Unknown & Unclassified nonprofits in New York

Unknown & Unclassified nonprofits in New York. Browse 31,594 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.

Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.

Nonprofit profiles

  1. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 161103957 · Headquarters: williamsville, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 166073770 · Headquarters: Binghamton, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 226091067 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 462183534 · Headquarters: Troy, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 911895153 · Headquarters: Farmingdale, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Sigma Phi Epsilon Fraternity Inc

    EIN 943178351 · Headquarters: Rochester, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Sigma Phi Epsilon NY Delta Chapter

    EIN 141339250 · Headquarters: Troy, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  8. Sigma Phi Gamma International Sorority Inc

    EIN 166051909 · Headquarters: Tonawanda, NY, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  9. Sigma Phi Gamma International Sorority Inc

    EIN 166052234 · Headquarters: Grand Island, NY, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  10. Sigma Phi Gamma International Sorority Inc

    EIN 166063856 · Headquarters: Buffalo, NY, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  11. Sigma Phi Gamma International Sorority Inc

    EIN 204950797 · Headquarters: Kenmore, NY, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  12. Sigma Phi Omega National Honor Society

    EIN 431577308 · Headquarters: Ithaca, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Sigma Pi - Mu Chapter

    EIN 150448140 · Headquarters: ITHACA, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Sigma Pi Fraternity International Inc

    EIN 465303141 · Headquarters: Queens, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Sigma Pi Fraternity Intl Mu Chapter Cornell Alumni Association Inc

    EIN 334194603 · Headquarters: ITHACA, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Sigma Psi Zeta Sorority Incorporated

    EIN 464452521 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  17. Sigma Sigma Sigma

    EIN 465047025 · Headquarters: Huntington Station, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  18. SIGMA TAU GAMMA FRATERNITY Epsilon Pi Chapter

    EIN 205844537 · Headquarters: Buffalo, NY, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  19. Sigma Tau Teke

    EIN 203190902 · Headquarters: lima, NY, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  20. Sigma Theta International Kappa Gamma Chapter

    EIN 311246728 · Headquarters: Stony Brook, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  21. Sigma Theta Tau Inc

    EIN 112552044 · Headquarters: Rockville Centre, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Sigma Theta Tau Inc

    EIN 136185752 · Headquarters: New York, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  23. Sigma Theta Tau Inc

    EIN 136185767 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  24. Sigma Theta Tau Inc

    EIN 141588907 · Headquarters: Plattsburgh, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Sigma Theta Tau Inc

    EIN 166071495 · Headquarters: Dewitt, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Sigma Theta Tau Inc

    EIN 311030877 · Headquarters: STATEN ISLAND, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  27. Sigma Theta Tau Inc

    EIN 311042667 · Headquarters: Rochester, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Sigma Theta Tau Inc

    EIN 311042696 · Headquarters: Binghamton, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Sigma Theta Tau Inc

    EIN 311042709 · Headquarters: Buffalo, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Sigma Theta Tau Inc

    EIN 311309953 · Headquarters: Newburgh, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  31. Sigma Theta Tau Inc

    EIN 363314870 · Headquarters: Bronx, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Sigma Theta Tau Inc

    EIN 363478865 · Headquarters: Utica, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Sigma Theta Tau Inc

    EIN 510232359 · Headquarters: Niagara University, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Sigma Theta Tau Inc

    EIN 621092035 · Headquarters: Troy, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  35. Sigma Theta Tau Inc

    EIN 621092037 · Headquarters: Rochester, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Sigma Theta Tau International Alpha Omega Chapter

    EIN 237111293 · Headquarters: Williston Park, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  37. Sigma Theta Tau International Inc

    EIN 237111292 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Sigma Theta Tau International Inc

    EIN 311361603 · Headquarters: Staten Island, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Sigma Theta Tau International Inc

    EIN 510232361 · Headquarters: Buffalo, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Sigma Theta Tau International Inc

    EIN 621092021 · Headquarters: Bronx, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Sigma Theta Tau International Inc

    EIN 883841307 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Sigma Theta Tau International Inc

    EIN 900266169 · Headquarters: Rochester, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Sigma Theta Tau International Inc

    EIN 901029447 · Headquarters: Farmingdale, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Sigma Theta Tau International Inc

    EIN 911935301 · Headquarters: Amherst, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Sigma Theta Tau International Inc

    EIN 911935302 · Headquarters: Brockport, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  46. Sigma Theta Tau International Inc

    EIN 911935318 · Headquarters: ONEONTA, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Sigma Theta Tau International Inc

    EIN 911935319 · Headquarters: Slingerlands, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Sigma Theta Tau International Inc

    EIN 912039514 · Headquarters: Rochester, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Sigma Theta Tau International Inc

    EIN 912039525 · Headquarters: Elmira, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Sigma Xi Alpha Chapter

    EIN 364656079 · Headquarters: Ithaca, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  51. Sigma Xi-lehman College Chapter

