Form N-Q

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         811-6624         

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


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


Jessica R. Droeger—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:            3/31          

Date of reporting period:          12/31/05         

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 New York Select Tax-Free Income Portfolio (NXN)
December 31, 2005

Principal    Optional Call     
Amount (000)  Description  Provisions(1)  Ratings(2)  Value 
  Consumer Discretionary - 0.2%       
$ 100  New York City Industrial Development Agency, New York, Liberty Revenue Bonds, IAC/InterActiveCorp,  9/15 at 100.00  BBB-  $ 99,107 
  Series 2005, 5.000%, 9/01/35       
  Consumer Staples - 2.0%       
1,080  TSASC Inc., New York, Tobacco Asset-Backed Bonds, Series 2002-1, 5.500%, 7/15/24  7/12 at 100.00  BBB  1,106,460 
  Education and Civic Organizations - 9.2%       
1,700  Amherst Industrial Development Agency, New York, Revenue Bonds, UBF Faculty/Student Housing Corporation,  8/12 at 101.00  AAA  1,808,970 
  University of Buffalo Creekside Project, Series 2002A, 5.000%, 8/01/22 - AMBAC Insured       
785  Dormitory Authority of the State of New York, Insured Revenue Bonds, Iona College, Series 2002, 5.000%,  7/12 at 100.00  AAA  817,915 
  7/01/22 - XLCA Insured       
1,000  Dormitory Authority of the State of New York, Insured Revenue Bonds, Rochester Institute of Technology,  7/07 at 101.00  AAA  1,037,810 
  Series 1997, 5.250%, 7/01/22 - MBIA Insured       
490  Dormitory Authority of the State of New York, Second General Resolution Consolidated Revenue Bonds,  No Opt. Call  AAA  540,735 
  City University System, Series 1990C, 7.500%, 7/01/10 - FGIC Insured       
100  Hempstead Town Industrial Development Agency, New York, Revenue Bonds, Adelphi University, Civic Facility  10/15 at 100.00  A-  103,148 
   Project, Series 2005, 5.000%, 10/01/35       
100  New York City Industrial Development Agency, New York, Civic Facility Revenue Bonds, St. Francis College,  10/14 at 100.00  A-  102,450 
  Series 2004, 5.000%, 10/01/34       
500  New York City Industrial Development Agency, New York, Civic Facility Revenue Bonds, YMCA of Greater  2/11 at 100.00  A-  518,815 
  New York, Series 2002, 5.250%, 8/01/21       
200  Puerto Rico Industrial, Tourist, Educational, Medical and Environmental Control Facilities Financing Authority,  2/09 at 101.00  BBB-  205,386 
  Higher Education Revenue Bonds, Ana G. Mendez University System, Series 1999, 5.375%, 2/01/19       
4,875  Total Education and Civic Organizations      5,135,229 
  Health Care - 11.7%       
250  Dormitory Authority of the State of New York, FHA-Insured Mortgage Revenue Bonds, Montefiore Hospital,  2/15 at 100.00  AAA  261,792 
  Series 2004, 5.000%, 8/01/29 - FGIC Insured       
  Dormitory Authority of the State of New York, Revenue Bonds, Lenox Hill Hospital Obligated Group,       
  Series 2001:       
110  5.375%, 7/01/20  7/11 at 101.00  Ba2  111,111 
100  5.500%, 7/01/30  7/11 at 101.00  Ba2  100,189 
670  Dormitory Authority of the State of New York, Revenue Bonds, Memorial Sloan-Kettering Cancer Center,  7/13 at 100.00  AAA  711,855 
  Series 2003-1, 5.000%, 7/01/21 - MBIA Insured       
415  Dormitory Authority of the State of New York, Revenue Bonds, New York and Presbyterian Hospital,  8/14 at 100.00  AAA  452,603 
  Series 2004A, 5.250%, 8/15/15 - FSA Insured       
250  Dormitory Authority of the State of New York, Revenue Bonds, North Shore Long Island Jewish Group,  5/13 at 100.00  A3  262,170 
  Series 2003, 5.375%, 5/01/23       
1,680  Dormitory Authority of the State of New York, Revenue Bonds, Winthrop South Nassau University Health  7/11 at 101.00  AAA  1,797,600 
  System Obligated Group, Series 2001A, 5.250%, 7/01/17 - AMBAC Insured       
1,195  Dormitory Authority of the State of New York, Revenue Bonds, Winthrop South Nassau University Health  7/11 at 101.00  AAA  1,278,650 
