UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number         811-6548         

        Nuveen Select Tax-Free Income Portfolio         
(Exact name of registrant as specified in charter)

Nuveen Investments
        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)

Kevin J. McCarthy Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)

Registrant's telephone number, including area code:         312-917-7700        

Date of fiscal year end:            03/31          

Date of reporting period:         12/31/08         

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments

		Portfolio of Investments (Unaudited)
		Nuveen Select Tax-Free Income Portfolio (NXP)
		December 31, 2008
Principal				Optional Call
Amount (000)		Description (1)		Provisions (2)		Ratings (3)		Value
		Municipal Bonds – 98.2%
		Alaska – 1.9%
$          2,475		Alaska Municipal Bond Bank Authority, General Obligation Bonds, Series 2003E, 5.250%, 12/01/23		12/13 at 100.00		AA (4)	$	2,834,222
		(Pre-refunded 12/01/13) – MBIA Insured
2,500		Northern Tobacco Securitization Corporation, Alaska, Tobacco Settlement Asset-Backed Bonds,		6/14 at 100.00		Baa3		1,249,700
		Series 2006A, 5.000%, 6/01/46
4,975		Total Alaska						4,083,922
		Arkansas – 0.3%
5,915		Arkansas Development Finance Authority, Tobacco Settlement Revenue Bonds, Arkansas Cancer		No Opt. Call		Aa3		584,520
		Research Center Project, Series 2006, 0.000%, 7/01/46 – AMBAC Insured
		California – 5.2%
2,000		Alameda Corridor Transportation Authority, California, Subordinate Lien Revenue Bonds, Series		10/17 at 100.00		A		1,672,400
		2004A, 0.000%, 10/01/25 – AMBAC Insured
3,325		California Department of Water Resources, Power Supply Revenue Bonds, Series 2002A,		5/12 at 101.00		Aa3		3,612,081
		6.000%, 5/01/14
3,000		Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed		6/13 at 100.00		AAA		3,484,260
		Bonds, Series 2003A-1, 6.750%, 6/01/39 (Pre-refunded 6/01/13)
1,130		Los Angeles Department of Water and Power, California, Waterworks Revenue Refunding Bonds,		7/11 at 100.00		AA		1,028,176
		Series 2001A, 5.125%, 7/01/41 – FGIC Insured
365		Los Angeles, California, Parking System Revenue Bonds, Series 1999A, 5.250%, 5/01/29 –		5/09 at 101.00		A		349,579
		AMBAC Insured
1,000		Moreno Valley Unified School District, Riverside County, California, General Obligation Bonds,		No Opt. Call		AA		404,370
		Series 2007, 0.000%, 8/01/23 – MBIA Insured
750		Tobacco Securitization Authority of Northern California, Tobacco Settlement Asset-Backed		6/15 at 100.00		BBB		409,433
		Bonds, Series 2005A-1, 5.500%, 6/01/45
1,150		Woodside Elementary School District, San Mateo County, California, General Obligation Bonds,		No Opt. Call		AA+		309,615
		Series 2007, 0.000%, 10/01/30 – AMBAC Insured
12,720		Total California						11,269,914
		Colorado – 11.7%
1,700		Colorado Health Facilities Authority, Revenue Bonds, Catholic Health Initiatives, Series		3/12 at 100.00		AA (4)		1,861,942
		2002A, 5.500%, 3/01/22 (ETM)
690		Colorado Health Facilities Authority, Revenue Bonds, Catholic Health Initiatives, Series		3/12 at 100.00		AA (4)		763,616
		2002A, 5.500%, 3/01/22 (Pre-refunded 3/01/12)
390		Colorado Water Resources and Power Development Authority, Small Water Resources Revenue		11/10 at 100.00		N/R		369,603
		Bonds, Series 2000A, 5.800%, 11/01/20 – FGIC Insured
8,225		Denver City and County, Colorado, Airport System Revenue Bonds, Series 1991D, 7.750%, 11/15/13		No Opt. Call		A+		8,714,633
		(Alternative Minimum Tax)
5,000		Denver City and County, Colorado, Airport System Revenue Refunding Bonds, Series 2001A,		11/11 at 100.00		AA		4,792,150
		5.625%, 11/15/17 – FGIC Insured (Alternative Minimum Tax)
3,000		Denver Convention Center Hotel Authority, Colorado, Senior Revenue Bonds, Convention Center		12/13 at 100.00		N/R (4)		3,351,540
		Hotel, Series 2003A, 5.000%, 12/01/23 (Pre-refunded 12/01/13) – SYNCORA GTY Insured
