<SEC-DOCUMENT>0001193125-25-154536-index.html : 20250702
<SEC-HEADER>0001193125-25-154536.hdr.sgml : 20250702
<ACCEPTANCE-DATETIME>20250702103243
ACCESSION NUMBER:		0001193125-25-154536
CONFORMED SUBMISSION TYPE:	N-CSR/A
PUBLIC DOCUMENT COUNT:		22
CONFORMED PERIOD OF REPORT:	20250228
FILED AS OF DATE:		20250702
DATE AS OF CHANGE:		20250702
EFFECTIVENESS DATE:		20250702

FILER:

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

	FILING VALUES:
		FORM TYPE:		N-CSR/A
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06623
		FILM NUMBER:		251098789

	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/A
<SEQUENCE>1
<FILENAME>d36931dncsra.htm
<DESCRIPTION>NUVEEN CALIFORNIA SELECT TAX FREE INCOME PORTFOLIO
<TEXT>
Document 1 - file: d36931dncsra.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>d36931dex99cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT
<TEXT>
Document 2 - file: d36931dex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906 CERT
<SEQUENCE>3
<FILENAME>d36931dex99906cert.htm
<DESCRIPTION>CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT
<TEXT>
Document 3 - file: d36931dex99906cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.PROXYVOTE
<SEQUENCE>4
<FILENAME>d36931dex99proxyvote.htm
<DESCRIPTION>EX-99.PROXYVOTE
<TEXT>
Document 4 - file: d36931dex99proxyvote.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.19C
<SEQUENCE>5
<FILENAME>d36931dex9919c.htm
<DESCRIPTION>CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<TEXT>
Document 5 - file: d36931dex9919c.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.SCH
<SEQUENCE>7
<FILENAME>ncstfip-20250228.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
Document 7 - file: ncstfip-20250228.xsd

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g36931dsp1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g36931dsp1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g36931dsp1a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g36931dsp1a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>g36931g1g69h01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: g36931g1g69h01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>g36931g1g78y01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: g36931g1g78y01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>g36931g1g78y02.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: g36931g1g78y02.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>g36931g1g80y01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: g36931g1g80y01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>g36931g1g80y02.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: g36931g1g80y02.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>g36931g1g91e00.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: g36931g1g91e00.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>17
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 17 - file: R1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>18
<FILENAME>Show.js
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 18 - file: Show.js

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>19
<FILENAME>report.css
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 19 - file: report.css

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>21
<FILENAME>FilingSummary.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 21 - file: FilingSummary.html

Document 21 - RAW XML: FilingSummary.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>JSON
<SEQUENCE>24
<FILENAME>MetaLinks.json
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 24 - file: MetaLinks.json

</DOCUMENT>
<DOCUMENT>
<TYPE>ZIP
<SEQUENCE>25
<FILENAME>0001193125-25-154536-xbrl.zip
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 25 - file: 0001193125-25-154536-xbrl.zip

</DOCUMENT>
<DOCUMENT>
<TYPE>XML
<SEQUENCE>26
<FILENAME>d36931dncsra_htm.xml
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 26 - file: d36931dncsra_htm.html

Document 26 - RAW XML: d36931dncsra_htm.xml

</DOCUMENT>
</SEC-DOCUMENT>