<SEC-DOCUMENT>0001821268-21-000496-index.html : 20211203
<SEC-HEADER>0001821268-21-000496.hdr.sgml : 20211203
<ACCEPTANCE-DATETIME>20211203120551
ACCESSION NUMBER:		0001821268-21-000496
CONFORMED SUBMISSION TYPE:	N-CSRS
PUBLIC DOCUMENT COUNT:		14
CONFORMED PERIOD OF REPORT:	20210930
FILED AS OF DATE:		20211203
DATE AS OF CHANGE:		20211203
EFFECTIVENESS DATE:		20211203

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NUVEEN SELECT TAX FREE INCOME PORTFOLIO
		CENTRAL INDEX KEY:			0000883618
		IRS NUMBER:				363806843
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		N-CSRS
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-06548
		FILM NUMBER:		211469220

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

	MAIL ADDRESS:	
		STREET 1:		333 W WACKER DR
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
</SEC-HEADER>
<DOCUMENT>
<TYPE>N-CSRS
<SEQUENCE>1
<FILENAME>nxp.htm
<DESCRIPTION>NXP
<TEXT>
Document 1 - file: nxp.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.CERT
<SEQUENCE>2
<FILENAME>nxp_ex99cert.htm
<DESCRIPTION>CERTIFICATIONS
<TEXT>
Document 2 - file: nxp_ex99cert.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.906 CERT
<SEQUENCE>3
<FILENAME>nxp_ex99cert906.htm
<DESCRIPTION>CERTIFICATION
<TEXT>
Document 3 - file: nxp_ex99cert906.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>image_001.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: image_001.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>image_002.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: image_002.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>image_003.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: image_003.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>image_004.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: image_004.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>image_005.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: image_005.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>image_006.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: image_006.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>image_007.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: image_007.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>image_008.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 11 - file: image_008.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>image_009.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 12 - file: image_009.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>image_010.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 13 - file: image_010.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>image_011.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 14 - file: image_011.gif

</DOCUMENT>
</SEC-DOCUMENT>