5,000		E-470 Public Highway Authority, Colorado, Senior Revenue Bonds, Series 2000B, 0.000%, 9/01/28		9/10 at 31.42		Aaa		1,519,750
		(Pre-refunded 9/01/10) – MBIA Insured
12,500		E-470 Public Highway Authority, Colorado, Toll Revenue Bonds, Series 2006A, 0.000%, 9/01/38 –		9/26 at 54.77		AA		779,625
		MBIA Insured
3,160		Northwest Parkway Public Highway Authority, Colorado, Revenue Bonds, Senior Series 2001A,		6/11 at 102.00		A (4)		3,484,058
		5.500%, 6/15/20 (Pre-refunded 6/15/11) – AMBAC Insured
39,665		Total Colorado						25,636,917
		District of Columbia – 0.1%
60		District of Columbia, Revenue Bonds, Catholic University of America, Series 1999, 5.625%,		10/09 at 101.00		A		59,522
		10/01/29 – AMBAC Insured
205		District of Columbia, Revenue Bonds, Catholic University of America, Series 1999, 5.625%,		10/09 at 101.00		A (4)		214,584
		10/01/29 (Pre-refunded 10/01/09) – AMBAC Insured
265		Total District of Columbia						274,106
		Florida – 7.3%
2,000		Halifax Hospital Medical Center, Florida, Revenue Bonds, Series 2006, 5.375%, 6/01/46		6/16 at 100.00		BBB+		1,073,020
5,000		Jacksonville Health Facilities Authority, Florida, Revenue Bonds, Ascension Health, Series		11/12 at 101.00		Aa1		4,448,800
		2002A, 5.250%, 11/15/32
10,000		JEA St. John’s River Power Park System, Florida, Revenue Refunding Bonds, Issue 2, Series		10/11 at 100.00		Aa2		10,438,899
		2002-17, 5.000%, 10/01/17
17,000		Total Florida						15,960,719
		Hawaii – 0.6%
1,330		Hawaii, Certificates of Participation, Kapolei State Office Building, Series 1998A, 5.000%,		5/09 at 101.00		A		1,345,707
		5/01/17 – AMBAC Insured
		Illinois – 13.0%
1,965		Board of Trustees of Southern Illinois University, Housing and Auxiliary Facilities System		No Opt. Call		AA		1,089,475
		Revenue Bonds, Series 1999A, 0.000%, 4/01/20 – MBIA Insured
2,600		Chicago Heights, Illinois, General Obligation Corporate Purpose Bonds, Series 1993, 5.650%,		6/09 at 100.00		AA		2,637,362
		12/01/17 – FGIC Insured
195		DuPage County Community School District 200, Wheaton, Illinois, General Obligation Bonds,		11/13 at 100.00		Aa3		202,221
		Series 2003B, 5.250%, 11/01/20 – FSA Insured
805		DuPage County Community School District 200, Wheaton, Illinois, General Obligation Bonds,		11/13 at 100.00		Aa3 (4)		913,216
		Series 2003B, 5.250%, 11/01/20 (Pre-refunded 11/01/13) – FSA Insured
600		Illinois Educational Facilities Authority, Student Housing Revenue Bonds, Educational		5/12 at 101.00		Aaa		682,302
		Advancement Foundation Fund, University Center Project, Series 2002, 6.000%,
		5/01/22 (Pre-refunded 5/01/12)
1,050		Illinois Finance Authority, Revenue Bonds, Loyola University of Chicago, Tender Option Bond		7/17 at 100.00		AA		838,068
		Trust 1137, 8.340%, 7/01/46 (IF)
4,000		Illinois Finance Authority, Revenue Bonds, Northwestern Memorial Hospital, Series 2004A,		8/14 at 100.00		AA+ (4)		4,684,680
		5.500%, 8/15/43 (Pre-refunded 8/15/14)
1,320		Illinois Health Facilities Authority, Revenue Bonds, Decatur Memorial Hospital, Series 2001,		10/11 at 100.00		A		1,303,975
		5.600%, 10/01/16
2,950		Illinois Health Facilities Authority, Revenue Bonds, Lake Forest Hospital, Series 2002A,		7/12 at 100.00		A–		2,927,757
		6.000%, 7/01/17
2,275		Illinois Health Facilities Authority, Revenue Refunding Bonds, Elmhurst Memorial Healthcare,		1/13 at 100.00		Baa1		2,229,568
		Series 2002, 6.250%, 1/01/17
60		Illinois Health Facilities Authority, Revenue Refunding Bonds, Evangelical Hospitals		No Opt. Call		N/R (4)		60,856
		Corporation, Series 1992B, 6.500%, 4/15/09 (ETM)
3,125		Metropolitan Pier and Exposition Authority, Illinois, Revenue Bonds, McCormick Place Expansion		No Opt. Call		AA		2,153,750
		Project, Series 1992A, 0.000%, 6/15/17 – FGIC Insured
810		Metropolitan Pier and Exposition Authority, Illinois, Revenue Bonds, McCormick Place Expansion		No Opt. Call		AAA		225,950