    EIN 800374129 · Headquarters: Broxn, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Sigmund Freud Archives Inc Co W Craig Tomlinson Md Pc

    EIN 131820180 · Headquarters: NEW YORK, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Signature Pink-the Long Island Fashion Doll Club

    EIN 134082156 · Headquarters: Wantagh, NY, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  54. Signature Premier Properties Cares Inc

    EIN 335038360 · Headquarters: Northport, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Signature Society Incorporated

    EIN 933865355 · Headquarters: Mount Vernon, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Sikh Foundation of Syracuse

    EIN 161449621 · Headquarters: Liverpool, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  57. Silberstein Foundation C/o Richard Kadin

    EIN 136101149 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  58. Silver Creek Overseas Veterans Association Inc

    EIN 160724892 · Headquarters: Silver Creek, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  59. Silver Lake Association Inc

    EIN 800953902 · Headquarters: Silver Lake, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Silver Mount Cemetery Association

    EIN 135579013 · Headquarters: STATEN ISLAND, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  61. Silver Palace Dining Room Independent Health Welfare Fund

    EIN 133203369 · Headquarters: NEW YORK, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Silver Warriors Basketball Association Inc

    EIN 461427814 · Headquarters: Niskayuna, NY, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  63. Silver Wings International Inc

    EIN 742567027 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  64. Silverberg Family Foundation Inc

    EIN 113228373 · Headquarters: ARDSLEY, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  65. Silverweed Foundation Inc

    EIN 133496446 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  66. Sim Shuloim Foundation

    EIN 842816841 · Headquarters: MONROE, NY, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  67. Simcha Foundation Inc C/o Gail Kramer

    EIN 133118381 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  68. Simcha Mit Simcha Foundations Inc

    EIN 851558440 · Headquarters: BROOKLYN, NY, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  69. Simon & Marie Jaglom Foundation Inc

    EIN 136105676 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  70. Simon and Annie Davis Foundation

    EIN 136069454 · Headquarters: RYE, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  71. Simon and Eve Colin Foundation

    EIN 112676434 · Headquarters: MANHASSET, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  72. Sinclairville Free Library

    EIN 222521113 · Headquarters: Sinclairville, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  73. Sing Sing Lts Local2951

    EIN 471169144 · Headquarters: Ossining, NY, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  74. Singers Performers Actors Repertory Ensemble Productions Incorporated

    EIN 465553724 · Headquarters: Vestal, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  75. Singh Foundation Inc

    EIN 133719319 · Headquarters: New York, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  76. Single Issue Inc

    EIN 831284803 · Headquarters: Buffalo, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Single Mothers by Choice Inc

    EIN 112664913 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  78. Single Mothers Surviving by Grace Inc

    EIN 462132356 · Headquarters: Brooklyn, NY, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  79. Sino-american Business Association Corp

    EIN 412041076 · Headquarters: Flushing, NY, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  80. Sino-american Photographers Association Inc

    EIN 812832817 · Headquarters: WEST BABYLON, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Sino-american Population Health Management Association

    EIN 834067349 · Headquarters: Millwood, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Sinohope Fundation Inc

    EIN 813214547 · Headquarters: Flushing, NY, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  83. Sipag-ny Corp

    EIN 472090745 · Headquarters: Staten Island, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Siriram Family Foundation Inc

    EIN 333121658 · Headquarters: NEW YORK, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Sister Cecilia Schneider Community Housing Development Fund Corp

    EIN 133578717 · Headquarters: STATEN ISLAND, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Sister Cities Association of Corning New York Inc

    EIN 161310323 · Headquarters: Corning, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Sister City Committee of Glens Falls and Warren County Ny Inc

    EIN 222992100 · Headquarters: GLENS FALLS, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. Sister of Holy Child School

    EIN 111903681 · Headquarters: OLD WESTBURY, NY, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  89. Sister Soldier-stand Up for Each Other Inc

    EIN 461839912 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  90. Sisterhood of Eclectic Bellydance Art Inc

    EIN 863178099 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  91. Sisters from Young Inc

    EIN 871242209 · Headquarters: Brooklyn, NY, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  92. Sisters Keeper

    EIN 812868557 · Headquarters: nanuet, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  93. Sisters Keeping It Positive

    EIN 800257529 · Headquarters: CENTRAL ISLIP, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Sisters N Brothers Making a Change

    EIN 392714842 · Headquarters: Brooklyn, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Sisters Network

    EIN 852218698 · Headquarters: New York, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Sisters of Charity Hospital Foundation

    EIN 222283077 · Headquarters: BUFFALO, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. Sisters of Life

    EIN 061579167 · Headquarters: SUFFERN, NY, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-T

  98. Sisters of St Francis of Neumann Communities

    EIN 204292535 · Headquarters: LIVERPOOL, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-T

  99. Sisters of the Imitation of Christ

    EIN 134358536 · Headquarters: New Hyde Park, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Sisters Servants of Mary Ministers to the Sick Inc

    EIN 510228720 · Headquarters: BRONX, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

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