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:            03/31          

Date of reporting period:          06/30/05         

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)             
                   June 30, 2005             
 
 
 
Principal        Optional Call        Market 
Amount (000)    Description    Provisions*    Ratings**    Value 
 
    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    $ 1,129,950 
    Education and Civic Organizations - 9.9%             
1,700    Amherst Industrial Development Agency, New York, Revenue Bonds, UBF Faculty/Student Housing    8/12 at 101.00    AAA    1,849,379 
    Corporation, University of Buffalo Creekside Project, Series 2002A, 5.000%, 8/01/22 - AMBAC             
    Insured             
100    New York City Industrial Development Agency, New York, Civic Facility Revenue Bonds, St. Francis    10/14 at 100.00    A-    104,940 
    College, Series 2004, 5.000%, 10/01/34             
500    New York City Industrial Development Agency, New York, Civic Facility Revenue Bonds, YMCA of    2/11 at 100.00    A-    526,010 
    Greater New York, Series 2002, 5.250%, 8/01/21             
570    Dormitory Authority of the State of New York, Second General Resolution Consolidated Revenue Bonds,    No Opt. Call    AAA    637,192 
    City University System, Series 1990C, 7.500%, 7/01/10 - FGIC Insured             
1,425    Dormitory Authority of the State of New York, Insured Revenue Bonds, Rochester Institute of    7/07 at 101.00    AAA    1,494,041 
    Technology, Series 1997, 5.250%, 7/01/22 - MBIA Insured             
785    Dormitory Authority of the State of New York, Insured Revenue Bonds, Iona College, Series 2002,    7/12 at 100.00    AAA    829,831 
    5.000%, 7/01/22 - XLCA Insured             
200    Puerto Rico Industrial, Tourist, Educational, Medical and Environmental Control Facilities    2/09 at 101.00    BBB    207,972 
    Financing Authority, Higher Education Revenue Bonds, Ana G. Mendez University System, Series 1999,             
    5.375%, 2/01/19             
    Healthcare - 11.4%             
750    New York City Health and Hospitals Corporation, New York, Health System Revenue Bonds, Series    2/13 at 100.00    AAA    825,023 
    2003A, 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    256,340 
    University Hospital, Series 2002C, 6.450%, 7/01/32             
250    Dormitory Authority of the State of New York, FHA-Insured Mortgage Revenue Bonds, Montefiore    2/15 at 100.00    AAA    267,985 
    Hospital, Series 2004, 5.000%, 8/01/29 - FGIC Insured             
415    Dormitory Authority of the State of New York, Revenue Bonds, New York and Presbyterian Hospital,    8/14 at 100.00    AAA    464,074 
    Series 2004A, 5.250%, 8/15/15 - FSA Insured             
500    Dormitory Authority of the State of New York, Revenue Bonds, Winthrop-South Nassau University    7/13 at 100.00    Baa1    529,670 
    Hospital Association, Series 2003A, 5.500%, 7/01/32             
670    Dormitory Authority of the State of New York, Revenue Bonds, Memorial Sloan-Kettering Cancer    7/13 at 100.00    AAA    723,211 
    Center, Series 2003-1, 5.000%, 7/01/21 - MBIA Insured             
250    Dormitory Authority of the State of New York, Revenue Bonds, North Shore Long Island Jewish Group,    5/13 at 100.00    A3    266,420 
    Series 2003, 5.375%, 5/01/23             
1,680    Dormitory Authority of the State of New York, Revenue Bonds, Winthrop-South Nassau University    7/11 at 101.00    AAA    1,837,718 
    Health 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    7/11 at 101.00    AAA    1,307,187 
    Health System Obligated Group, Series 2001B, 5.250%, 7/01/17 - AMBAC Insured             
    Housing/Multifamily - 5.1%             
1,000    East Rochester Housing Authority, New York, Revenue Bonds, GNMA/FHA Secured Revenue Bonds, St.    12/12 at 103.00    AAA    1,087,230 
    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    1,071,290 
    Woods Apartments II Project, Series 2002, 5.350%, 2/01/20             
775    New York State Housing Finance Agency, FHA-Insured Mortgage Multifamily Housing Revenue Bonds,    8/05 at 100.00    AAA    776,318 
    Series 1992C, 6.450%, 8/15/14 - MBIA Insured             
    Housing/Single Family - 8.1%             
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    2,572,500 
    (Alternative Minimum Tax)             
2,000    New York State Mortgage Agency, Homeowner Mortgage Revenue Bonds, Series 101, 5.000%, 10/01/18    10/11 at 100.00    Aa1    2,053,280 
    (Alternative Minimum Tax)             
    Long-Term Care - 9.3%             
2,000    East Rochester Housing Authority, New York, FHA-Insured Mortgage Revenue Refunding Bonds, Jewish    8/12 at 101.00    AAA    2,110,940 
    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+    1,047,190 
    Eger Harbor House Inc. Project, Series 2002A, 4.950%, 11/20/32             
2,000    Dormitory Authority of the State of New York, FHA-Insured Nursing Home Mortgage Revenue Bonds,    8/11 at 101.00    AAA    2,126,660 
    Norwegian Christian Home and Health Center, Series 2001, 5.200%, 8/01/36 - MBIA Insured             