		Project, Series 2002A, 0.000%, 6/15/30 – MBIA Insured
5,000		Metropolitan Pier and Exposition Authority, Illinois, Revenue Refunding Bonds, McCormick Place		6/12 at 101.00		AAA		5,021,650
		Expansion Project, Series 2002B, 5.000%, 6/15/21 – MBIA Insured
1,300		Schaumburg, Illinois, General Obligation Bonds, Series 2004B, 5.250%, 12/01/34 – FGIC Insured		12/14 at 100.00		AA+		1,269,359
		Yorkville, Illinois, General Obligation Debt Certificates, Series 2003:
1,000		5.000%, 12/15/19 (Pre-refunded 12/15/11) – RAAI Insured		12/11 at 100.00		BBB+ (4)		1,095,600
1,000		5.000%, 12/15/20 (Pre-refunded 12/15/11) – RAAI Insured		12/11 at 100.00		BBB+ (4)		1,095,600
30,055		Total Illinois						28,431,389
		Indiana – 9.5%
5,000		Duneland School Building Corporation, Indiana, First Mortgage Refunding Bonds, Series 1999,		2/09 at 101.00		AA		5,057,950
		5.125%, 2/01/18 – MBIA Insured
1,000		Franklin Community Multi-School Building Corporation, Marion County, Indiana, First Mortgage		7/14 at 100.00		A (4)		1,137,030
		Revenue Bonds, Series 2004, 5.000%, 7/15/22 (Pre-refunded 7/15/14) – FGIC Insured
2,000		Indiana Health Facility Financing Authority, Hospital Revenue Refunding Bonds, Columbus		No Opt. Call		AAA		2,234,700
		Regional Hospital, Series 1993, 7.000%, 8/15/15 – FSA Insured
1,000		Indiana Health Facility Financing Authority, Revenue Bonds, Community Foundation of Northwest		3/17 at 100.00		BBB		666,590
		Indiana, Series 2007, 5.500%, 3/01/37
9,855		Indianapolis Local Public Improvement Bond Bank, Indiana, Waterworks Project, Series 2002A,		7/12 at 100.00		AAA		10,906,922
		5.125%, 7/01/21 (Pre-refunded 7/01/12) – MBIA Insured
750		West Clark 2000 School Building Corporation, Clark County, Indiana, First Mortgage Bonds,		1/15 at 100.00		AA+		762,210
		Series 2005, 5.000%, 7/15/22 – MBIA Insured
19,605		Total Indiana						20,765,402
		Iowa – 1.3%
1,000		Iowa Tobacco Settlement Authority, Asset Backed Settlement Revenue Bonds, Series 2005C,		6/15 at 100.00		BBB		517,840
		5.375%, 6/01/38
4,000		Iowa Tobacco Settlement Authority, Tobacco Asset-Backed Revenue Bonds, Series 2005B,		6/17 at 100.00		BBB		2,399,080
		5.600%, 6/01/34
5,000		Total Iowa						2,916,920
		Kansas – 0.4%
500		Lawrence, Kansas, Hospital Revenue Bonds, Lawrence Memorial Hospital, Series 2006,		7/16 at 100.00		A3		330,675
		4.875%, 7/01/36
750		Wamego, Kansas, Pollution Control Revenue Bonds, Kansas Gas and Electric Company, Series 2004,		6/14 at 100.00		AA		565,935
		5.300%, 6/01/31 – MBIA Insured
1,250		Total Kansas						896,610
		Kentucky – 0.5%
1,100		Jefferson County, Kentucky, Health System Revenue Bonds, Alliant Health System Inc., Series		4/09 at 101.00		AA (4)		1,113,420
		1998, 5.125%, 10/01/18 – MBIA Insured (ETM)
		Louisiana – 0.3%
1,000		Tobacco Settlement Financing Corporation, Louisiana, Tobacco Settlement Asset-Backed Bonds,		5/11 at 101.00		BBB		627,740
		Series 2001B, 5.875%, 5/15/39
		Massachusetts – 1.0%
500		Massachusetts Health and Educational Facilities Authority, Revenue Bonds, CareGroup Inc.,		7/18 at 100.00		A3		348,760
		Series 2008E-1, 5.000%, 7/01/28
20		Massachusetts Health and Educational Facilities Authority, Revenue Bonds, Partners HealthCare		7/11 at 101.00		AA		21,207
		System Inc., Series 2001C, 6.000%, 7/01/17
480		Massachusetts Health and Educational Facilities Authority, Revenue Bonds, Partners HealthCare		7/11 at 101.00		AAA		533,971
		System Inc., Series 2001C, 6.000%, 7/01/17 (Pre-refunded 7/01/11)
1,055		Massachusetts Turnpike Authority, Metropolitan Highway System Revenue Bonds, Senior Series		1/09 at 100.00		AA		746,676
		1997A, 5.000%, 1/01/37 – MBIA Insured
730		Massachusetts Turnpike Authority, Metropolitan Highway System Revenue Bonds, Subordinate		1/09 at 101.00		AA		510,460
		Series 1999A, 5.000%, 1/01/39 – AMBAC Insured
2,785		Total Massachusetts						2,161,074