  System Obligated Group, Series 2001B, 5.250%, 7/01/17 - AMBAC Insured       
500  Dormitory Authority of the State of New York, Revenue Bonds, Winthrop-South Nassau University Hospital  7/13 at 100.00  Baa1  521,675 
  Association, Series 2003A, 5.500%, 7/01/32       
750  New York City Health and Hospitals Corporation, New York, Health System Revenue Bonds, Series 2003A,  2/13 at 100.00  AAA  810,000 
  5.250%, 2/15/21 - AMBAC Insured       
250  New York City Industrial Development Agency, New York, Civic Facility Revenue Bonds, Staten Island  7/12 at 101.00  B2  257,742 
  University Hospital, Series 2002C, 6.450%, 7/01/32       
6,170  Total Health Care      6,565,387 
  Housing/Multifamily - 5.3%       
1,000  East Rochester Housing Authority, New York, Revenue Bonds, GNMA/FHA-Secured Revenue Bonds,  12/12 at 103.00  AAA  1,076,330 
  St. Mary's Residence Project, Series 2002A, 5.375%, 12/20/22       
1,000  New Hartford-Sunset Woods Funding Corporation, New York, FHA-Insured Mortgage Revenue Bonds, Sunset  8/12 at 101.00  AAA  1,062,810 
  Woods Apartments II Project, Series 2002, 5.350%, 2/01/20       
250  New York City Housing Development Corporation, New York, Multifamily Housing Revenue Bonds,  5/14 at 100.00  AA  262,190 
  Series 2004A, 5.250%, 11/01/30       
160  New York City Housing Development Corporation, New York, Multifamily Housing Revenue Bonds,  11/15 at 100.00  AA  161,117 
  Series 2005F-1, 4.750%, 11/01/35       
380  New York State Housing Finance Agency, FHA-Insured Multifamily Housing Mortgage Revenue Bonds,  2/06 at 100.00  AAA  380,597 
  Series 1992C, 6.450%, 8/15/14 - MBIA Insured       
2,790  Total Housing/Multifamily      2,943,044 
  Housing/Single Family - 8.2%       
2,000  New York State Mortgage Agency, Homeowner Mortgage Revenue Bonds, Series 101, 5.000%, 10/01/18  10/11 at 100.00  Aa1  2,043,440 
  (Alternative Minimum Tax)       
2,500  New York State Mortgage Agency, Mortgage Revenue Bonds, Thirty-First Series A, 5.300%, 10/01/31  4/11 at 100.00  Aaa  2,552,924 
  (Alternative Minimum Tax)       
4,500  Total Housing/Single Family      4,596,364 
  Long-Term Care - 9.4%       
2,000  Dormitory Authority of the State of New York, FHA-Insured Nursing Home Mortgage Revenue Bonds,  8/11 at 101.00  AAA  2,094,899 
  Norwegian Christian Home and Health Center, Series 2001, 5.200%, 8/01/36 - MBIA Insured       
50  Dormitory Authority of the State of New York, Revenue Bonds, Providence Rest, Series 2005, 5.000%,  7/15 at 100.00  A  51,001 
  7/01/35 - ACA Insured       
2,000  East Rochester Housing Authority, New York, FHA-Insured Mortgage Revenue Refunding Bonds, Jewish  8/12 at 101.00  AAA  2,074,820 
  Home of Rochester, Series 2002, 4.625%, 2/15/17       
1,000  New York City Industrial Development Agency, New York, GNMA Collateralized Mortgage Revenue Bonds,  11/12 at 101.00  AA+  1,028,120 
  Eger Harbor House Inc., Series 2002A, 4.950%, 11/20/32       
5,050  Total-Long Term Care      5,248,840 
  Tax Obligation/General - 6.0%       
  Clarkstown, Rickland County, New York, Various Purposes Serial Bonds, Series 1992:       
505  5.600%, 6/15/10 - AMBAC Insured  No Opt. Call  AAA  549,895 
525  5.600%, 6/15/11 - AMBAC Insured  No Opt. Call  AAA  578,765 
525  5.600%, 6/15/12 - AMBAC Insured  No Opt. Call  AAA  588,163 
300  New York City, New York, General Obligation Bonds, Fiscal Series 2004C, 5.250%, 8/15/16  8/14 at 100.00  A+  324,498 
500  New York City, New York, General Obligation Bonds, Fiscal Series 2004E, 5.000%, 11/01/19 - FSA Insured  11/14 at 100.00  AAA  532,855 
225  New York City, New York, General Obligation Bonds, Fiscal Series 2006C, 5.000%, 8/01/16 - FSA Insured  8/15 at 100.00  AAA  243,227 
500  West Islip Union Free School District, Suffolk County, New York, General Obligation Bonds,  10/15 at 100.00  Aaa  544,025 
  Series 2005, 5.000%, 10/01/16 - FSA Insured       
3,080  Total Tax Obligation/General      3,361,428 
  Tax Obligation/Limited - 13.9%       
600  Battery Park City Authority, New York, Senior Revenue Bonds, Series 2003A, 5.000%, 11/01/23  11/13 at 100.00  AAA  635,436 