    Tax Obligation/General - 6.1%             
    Clarkstown, Rickland County, New York, Various Purposes Serial Bonds, Series 1992:             
505    5.600%, 6/15/10 - AMBAC Insured    No Opt. Call    AAA    563,540 
525    5.600%, 6/15/11 - AMBAC Insured    No Opt. Call    AAA    593,397 
525    5.600%, 6/15/12 - AMBAC Insured    No Opt. Call    AAA    602,962 
750    New York City, New York, General Obligation Bonds, Fiscal Series 2004I, 5.000%, 8/01/17 - MBIA    8/14 at 100.00    AAA    824,933 
    Insured             
225    New York City, New York, General Obligation Bonds, Fiscal Series 2004B, 5.250%, 8/01/15    8/14 at 100.00    A+    249,917 
300    New York City, New York, General Obligation Bonds, Fiscal Series 2004C, 5.250%, 8/15/16    8/14 at 100.00    A+    331,923 
285    West Islip Union Free School District, Suffolk County, New York, General Obligation Bonds, Series    No Opt. Call    Aaa    318,884 
    2005, 5.000%, 10/01/14 - FSA Insured             
    Tax Obligation/Limited - 15.2%             
600    Battery Park City Authority, New York, Senior Revenue Bonds, Series 2003A, 5.000%, 11/01/23    11/13 at 100.00    AAA    649,794 
500    Erie County Industrial Development Agency, New York, School Facility Revenue Bonds, Buffalo City    5/14 at 100.00    AAA    575,610 
    School District, Series 2004, 5.750%, 5/01/26 - FSA Insured             
500    Metropolitan Transportation Authority, New York, State Service Contract Refunding Bonds, Series    7/12 at 100.00    AAA    557,035 
    2002A, 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    98,633 
    5.125%, 11/15/21 - AMBAC Insured             
670    New York City Transitional Finance Authority, New York, Future Tax Secured Bonds, Fiscal Series    2/13 at 100.00    AAA    712,766 
    2003E, 5.000%, 2/01/23             
    Dormitory Authority of the State of New York, Revenue Bonds, Mental Health Services Facilities             
    Improvements, Series 2005D:             
175    5.000%, 2/15/14 - FGIC Insured    No Opt. Call    AAA    193,979 
320    5.000%, 8/15/14 - FGIC Insured    No Opt. Call    AAA    355,885 
50    New York State Thruway Authority, Highway and Bridge Trust Fund Bonds, Series 1995A, 5.125%,    4/07 at 100.00    AAA    51,094 
    4/01/15 - MBIA Insured             
750    New York State Thruway Authority, Highway and Bridge Trust Fund Bonds, Second General, Series    4/13 at 100.00    AAA    828,750 
    2003A, 5.250%, 4/01/23 - MBIA Insured             
250    New York State Thruway Authority, Highway and Bridge Trust Fund Bonds, Second General, Series 2004,    4/14 at 100.00    AAA    270,308 
    5.000%, 4/01/21 - MBIA 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    269,933 
200    5.000%, 10/15/26 - MBIA Insured    10/14 at 100.00    AAA    216,270 
1,225    5.000%, 10/15/29 - AMBAC Insured    10/14 at 100.00    AAA    1,322,669 
    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    1,100,130 
250    5.250%, 6/01/21 - AMBAC Insured    6/13 at 100.00    AAA    274,135 
500    New York State Tobacco Settlement Financing Corporation, Tobacco Settlement Asset-Backed and State    6/13 at 100.00    AA-    554,580 
    Contingency Contract-Backed Bonds, Series 2003B-1C, 5.500%, 6/01/21             
75    Triborough Bridge and Tunnel Authority, New York, Convention Center Bonds, Series 1990E, 7.250%,    No Opt. Call    AA-    82,982 
    1/01/10             
500    Yonkers Industrial Development Agency, New York, Revenue Bonds, Community Development Properties -    2/11 at 100.00    BBB-    548,200 
    Yonkers Inc. Project, Series 2001A, 6.250%, 2/01/16             
    Transportation - 2.4%             
400    Albany Parking Authority, New York, Revenue Bonds, Series 2001A, 5.625%, 7/15/25    7/11 at 101.00    BBB+    431,352 
500    Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Series 2003A,    No Opt. Call    AAA    561,520 
    5.000%, 11/15/15 - FGIC Insured             
375    Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Series 2005B,    11/15 at 100.00    AAA    404,093 
    5.000%, 11/15/35 (WI, settling 7/01/05) - MBIA Insured             
    U.S. Guaranteed *** - 10.6%             
1,365    Dormitory Authority of the State of New York, Judicial Facilities Lease Revenue Bonds, Suffolk    No Opt. Call    AAA    1,667,075 
    County Issue, Series 1986, 7.375%, 7/01/16             
1,430    Dormitory Authority of the State of New York, Revenue Bonds, Upstate Community Colleges, Series    7/11 at 101.00    AA-***    1,591,747 
    2002A, 5.000%, 7/01/23 (Pre-refunded to 7/01/11)             
1,000    New York State Urban Development Corporation, State Personal Income Tax Revenue Bonds, State    3/13 at 100.00    AAA    1,147,940 
    Facilities and Equipment, Series 2002C-1, 5.500%, 3/15/21 (Pre-refunded to 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    558,798 
1,000    West Islip Union Free School District, Suffolk County, New York, General Obligation Bonds, Series    10/10 at 100.00    Aaa    1,096,740 
    2001, 5.000%, 10/01/17 (Pre-refunded to 10/01/10) - FSA Insured             
 