		Michigan – 1.5%
1,000		Michigan State Hospital Finance Authority, Hospital Revenue Bonds, Detroit Medical Center		2/09 at 101.00		BB		721,730
		Obligated Group, Series 1998A, 5.125%, 8/15/18
2,900		Michigan State Hospital Finance Authority, Hospital Revenue Refunding Bonds, Trinity Health		12/12 at 100.00		AA		2,607,187
		Credit Group, Series 2002C, 5.375%, 12/01/30
3,900		Total Michigan						3,328,917
		Minnesota – 0.1%
230		Minnesota Housing Finance Agency, Single Family Mortgage Revenue Bonds, Series 1995A,		1/09 at 101.00		AA+		231,645
		5.200%, 1/01/17
		Missouri – 0.6%
5,000		Kansas City Municipal Assistance Corporation, Missouri, Leasehold Revenue Bonds, Series		No Opt. Call		AA–		1,402,550
		2004B-1, 0.000%, 4/15/30 – AMBAC Insured
		Nevada – 5.3%
2,500		Clark County, Nevada, Motor Vehicle Fuel Tax Highway Improvement Revenue Bonds, Series 2003,		7/13 at 100.00		AA–		2,484,725
		5.000%, 7/01/23 – AMBAC Insured
		Director of Nevada State Department of Business and Industry, Revenue Bonds, Las Vegas
		Monorail Project, First Tier, Series 2000:
2,360		0.000%, 1/01/21 – AMBAC Insured		No Opt. Call		A		626,745
4,070		0.000%, 1/01/22 – AMBAC Insured		No Opt. Call		A		970,166
6,025		5.375%, 1/01/40 – AMBAC Insured		1/10 at 100.00		A		3,266,213
1,515		Reno, Nevada, Capital Improvement Revenue Bonds, Series 2002, 5.500%, 6/01/21 – FGIC Insured		6/12 at 100.00		Baa1		1,371,333
2,555		Reno, Nevada, Capital Improvement Revenue Bonds, Series 2002, 5.500%, 6/01/21 (Pre-refunded		6/12 at 100.00		Baa1 (4)		2,850,205
		6/01/12) – FGIC Insured
19,025		Total Nevada						11,569,387
		New Hampshire – 0.2%
380		New Hampshire Housing Finance Authority, Single Family Mortgage Acquisition Bonds, Series		5/11 at 100.00		Aa2		367,574
		2001A, 5.600%, 7/01/21 (Alternative Minimum Tax)
		New Jersey – 2.5%
2,500		New Jersey Health Care Facilities Financing Authority, Revenue Bonds, Somerset Medical Center,		7/13 at 100.00		Ba2		1,529,175
		Series 2003, 5.500%, 7/01/23
		Tobacco Settlement Financing Corporation, New Jersey, Tobacco Settlement Asset-Backed Bonds,
		Series 2002:
1,460		5.750%, 6/01/32 (Pre-refunded 6/01/12)		6/12 at 100.00		AAA		1,581,472
1,000		6.000%, 6/01/37 (Pre-refunded 6/01/12)		6/12 at 100.00		AAA		1,132,690
2,500		Tobacco Settlement Financing Corporation, New Jersey, Tobacco Settlement Asset-Backed Bonds,		6/17 at 100.00		BBB		1,269,425
		Series 2007-1A, 5.000%, 6/01/41
7,460		Total New Jersey						5,512,762
		New Mexico – 2.0%
1,000		New Mexico Mortgage Finance Authority, Multifamily Housing Revenue Bonds, St Anthony, Series		9/17 at 100.00		AAA		771,430
		2007A, 5.250%, 9/01/42 (Alternative Minimum Tax)
4,000		University of New Mexico, FHA-Insured Mortgage Hospital Revenue Bonds, Series 2004, 4.625%,		7/14 at 100.00		AAA		3,656,880
		7/01/25 – FSA Insured
5,000		Total New Mexico						4,428,310
		New York – 1.2%
1,000		Dormitory Authority of the State of New York, FHA-Insured Mortgage Revenue Bonds, Kaleida		2/14 at 100.00		AAA		933,780
		Health, Series 2004, 5.050%, 2/15/25
1,215		Dormitory Authority of the State of New York, Revenue Bonds, Mount Sinai NYU Health Obligated		7/10 at 101.00		A3		1,215,134
		Group, Series 2000A, 6.500%, 7/01/17
385		Dormitory Authority of the State of New York, Revenue Bonds, Mount Sinai NYU Health Obligated		7/10 at 101.00		A3 (4)		419,604
		Group, Series 2000A, 6.500%, 7/01/17 (Pre-refunded 7/01/10)
2,600		Total New York						2,568,518
		North Carolina – 1.6%
1,000		North Carolina Eastern Municipal Power Agency, Power System Revenue Bonds, Series 2008C,		1/19 at 100.00		BBB+		988,410
		6.750%, 1/01/24
2,195		North Carolina Eastern Municipal Power Agency, Power System Revenue Refunding Bonds, Series		3/09 at 100.00		BBB+		1,999,535
		1993B, 5.500%, 1/01/21
500		Raleigh Durham Airport Authority, North Carolina, Airport Revenue Bonds, Series 2001A, 5.250%,		5/11 at 101.00		Aa3		512,670
