CONFORMED SUBMISSION TYPE:	N-CSR
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20230228
FILED AS OF DATE:		20230505
DATE AS OF CHANGE:		20230505
EFFECTIVENESS DATE:		20230505

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NUVEEN CALIFORNIA SELECT TAX FREE INCOME PORTFOLIO
		CENTRAL INDEX KEY:			0000885732
		IRS NUMBER:				363828111
		STATE OF INCORPORATION:			MA

	FILING VALUES:
		FORM TYPE:		N-CSR
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06623
		FILM NUMBER:		23892763

	BUSINESS ADDRESS:	
		STREET 1:		333 W WACKER DR
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		3129178200

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

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NUVEEN INSURED CALIFORNIA SELECT TAX FREE INCOME PORTFOLIO
		DATE OF NAME CHANGE:	19920929

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NUVEEN CALIFORNIA SELECT TAX FREE INCOME PORTFOLIO
		DATE OF NAME CHANGE:	19600201
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSR
<SEQUENCE>1
<FILENAME>d494043dncsr.htm
<DESCRIPTION>NUVEEN CALIFORNIA SELECT TAX FREE INCOME PORTFOLIO
<TEXT>
Document 1 - file: d494043dncsr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d494043dex99cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT
<TEXT>
Document 2 - file: d494043dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906 CERT
<SEQUENCE>3
<FILENAME>d494043dex99906cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT
<TEXT>
Document 3 - file: d494043dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.PROXYVOTE
<SEQUENCE>4
<FILENAME>d494043dex99proxyvote.htm
<DESCRIPTION>EX-99.PROXYVOTE
<TEXT>
Document 4 - file: d494043dex99proxyvote.htm

</DOCUMENT>
</SEC-DOCUMENT>