175  Dormitory Authority of the State of New York, Revenue Bonds, Mental Health Services Facilities Improvements,  No Opt. Call  AAA  189,656 
  Series 2005D, 5.000%, 2/15/14 - FGIC Insured       
300  Dormitory Authority of the State of New York, Revenue Bonds, Mental Health Services Facilities Improvements,  No Opt. Call  AAA  325,962 
  Series 2005D-1, 5.000%, 2/15/15 - FGIC Insured       
500  Erie County Industrial Development Agency, New York, School Facility Revenue Bonds, Buffalo City School  5/14 at 100.00  AAA  564,125 
  District, Series 2004, 5.750%, 5/01/26 - FSA Insured       
500  Metropolitan Transportation Authority, New York, State Service Contract Refunding Bonds, Series 2002A,  7/12 at 100.00  AAA  546,160 
  5.500%, 1/01/20 - MBIA Insured       
95  Nassau County Interim Finance Authority, New York, Sales Tax Secured Revenue Bonds, Series 2001A-2,  11/06 at 101.00  AAA  97,556 
  5.125%, 11/15/21 - AMBAC Insured       
  New York City Sales Tax Asset Receivable Corporation, New York, Dedicated Revenue Bonds, Local       
  Government Assistance Corporation, Series 2004A:       
250  5.000%, 10/15/25 - MBIA Insured  10/14 at 100.00  AAA  265,033 
200  5.000%, 10/15/26 - MBIA Insured  10/14 at 100.00  AAA  211,874 
1,225  5.000%, 10/15/29 - AMBAC Insured  10/14 at 100.00  AAA  1,291,273 
670  New York City Transitional Finance Authority, New York, Future Tax Secured Bonds, Fiscal Series 2003E,  2/13 at 100.00  AAA  701,905 
  5.000%, 2/01/23       
250  New York State Thruway Authority, Highway and Bridge Trust Fund Bonds, Second Generation, Series 2004,  4/14 at 100.00  AAA  265,335 
  5.000%, 4/01/21 - MBIA Insured       
570  New York State Thruway Authority, Highway and Bridge Trust Fund Bonds, Second Generation, Series 2005B,  No Opt. Call  AAA  659,804 
  5.500%, 4/01/20 - AMBAC Insured       
  New York State Tobacco Settlement Financing Corporation, Tobacco Settlement Asset-Backed and State       
  Contingency Contract-Backed Bonds, Series 2003A-1:       
1,000  5.250%, 6/01/20 - AMBAC Insured  6/13 at 100.00  AAA  1,077,870 
250  5.250%, 6/01/21 - AMBAC Insured  6/13 at 100.00  AAA  268,803 
500  New York State Tobacco Settlement Financing Corporation, Tobacco Settlement Asset-Backed and State  6/13 at 100.00  AA-  545,540 
  Contingency Contract-Backed Bonds, Series 2003B-1C, 5.500%, 6/01/21       
60  Triborough Bridge and Tunnel Authority, New York, Convention Center Bonds, Series 1990E, 7.250%, 1/01/10  No Opt. Call  AA-  64,712 
7,145  Total Tax Obligation/Limited      7,711,044 
  Transportation - 3.8%       
400  Albany Parking Authority, New York, Revenue Bonds, Series 2001A, 5.625%, 7/15/25  7/11 at 101.00  BBB+  426,492 
500  Metropolitan Transportation Authority, New York, Transportation Revenue Bonds,  No Opt. Call  AAA  546,755 
  Series 2003A, 5.000%, 11/15/15 - FGIC Insured       
50  New York State Thruway Authority, General Revenue Bonds, Series 2005F, 5.000%, 1/01/30 - AMBAC Insured  1/15 at 100.00  AAA  52,495 
  New York State Thruway Authority, General Revenue Bonds, Series 2005G:       
100  5.000%, 1/01/30 - FSA Insured  7/15 at 100.00  AAA  105,533 
600  5.000%, 1/01/32 - FSA Insured  7/15 at 100.00  AAA  631,764 
  Port Authority of New York and New Jersey, Consolidated Revenue Bonds, One Hundred Fortieth Series 2005:       
250  5.000%, 12/01/19 - FSA Insured  6/15 at 101.00  AAA  270,253 
105  5.000%, 12/01/31 - XLCA Insured  6/15 at 101.00  AAA  110,219 
2,005  Total Transportation      2,143,511 
  U.S. Guaranteed(3) - 10.0%       
1,305  Dormitory Authority of the State of New York, Judicial Facilities Lease Revenue Bonds, Suffolk County Issue,  No Opt. Call  AAA  1,576,675 
  Series 1986, 7.375%, 7/01/16       
1,430  Dormitory Authority of the State of New York, Revenue Bonds, Upstate Community Colleges,  7/11 at 101.00  AA-(3)  1,550,206 
  Series 2002A, 5.000%, 7/01/23 (Pre-refunded 7/01/11)       
750  New York State Thruway Authority, Highway and Bridge Trust Fund Bonds, Second Generation,  4/13 at 100.00  AAA  827,580 