		11/01/17 – FGIC Insured
3,695		Total North Carolina						3,500,615
		Ohio – 0.5%
1,500		Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Revenue		6/17 at 100.00		BBB		873,750
		Bonds, Senior Lien, Series 2007A-2, 6.000%, 6/01/42
300		Lebanon, Ohio, Electric System Mortgage Revenue Bonds, Series 2001, 5.500%, 12/01/17		12/10 at 101.00		A (4)		326,145
		(Pre-refunded 12/01/10) – AMBAC Insured
1,800		Total Ohio						1,199,895
		Oklahoma – 1.9%
1,000		Norman Regional Hospital Authority, Oklahoma, Hospital Revenue Bonds, Series 2005,		9/16 at 100.00		BBB–		553,900
		5.375%, 9/01/36
4,000		Oklahoma Development Finance Authority, Revenue Bonds, St. John Health System, Series 2004,		2/14 at 100.00		AA–		3,682,280
		5.000%, 2/15/24
5,000		Total Oklahoma						4,236,180
		Pennsylvania – 0.8%
500		Pennsylvania Higher Educational Facilities Authority, Revenue Bonds, Widener University,		7/13 at 100.00		BBB+		372,235
		Series 2003, 5.250%, 7/15/24
700		Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Series 2004A, 5.500%, 12/01/31 –		12/14 at 100.00		Aa3		704,529
		AMBAC Insured
520		Pennsylvania, General Obligation Bonds, Second Series 2001, 5.000%, 9/15/20 (Pre-refunded		9/11 at 101.00		AAA		573,118
		9/15/11) – FSA Insured
1,720		Total Pennsylvania						1,649,882
		South Carolina – 8.4%
1,250		Dorchester County School District 2, South Carolina, Installment Purchase Revenue Bonds,		12/14 at 100.00		AA–		1,275,013
		GROWTH, Series 2004, 5.250%, 12/01/20
10,000		Greenville County School District, South Carolina, Installment Purchase Revenue Bonds, Series		12/12 at 101.00		AA (4)		11,562,297
		2002, 5.875%, 12/01/19 (Pre-refunded 12/01/12)
1,500		Lexington County Health Service District, South Carolina, Hospital Revenue Refunding and		11/13 at 100.00		A+ (4)		1,737,930
		Improvement Bonds, Series 2003, 6.000%, 11/01/18 (Pre-refunded 11/01/13)
520		South Carolina JOBS Economic Development Authority, Economic Development Revenue Bonds,		11/12 at 100.00		A– (4)		586,882
		Bon Secours Health System Inc., Series 2002A, 5.625%, 11/15/30 (Pre-refunded 11/15/12)
1,980		South Carolina JOBS Economic Development Authority, Economic Development Revenue Bonds, Bon		11/12 at 100.00		A–		1,586,396
		Secours Health System Inc., Series 2002B, 5.625%, 11/15/30
1,540		Tobacco Settlement Revenue Management Authority, South Carolina, Tobacco Settlement		5/12 at 100.00		BBB (4)		1,617,262
		Asset-Backed Bonds, Series 2001B, 6.000%, 5/15/22 (Pre-refunded 5/15/12)
16,790		Total South Carolina						18,365,780
		Texas – 7.1%
5,000		Brazos River Harbor Navigation District, Brazoria County, Texas, Environmental Facilities		5/12 at 101.00		A3		4,019,450
		Revenue Bonds, Dow Chemical Company Project, Series 2002A-6, 6.250%, 5/15/33
		(Mandatory put 5/15/17) (Alternative Minimum Tax)
1,000		City of Dallas, Texas, Civic Center Convention Complex Refunding and Improvement Revenue		8/09 at 100.50		AA		980,990
		Bonds, Series 1998, 4.875%, 8/15/23 – MBIA Insured
1,000		Dallas Area Rapid Transit, Texas, Senior Lien Sales Tax Revenue Bonds, Series 2001, 5.000%,		12/11 at 100.00		AAA		1,094,460
		12/01/31 (Pre-refunded 12/01/11) – AMBAC Insured
360		Dallas-Fort Worth International Airport Public Facility Corporation, Texas, Airport Hotel		1/09 at 100.00		AAA		341,244
		Revenue Bonds, Series 2001, 5.500%, 1/15/20 – FSA Insured
2,300		Harris County Health Facilities Development Corporation, Texas, Thermal Utility Revenue Bonds,		11/13 at 100.00		AA		2,065,561
		TECO Project, Series 2003, 5.000%, 11/15/30 – MBIA Insured
1,550		Harris County-Houston Sports Authority, Texas, Junior Lien Revenue Bonds, Series 2001H,		No Opt. Call		AA		268,398
		0.000%, 11/15/30 – MBIA Insured
3,470		Harris County-Houston Sports Authority, Texas, Senior Lien Revenue Refunding Bonds, Series		11/30 at 61.17		AA		321,808
		2001A, 0.000%, 11/15/38 – MBIA Insured
