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 Delta Pi Fraternity of the United States of America

    EIN 356036986 · Headquarters: Atlanta, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Sigma Delta Sorority

    EIN 010158946 · Headquarters: Hanover, NH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  3. Sigma Delta Tau

    EIN 350867777 · Headquarters: BLOOMINGTON, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. Sigma Delta Tau

    EIN 815249601 · Headquarters: Kent, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Sigma Delta Tau - Gamma Lambda Chapter

    EIN 592933238 · Headquarters: ITHACA, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Sigma Delta Tau - Gamma Theta House Corp

    EIN 161343331 · Headquarters: ITHACA, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  7. Sigma Delta Tau Alpha Beta Chapter

    EIN 050266883 · Headquarters: Wakefield, RI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Sigma Delta Tau Chi Alumnae Corp

    EIN 386068527 · Headquarters: CANTON, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Sigma Delta Tau Gamma Delta Chapter

    EIN 521542579 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  10. Sigma Delta Tau Gamma Tau Chapter

    EIN 061331618 · Headquarters: New York, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  11. Sigma Delta Tau House Corporation Rho Chapter

    EIN 631078579 · Headquarters: TUSCALOOSA, AL, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  12. Sigma Delta Tau Inc Kappa Chapter

    EIN 376043139 · Headquarters: NOVI, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Sigma Delta Tau Rho Chapter

    EIN 630188910 · Headquarters: Tuscaloosa, AL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  14. Sigma Delta Tau Society

    EIN 043071585 · Headquarters: BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Sigma Delta Tau Society

    EIN 362024274 · Headquarters: CARMEL, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Sigma Delta Tau Society

    EIN 382525495 · Headquarters: EAST LANSING, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Sigma Delta Tau Society

    EIN 472093314 · Headquarters: Hoboken, NJ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. Sigma Delta Tau Society

    EIN 473580729 · Headquarters: Carmel, IN, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  19. Sigma Delta Tau Society

    EIN 481004372 · Headquarters: LAWRENCE, KS, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  20. Sigma Delta Tau Society Alpha House Corp

    EIN 841717089 · Headquarters: ITHACA, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. Sigma Delta Tau Society Beta Tau Chapter

    EIN 222419112 · Headquarters: NEW BRUNSWICK, NJ, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  22. Sigma Delta Tau Society Psi Tau Chapter

    EIN 042428297 · Headquarters: AMHERST, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Sigma Delta Tau Society Psi Tau Corporation

    EIN 237193065 · Headquarters: AMHERST, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Sigma Delta Tau Sorority Alpha Theta Chapter

    EIN 520634751 · Headquarters: COLLEGE PARK, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Sigma Delta Tau Sorority Delta Epsilon Chapter

    EIN 900010462 · Headquarters: Atlanta, GA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  26. Sigma Delta Tau Sorority Kappa Chapter

    EIN 370672629 · Headquarters: LIVONIA, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Sigma Delta Tau Sorority-chi Chapte

    EIN 381366189 · Headquarters: CANTON, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Sigma Delta Tau-alpha Nu Chapter Ho

    EIN 883135638 · Headquarters: NOVI, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Sigma Delta Tau-alpha Upsilon

    EIN 370819623 · Headquarters: PEORIA, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  30. Sigma Elpha Epsilon Fraternity

    EIN 421459370 · Headquarters: Iowa City, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Sigma Epsilon of Kappa Delta Foundation

    EIN 010799428 · Headquarters: Austin, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Sigma Epsilon of Kappa Delta House Corp

    EIN 742155975 · Headquarters: Austin, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Sigma Epsilon of Kappa Delta Sorority

    EIN 742205939 · Headquarters: Austin, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Sigma Epsilon Omega National Fraternity

    EIN 851492789 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Sigma Epsilon Omega National Fraternity - Alpha Alumni Chapter

    EIN 861802114 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Sigma Epsilon Omega National Fraternity - Alpha Chpater

    EIN 861840526 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Sigma Epsilon Omega National Fraternity - Alpha Housing Corpora

    EIN 871482418 · Headquarters: Sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Sigma Gama Rho Sorority Inc

    EIN 271388387 · Headquarters: Grapevine, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Sigma Gamm Rho Sorority Inc

    EIN 393875870 · Headquarters: Bentonville, AR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Sigma Gamma Epsilon

    EIN 352597683 · Headquarters: GARY, IN, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  41. Sigma Gamma Epsilon

    EIN 720478319 · Headquarters: CEDAR FALLS, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  42. Sigma Gamma Epsilon

    EIN 742239787 · Headquarters: Macomb, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  43. Sigma Gamma Epsilon

    EIN 815312398 · Headquarters: Tallahassee, FL, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  44. Sigma Gamma Epsilon Eta Gamma Chp

    EIN 870637629 · Headquarters: Ogden, UT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Sigma Gamma Epsilon Gamma Sigma Chp

    EIN 510153242 · Headquarters: Cedar Falls, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Sigma Gamma Epsilon Zeta Iota Chp

    EIN 043153243 · Headquarters: Bridgewater, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  47. Sigma Gamma Foundation

    EIN 386074066 · Headquarters: GROSSE POINTE FARMS, MI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  48. Sigma Gamma Lambda Chapter of Alpha Phi Alpha Fraternity Inc

    EIN 824569394 · Headquarters: Cypress, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  49. Sigma Gamma of Kappa Delta House Corp

    EIN 486118526 · Headquarters: MANHATTAN, KS, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Sigma Gamma Omega Fraternity