    Utilities - 7.1%             
2,000    Long Island Power Authority, New York, Electric System General Revenue Bonds, Series 1998A,    6/08 at 101.00    AAA    2,113,760 
    5.125%, 12/01/22 - FSA Insured             
1,000    Long Island Power Authority, New York, Electric System General Revenue Bonds, Series 2003C,    9/13 at 100.00    AAA    1,089,780 
    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    510,625 
    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    11/11 at 101.00    Baa3    270,318 
    Bonds, American Ref-Fuel Company of Niagara LP, Series 2001A, 5.450%, 11/15/26 (Alternative             
    Minimum Tax) (Mandatory put 11/15/12)             
60    Westchester County Industrial Development Agency, Westchester County, New York, Resource Recovery    7/07 at 101.00    BBB    62,359 
    Revenue Bonds, RESCO Company, Series 1996, 5.500%, 7/01/09 (Alternative Minimum Tax)             
 
    Water and Sewer - 12.3%             
2,500    New York City Municipal Water Finance Authority, New York, Water and Sewerage System Revenue Bonds,    6/11 at 101.00    AA+    2,649,850 
    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    2,213,820 
2,000    5.000%, 6/15/27    6/12 at 100.00    AAA    2,126,020 
$ 52,485    Total Long-Term Investments (cost $53,449,281) - 99.5%            56,746,457 
    Other Assets Less Liabilities - 0.5%            296,359 
    Net Assets - 100%            $57,042,816 
 
 
*    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.             
**    Ratings: Using the higher of Standard & Poor's or Moody's rating.             
***    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.             
(WI)    Security purchased on a when-issued basis.             
    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 income on taxable market             
    discount securities and timing differences in recognizing certain gains and losses on investment transactions.             
    At June 30, 2005, the cost of investments was $53,445,085.             
    Gross unrealized appreciation and gross unrealized depreciation of investments at June 30, 2005, were as             
    follows:             
    Gross unrealized:             
       Appreciation            $3,307,323 
       Depreciation            (5,951) 
 
    Net unrealized appreciation of investments            $3,301,372 

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--Vice President and Secretary        

Date         08/26/05        

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--Chief Administrative Officer (principal executive officer)        

Date         08/26/05        

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

Date         08/26/05        

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