2,805		Harris County-Houston Sports Authority, Texas, Third Lien Revenue Bonds, Series 2004-A3.,		11/24 at 52.47		AA		322,968
		0.000%, 11/15/35 – MBIA Insured
45		Irving Independent School District, Dallas County, Texas, General Obligation Refunding Bonds,		2/12 at 100.00		AAA		40,182
		Series 2002A, 5.000%, 2/15/31
3,455		Irving Independent School District, Dallas County, Texas, General Obligation Refunding Bonds,		2/12 at 100.00		AAA		3,793,003
		Series 2002A, 5.000%, 2/15/31 (Pre-refunded 2/15/12)
1,780		Leander Independent School District, Williamson and Travis Counties, Texas, General Obligation		8/16 at 35.23		AAA		307,477
		Bonds, Series 2007, 0.000%, 8/15/37
465		San Antonio, Texas, Water System Revenue Refunding Bonds, Series 1992, 6.000%, 5/15/16		5/12 at 100.00		AAA		528,612
		(Pre-refunded 5/15/12) – MBIA Insured
1,750		Texas, General Obligation Bonds, Water Financial Assistance Program, Series 2003A, 5.125%,		8/13 at 100.00		Aa1		1,357,703
		8/01/42 (Alternative Minimum Tax)
24,980		Total Texas						15,441,856
		Utah – 0.4%
775		Utah State Building Ownership Authority, Lease Revenue Bonds, State Facilities Master Lease		11/11 at 100.00		AA+		783,998
		Program, Series 2001B, 5.250%, 5/15/24
		Virginia – 0.4%
1,500		Fairfax County Economic Development Authority, Virginia, Residential Care Facilities Mortgage		10/17 at 100.00		N/R		793,605
		Revenue Bonds, Goodwin House, Inc., Series 2007A, 5.125%, 10/01/42
		Washington – 8.2%
250		Energy Northwest, Washington, Electric Revenue Refunding Bonds, Columbia Generating Station –		7/12 at 100.00		Aaa		267,698
		Nuclear Project 2, Series 2002C, 5.500%, 7/01/17 – MBIA Insured
4,750		Snohomish County Public Utility District 1, Washington, Generation System Revenue Bonds,		No Opt. Call		Aaa		5,082,453
		Series 1989, 6.750%, 1/01/12 (ETM)
9,750		Washington State Healthcare Facilities Authority, Revenue Bonds, Sisters of Providence Health		10/11 at 100.00		AA		9,816,982
		System, Series 2001A, 5.125%, 10/01/17 – MBIA Insured
2,245		Washington State Tobacco Settlement Authority, Tobacco Settlement Asset-Backed Revenue Bonds,		6/13 at 100.00		BBB		1,885,082
		Series 2002, 6.500%, 6/01/26
2,115		Washington State, Motor Vehicle Fuel Tax General Obligation Bonds, Series 2003F, 0.000%,		No Opt. Call		AA+		730,436
		12/01/27 – MBIA Insured
19,110		Total Washington						17,782,651
		West Virginia – 0.7%
1,075		Marshall County, West Virginia, Special Obligation Refunding Bonds, Series 1992, 6.500%,		No Opt. Call		AAA		1,125,998
		5/15/10 (ETM)
500		West Virginia Hospital Finance Authority, Revenue Bonds, United Hospital Center Inc. Project,		6/16 at 100.00		AA		350,790
		Series 2006A, 4.500%, 6/01/26 – AMBAC Insured
1,575		Total West Virginia						1,476,788
		Wisconsin – 1.7%
580		Badger Tobacco Asset Securitization Corporation, Wisconsin, Tobacco Settlement Asset-Backed		6/12 at 100.00		BBB		513,132
		Bonds, Series 2002, 6.125%, 6/01/27
1,000		Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Wheaton Franciscan		8/13 at 100.00		BBB+		781,130
		Services Inc., Series 2003A, 5.500%, 8/15/17
2,500		Wisconsin, General Obligation Refunding Bonds, Series 2003-3, 5.000%, 11/01/26		11/13 at 100.00		AA		2,515,825
4,080		Total Wisconsin						3,810,087
$      267,285		Total Municipal Bonds (cost $224,416,028)						214,519,360
Shares		Description (1)						Value
		Common Stocks – 0.0%
		Airlines – 0.0%
789		UAL Corporation, (5)					$	8,695
		Total Common Stocks (cost $0)						8,695
Principal
Amount (000)		Description (1)		Coupon		Maturity		Value
		Short-Term Investments – 0.5%
$         1,069		State Street Euro Dollar Time Deposit		0.010%		1/02/09	$	1,068,927
		Total Short-Term Investments (cost $1,068,927)						1,068,927
		Total Investments (cost $225,484,955) – 98.7%						215,596,982
		Other Assets Less Liabilities – 1.3%						2,747,631
		Net Assets – 100%					$	218,344,613