    EIN 222844084 · Headquarters: MILTON, DE, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Sigma Gamma Rho

    EIN 726034313 · Headquarters: LAKE CHARLES, LA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Sigma Gamma Rho Beta Phi Sigma

    EIN 815250869 · Headquarters: Jefferson City, MO, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Sigma Gamma Rho Inc

    EIN 851748834 · Headquarters: JACKSON, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Sigma Gamma Rho Inc

    EIN 871027209 · Headquarters: Topeka, KS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Sigma Gamma Rho Inc - Tau Phi Chapter

    EIN 842394622 · Headquarters: Hephzibah, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Sigma Gamma Rho Sor0rity Inc

    EIN 611714507 · Headquarters: SAINT LEO, FL, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  57. Sigma Gamma Rho Soroity

    EIN 842328420 · Headquarters: BROOKLYN, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Sigma Gamma Rho Soroity Inc

    EIN 311360147 · Headquarters: RICHMOND, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sigma Gamma Rho Soroity Inc

    EIN 596197164 · Headquarters: DAYTONA BEACH, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Sigma Gamma Rho Soroity Inc

    EIN 596197165 · Headquarters: JACKSONVILLE, FL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  61. Sigma Gamma Rho Soroity Inc

    EIN 596197166 · Headquarters: NASHVILLE, TN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Sigma Gamma Rho Soroity Inc

    EIN 616035702 · Headquarters: LOUISVILLE, KY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Sigma Gamma Rho Soroity Inc

    EIN 626047324 · Headquarters: BEECH BLUFF, TN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Sigma Gamma Rho Soroity Inc

    EIN 626047392 · Headquarters: NASHVILLE, TN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Sigma Gamma Rho Soroity Inc

    EIN 902363550 · Headquarters: PFLUGERVILLE, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Sigma Gamma Rho Soroity Inc Charter Sigma Omega

    EIN 981195026 · Headquarters: Ottawa, CA · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  67. Sigma Gamma Rho Sorority

    EIN 262976299 · Headquarters: Morrow, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Sigma Gamma Rho Sorority

    EIN 271356216 · Headquarters: SPRINGFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Sigma Gamma Rho Sorority

    EIN 272531695 · Headquarters: MARSHALL, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Sigma Gamma Rho Sorority

    EIN 311333118 · Headquarters: BRATENAHL, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Sigma Gamma Rho Sorority

    EIN 311437344 · Headquarters: ALBUQUERQUE, NM, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Sigma Gamma Rho Sorority

    EIN 320698953 · Headquarters: MONROE, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Sigma Gamma Rho Sorority

    EIN 333406917 · Headquarters: MACOMB, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Sigma Gamma Rho Sorority

    EIN 372006913 · Headquarters: HAMMOND, LA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Sigma Gamma Rho Sorority

    EIN 392509399 · Headquarters: DARBY, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Sigma Gamma Rho Sorority

    EIN 392509654 · Headquarters: GWYNN OAK, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Sigma Gamma Rho Sorority

    EIN 392509738 · Headquarters: OSSINING, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Sigma Gamma Rho Sorority

    EIN 392511097 · Headquarters: WARSAW, NC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Sigma Gamma Rho Sorority

    EIN 471333179 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Sigma Gamma Rho Sorority

    EIN 833037775 · Headquarters: LAS VEGAS, NV, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Sigma Gamma Rho Sorority

    EIN 841769011 · Headquarters: EL PASO, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Sigma Gamma Rho Sorority

    EIN 842141436 · Headquarters: MACOMB, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Sigma Gamma Rho Sorority

    EIN 851036650 · Headquarters: SAN DIEGO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Sigma Gamma Rho Sorority

    EIN 900785554 · Headquarters: ATHENS, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Sigma Gamma Rho Sorority

    EIN 900990061 · Headquarters: FLINT, MI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Sigma Gamma Rho Sorority

    EIN 933217189 · Headquarters: MAGNOLIA, AR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Sigma Gamma Rho Sorority

    EIN 933336081 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Sigma Gamma Rho Sorority

    EIN 933399867 · Headquarters: Versailles, KY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Sigma Gamma Rho Sorority

    EIN 933443560 · Headquarters: SAVANNAH, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Sigma Gamma Rho Sorority

    EIN 933497322 · Headquarters: GRAPEVINE, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Sigma Gamma Rho Sorority

    EIN 991876212 · Headquarters: CASEYVILLE, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Sigma Gamma Rho Sorority

    EIN 992638214 · Headquarters: WEST HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Sigma Gamma Rho Sorority

    EIN 992669446 · Headquarters: SHAWNEE, KS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Sigma Gamma Rho Sorority

    EIN 993996099 · Headquarters: HOPKINSVILLE, KY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Sigma Gamma Rho Sorority - Alpha Lambda Chapter

    EIN 262611504 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Sigma Gamma Rho Sorority - Eta Theta Sigma

    EIN 814248022 · Headquarters: SILVER SPRING, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Sigma Gamma Rho Sorority Delta Iota Sigma

    EIN 770715611 · Headquarters: Charleston, SC, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  98. Sigma Gamma Rho Sorority Inc

    EIN 010916197 · Headquarters: CHARLESTON, SC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Sigma Gamma Rho Sorority Inc

    EIN 010960777 · Headquarters: RALEIGH, NC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Sigma Gamma Rho Sorority Inc

    EIN 010967955 · Headquarters: CARY, NC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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