Unknown & Unclassified nonprofits

Unknown & Unclassified nonprofits. Browse 557,756 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 Tau Gamma Fraternity

    EIN 716057709 · Headquarters: Monticello, AR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Sigma Tau Gamma Fraternity

    EIN 812020347 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  3. Sigma Tau Gamma Fraternity

    EIN 814663927 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  4. Sigma Tau Gamma Fraternity

    EIN 871688999 · Headquarters: TOWSON, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  5. Sigma Tau Gamma Fraternity Alpha Epsilon Chapter

    EIN 815010887 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  6. Sigma Tau Gamma Fraternity Alpha Pi Chapter

    EIN 822510796 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  7. Sigma Tau Gamma Fraternity Beta Chi Chapter

    EIN 476031851 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Sigma Tau Gamma Fraternity Beta Xi Chapter

    EIN 611720546 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  9. Sigma Tau Gamma Fraternity Chi Chapter

    EIN 810862129 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  10. Sigma Tau Gamma Fraternity D/b/a Alpha Chapter

    EIN 436067083 · Headquarters: WARRENSBURG, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Sigma Tau Gamma Fraternity D/b/a Alpha Omega Chapter

    EIN 430732986 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  12. Sigma Tau Gamma Fraternity D/b/a Beta

    EIN 436067168 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Sigma Tau Gamma Fraternity D/b/a Beta Alpha Chapter

    EIN 431375276 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  14. Sigma Tau Gamma Fraternity D/b/a Beta Gamma Chapter

    EIN 043762083 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  15. Sigma Tau Gamma Fraternity D/b/a Beta Iota

    EIN 256063146 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. Sigma Tau Gamma Fraternity D/b/a Beta Theta Chapter

    EIN 300728367 · Headquarters: WEST LAFAYETTE, IN, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  17. Sigma Tau Gamma Fraternity D/b/a Beta Upsilon

    EIN 346577070 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. Sigma Tau Gamma Fraternity D/b/a Beta Zeta Chapter

    EIN 730749645 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Sigma Tau Gamma Fraternity D/b/a Delta Alpha Chapter

    EIN 371594419 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  20. Sigma Tau Gamma Fraternity D/b/a Delta Psi

    EIN 822573477 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Sigma Tau Gamma Fraternity D/b/a Delta Upsilon

    EIN 363723993 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Sigma Tau Gamma Fraternity D/b/a Epsilon Chi

    EIN 472258764 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  23. Sigma Tau Gamma Fraternity D/b/a Epsilon Delta

    EIN 465520350 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  24. Sigma Tau Gamma Fraternity D/b/a Epsilon Lambda

    EIN 611675769 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Sigma Tau Gamma Fraternity D/b/a Epsilon Omicron

    EIN 201874895 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Sigma Tau Gamma Fraternity D/b/a Epsilon Phi

    EIN 300761994 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Sigma Tau Gamma Fraternity D/b/a Epsilon Rho

    EIN 264080559 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Sigma Tau Gamma Fraternity D/b/a Epsilon Sigma

    EIN 113843901 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Sigma Tau Gamma Fraternity D/b/a Epsilon Zeta

    EIN 860929553 · Headquarters: PRESCOTT, AZ, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  30. Sigma Tau Gamma Fraternity D/b/a Eta Nu

    EIN 842623136 · Headquarters: MADISON, WI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  31. Sigma Tau Gamma Fraternity D/b/a Gamma Beta

    EIN 396097725 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Sigma Tau Gamma Fraternity D/b/a Gamma Chi

    EIN 510176084 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  33. Sigma Tau Gamma Fraternity D/b/a Gamma Pi Chapter

    EIN 363373528 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  34. Sigma Tau Gamma Fraternity D/b/a Gamma Tau

    EIN 237353676 · Headquarters: MILLERSVILLE, PA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  35. Sigma Tau Gamma Fraternity D/b/a Gamma Xi

    EIN 391212063 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  36. Sigma Tau Gamma Fraternity D/b/a Kappa Chapter

    EIN 263859147 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Sigma Tau Gamma Fraternity D/b/a Mu Chapter

    EIN 736103600 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Sigma Tau Gamma Fraternity D/b/a Theta

    EIN 436067165 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  39. Sigma Tau Gamma Fraternity D/b/a Zeta Alpha

    EIN 472875488 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Sigma Tau Gamma Fraternity D/b/a Zeta Chapter

    EIN 730677853 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. Sigma Tau Gamma Fraternity D/b/a Zeta Omega Associate Chapter

    EIN 824018798 · Headquarters: COLUMBUS, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  42. Sigma Tau Gamma Fraternity D/b/a Zeta Phi Associate Chapter

    EIN 822498753 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Sigma Tau Gamma Fraternity D/b/a Zeta Psi Associate Chapter

    EIN 824035944 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Sigma Tau Gamma Fraternity D/b/a Zeta Upsilon Associate Chapter

    EIN 822422481 · Headquarters: LINCOLN, NE, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  45. Sigma Tau Gamma Fraternity DBA Beta Rho Associate Chapter

    EIN 822464747 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  46. Sigma Tau Gamma Fraternity Dba Eta Kappa Chapter