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(1)		All percentages shown in the Portfolio of Investments are based on net assets.
(2)		Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption.
		There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities
		may be subject to periodic principal paydowns.
(3)		Ratings: Using the higher of Standard & Poor's Group ("Standard & Poor's") or Moody's Investor Service,
		Inc. ("Moody's") rating. Ratings below BBB by Standard & Poor's or Baa by Moody's are considered to be
		below investment grade.
		The Portfolio of Investments may reflect the ratings on certain bonds insured by ACA, AGC, AMBAC, CIFG,
		FGIC, FSA, MBIA, RAAI and SYNCORA as of December 31, 2008. Subsequent to December 31, 2008, and
		during the period this Portfolio of Investments was prepared, there may have been reductions to the
		ratings of certain bonds resulting from changes to the ratings of the underlying insurers both during the
		period and after period end. Such reductions would likely reduce the effective rating of many of the bonds
		insured by that insurer or insurers presented at period end.
(4)		Backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities
		which ensure the timely payment of principal and interest. Such investments are normally considered to
		be equivalent to AAA rated securities.
(5)		On December 9, 2002, UAL Corporation (“UAL”), the holding company of United Air Lines, Inc. (“United”)
		filed for federal bankruptcy protection. The Adviser determined that it was likely that United would not
		remain current on their interest payment obligations with respect to the bonds previously held and thus
		the Fund had stopped accruing interest on its UAL bonds. On February 1, 2006, UAL emerged from federal
		bankruptcy with the acceptance of its reorganization plan by the bankruptcy court. Under the settlement
		agreement established to meet UAL’s unsecured bond obligations, the bondholders, including the Fund,
		received three distributions of UAL common stock over the subsequent months, and the bankruptcy court
		dismissed all unsecured claims of bondholders, including those of the Fund. On May 5, 2006, the Fund
		liquidated such UAL common stock holdings. On September 29, 2006 and May 30, 2007, the Fund received
		additional distributions of 1,901 and 617 shares, respectively, of UAL common stock as a result of its earlier
		ownership of the UAL bonds. The Fund liquidated 1,901 shares of such UAL common stock holdings on
		November 15, 2006. The Fund received an additional distribution of 172 shares on November 14, 2007. The
		remaining 789 shares of UAL common stock were still held by the Fund at December 31, 2008.
N/R		Not rated.
(ETM)		Escrowed to maturity.
(IF)		Inverse floating rate investment.