  Series 2003A, 5.250%, 4/01/23 (Pre-refunded 4/01/13) - MBIA Insured       
1,000  New York State Urban Development Corporation, State Personal Income Tax Revenue Bonds, State  3/13 at 100.00  AAA  1,118,890 
  Facilities and Equipment, Series 2002C-1, 5.500%, 3/15/21 (Pre-refunded 3/15/13) - FGIC Insured       
485  Suffolk County Water Authority, New York, Water Revenue Bonds, Series 1986V, 6.750%, 6/01/12  No Opt. Call  AAA  543,171 
4,970  Total U.S. Guaranteed      5,616,522 
  Utilities - 7.2%       
2,000  Long Island Power Authority, New York, Electric System General Revenue Bonds,  6/08 at 101.00  AAA  2,095,959 
  Series 1998A, 5.125%, 12/01/22 - FSA Insured       
1,000  Long Island Power Authority, New York, Electric System General Revenue Bonds,  9/13 at 100.00  AAA  1,071,920 
  Series 2003C, 5.000%, 9/01/16 - CIFG Insured       
500  New York State Energy Research and Development Authority, Pollution Control Revenue Bonds, New York  3/08 at 101.50  AAA  502,935 
  State Electric and Gas Corporation, Series 2005A, 4.100%, 3/15/15 - MBIA Insured       
250  Niagara County Industrial Development Agency, New York, Solid Waste Disposal Facility Revenue Bonds,  11/11 at 101.00  Baa3  263,473 
  American Ref-Fuel Company of Niagara LP, Series 2001A, 5.450%,       
  11/15/26 (Mandatory put 11/15/12) (Alternative Minimum Tax)       
60  Westchester County Industrial Development Agency, Westchester County, New York, Resource Recovery  7/07 at 101.00  BBB  61,777 
  Revenue Bonds, RESCO Company, Series 1996, 5.500%, 7/01/09 (Alternative Minimum Tax)       
3,810  Total Utilities      3,996,064 
  Water and Sewer - 12.2%       
2,500  New York City Municipal Water Finance Authority, New York, Water and Sewerage System Revenue Bonds,  6/11 at 101.00  AA+  2,591,074 
  Fiscal Series 2001C, 5.125%, 6/15/33       
  New York State Environmental Facilities Corporation, State Clean Water and Drinking Water Revolving Funds       
  Revenue Bonds, New York City Municipal Water Finance Authority Loan, Series 2002B:       
2,000  5.250%, 6/15/19  6/12 at 100.00  AAA  2,160,499 
2,000  5.000%, 6/15/27  6/12 at 100.00  AAA  2,084,480 
6,500  Total Water and Sewer      6,836,053 
$ 52,075  Total Investments (cost $53,045,426) - 99.1%      55,359,053 
  Other Assets Less Liabilities - 0.9%      529,669 
  Net Assets - 100%      $ 55,888,722 
 

(1) 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.
 
(2) Ratings: Using the higher of Standard & Poor’s or Moody’s rating. Ratings below Baa by Moody’s Investor Service, Inc. or BBB by Standard & Poor’s Group are considered to be below investment grade.
 
(3)     Securities are backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities which ensures the timely payment of principal and interest. Such securities are normally considered to be equivalent to AAA rated securities.
 

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 and timing differences in recognizing certain gains and losses on investment transactions.

At December 31, 2005, the cost of investments was $53,040,850.

Gross unrealized appreciation and gross unrealized depreciation of investments at December 31, 2005, were as follows:

Gross unrealized:   
    Appreciation  $ 2,338,222  
    Depreciation  (20,019 ) 
Net unrealized appreciation (depreciation) of investments  $ 2,318,203  

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: 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 New York Select Tax-Free Income Portfolio        

By (Signature and Title)*          /s/ Jessica R. Droeger                     
                                                    Jessica R. Droeger
                                                    Vice President and Secretary

Date         2/27/06        

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         2/27/06        

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

Date         2/27/06        

* Print the name and title of each signing officer under his or her signature.