    EIN 831929197 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  47. Sigma Tau Gamma Fraternity Dba Gamma Rho Chapter

    EIN 911924147 · Headquarters: LAWTON, OK, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  48. Sigma Tau Gamma Fraternity DBA Zeta Tau Associate Chapter

    EIN 822417111 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  49. Sigma Tau Gamma Fraternity Epsilon Omega Chapter

    EIN 472920831 · Headquarters: Melbourne, FL, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  50. 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

  51. Sigma Tau Gamma Fraternity Gamma Alpha Chapter

    EIN 236420574 · Headquarters: Indianapolis, IN, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  52. Sigma Tau Gamma Fraternity Gamma Phi Chapter

    EIN 237359646 · Headquarters: EVANSVILLE, IN, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  53. Sigma Tau Gamma Fraternity Inc

    EIN 430689936 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Sigma Tau Gamma Fraternity Lambda Chapter

    EIN 475430646 · Headquarters: SPEARFISH, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  55. Sigma Tau Gamma Fraternity Phi Chapter

    EIN 726028268 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  56. Sigma Tau Gamma Fraternity Psi Chapter

    EIN 911924132 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Sigma Tau Gamma Fraternity Sigma Chapter

    EIN 716057356 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  58. Sigma Tau Gamma Fraternity Zeta Beta Chapter

    EIN 465047276 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. Sigma Tau Gamma Fraternity Zeta Kappa Chapter

    EIN 811400536 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. Sigma Tau Gamma Fraternity Zeta Lambda Chapter

    EIN 811273175 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Sigma Tau Gamma Fraternity Zeta Mu Chapter

    EIN 811205195 · Headquarters: CARMEL, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Sigma Tau Gamma Fraternity Zeta Omicron Chapter

    EIN 810861531 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  63. Sigma Tau Gamma Fraternity Zeta Pi Chapter

    EIN 812186238 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  64. Sigma Tau Gamma Zeta Pi Alumni Association

    EIN 853462760 · Headquarters: Oro Valley, AZ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Sigma Tau of Kappa Delta Housing Associa

    EIN 916055585 · Headquarters: Veradale, WA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Sigma Tau Teke

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

  67. Sigma Ten

    EIN 421355675 · Headquarters: Lawrence, KS, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  68. Sigma Theta Chapter of Sigma Alpha Mu Inc

    EIN 740898333 · Headquarters: AUSTIN, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. 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

  70. Sigma Theta Tai Inc

    EIN 366207433 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Sigma Theta Tau

    EIN 386115929 · Headquarters: ANN ARBOR, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Sigma Theta Tau

    EIN 470576544 · Headquarters: Omaha, NE, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Sigma Theta Tau Alpha Eta Chapter School of Nursing Ucsf

    EIN 946129571 · Headquarters: SAN FRANCISCO, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Sigma Theta Tau Fraternity Eta Delta Chapter

    EIN 363314859 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  75. Sigma Theta Tau Fraternity Eta Epsilon Chapter

    EIN 363314858 · Headquarters: Pittsburgh, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Sigma Theta Tau Icn

    EIN 421234649 · Headquarters: Newton, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Sigma Theta Tau Inc

    EIN 042609600 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Sigma Theta Tau Inc

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

  79. Sigma Theta Tau Inc

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

  80. Sigma Theta Tau Inc

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

  81. Sigma Theta Tau Inc

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

  82. Sigma Theta Tau Inc

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

  83. Sigma Theta Tau Inc

    EIN 232160239 · Headquarters: Jamison, PA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Sigma Theta Tau Inc

    EIN 236434830 · Headquarters: Villanova, PA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Sigma Theta Tau Inc

    EIN 237111287 · Headquarters: Dallas, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Sigma Theta Tau Inc

    EIN 237111288 · Headquarters: San Francisco, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Sigma Theta Tau Inc

    EIN 237111289 · Headquarters: Fort Worth, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Sigma Theta Tau Inc

    EIN 237111291 · Headquarters: East Lansing, MI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Sigma Theta Tau Inc

    EIN 237111294 · Headquarters: Chestnut Hill, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Sigma Theta Tau Inc

    EIN 237243779 · Headquarters: Madison, WI, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  91. Sigma Theta Tau Inc

    EIN 237243780 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Sigma Theta Tau Inc

    EIN 237243781 · Headquarters: Charlottesville, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Sigma Theta Tau Inc

    EIN 237243782 · Headquarters: Memphis, TN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Sigma Theta Tau Inc

    EIN 237377861 · Headquarters: Loma Linda, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Sigma Theta Tau Inc

    EIN 237406350 · Headquarters: Tallahassee, FL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Sigma Theta Tau Inc

    EIN 237407405 · Headquarters: State College, PA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Sigma Theta Tau Inc

    EIN 237407410 · Headquarters: CORAL GABLES, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Sigma Theta Tau Inc

    EIN 237414498 · Headquarters: San Diego, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Sigma Theta Tau Inc

    EIN 256063593 · Headquarters: Pittsburgh, PA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  100. Sigma Theta Tau Inc

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

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