Fair Value Measurements

During the current fiscal period, the Fund adopted the provisions of Statement of Financial Accounting Standards No. 157 (SFAS No.157) “Fair Value Measurements.” SFAS No. 157 defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and expands disclosure about fair value measurements. In determining the value of the Fund's investments various inputs are used. These inputs are summarized in the three broad levels listed below:

Level 1 – Quoted prices in active markets for identical securities.

Level 2 – Other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

Level 3 – Significant unobservable inputs (including management's assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not an indication of the risk associated with investing in those securities.

The following is a summary of the Fund's fair value measurements as of December 31, 2008:

		Level 1		Level 2		Level 3		Total
Investments		$1,077,622		$214,519,360		$ —		$215,596,982

Income Tax Information

The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to timing differences in recognizing taxable market discount, timing differences in recognizing certain gains and losses on investment transactions and the treatment of investments in inverse floating rate transactions subject to SFAS No. 140. To the extent that differences arise that are permanent in nature, such amounts are reclassified within the capital accounts on the Statement of Assets and Liabilities presented in the annual report, based on their federal tax basis treatment; temporary differences do not require reclassification. Temporary and permanent differences do not impact the net asset value of the Fund.

At December 31, 2008, the cost of investments was $225,215,063.

Gross unrealized appreciation and gross unrealized depreciation of investments at December 31, 2008, were as follows:

Gross unrealized:
Appreciation		$  9,916,646
Depreciation		(19,534,727)
Net unrealized appreciation (depreciation) of investments		$  (9,618,081)

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Item 2. Controls and Procedures.

1. The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
2. There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: See EX-99 CERT attached hereto.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)         Nuveen Select Tax-Free Income Portfolio         

By (Signature and Title)          /s/ Kevin J. McCarthy                    
                                                  Kevin J. McCarthy
                                                  Vice President and Secretary

Date         February 27, 2009        

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)         /s/ Gifford R. Zimmerman                    
                                                 Gifford R. Zimmerman
                                                 Chief Administrative Officer (principal executive officer) 

Date         February 27, 2009        

By (Signature and Title)         /s/ Stephen D. Foy                              
                                                 Stephen D. Foy
                                                 Vice President and Controller (principal financial officer) 

Date        February 27, 2009