Unknown & Unclassified nonprofits in Oklahoma

Unknown & Unclassified nonprofits in Oklahoma. Browse 6,510 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. American Business Womens Association

    EIN 731414644 · Headquarters: Moore, OK, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  2. American Chemical Society

    EIN 736095405 · Headquarters: Alva, OK, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  3. American Chemical Society

    EIN 736098473 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. American Chemical Society

    EIN 736103535 · Headquarters: Bartlesville, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. American Chemical Society

    EIN 871858708 · Headquarters: Alva, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. American College of Dentists

    EIN 521415947 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. American College of Emergency Physicians

    EIN 731280918 · Headquarters: Porter, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. American College of Nurse-midwives

    EIN 202239222 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. American College of Physicians

    EIN 510233879 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. American College of Zoological Medicine

    EIN 953986741 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  11. American Council of Engineering Companies of Oklahoma

    EIN 237262513 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. American Dental Assistants Association Oklahoma County

    EIN 731039610 · Headquarters: Moore, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. American Dental Student Association

    EIN 611538669 · Headquarters: Oklahoma City, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  14. American Fed of State Cnty Mun Empl 1180 Oklahoma Local

    EIN 730594970 · Headquarters: TULSA, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  15. American Federation of Government Employees

    EIN 237177592 · Headquarters: GORE, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. American Federation of Government Employees

    EIN 300357826 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. American Federation of Government Employees

    EIN 736103701 · Headquarters: EL RENO, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  18. American Federation of Government Employees

    EIN 736120202 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  19. American Federation of Government Employees 916

    EIN 730738165 · Headquarters: Oklahoma City, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  20. American Federation of Musicians of the Us & Canada

    EIN 730488945 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. American Federation of State County & Municipal Employees

    EIN 510671277 · Headquarters: Enid, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  22. American Federation of Teachers

    EIN 731307393 · Headquarters: SHAWNEE, OK, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  23. American Federation of Teachers

    EIN 731487844 · Headquarters: Tulsa, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  24. American Federation of Teachers Oc Classified Fed

    EIN 731377214 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. AMERICAN FEDERATION OF TEACHERS Oklahoma City Federation of Teachers

    EIN 731123371 · Headquarters: Oklahoma City, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  26. American Federation State County & Municipal Employees 2875 Cty Norman

    EIN 736180131 · Headquarters: NORMAN, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  27. American Fence Association Inc

    EIN 205705348 · Headquarters: Osage, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. American Fidelity Foundation

    EIN 731236059 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  29. American Fisheries Society

    EIN 521820149 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. American Fisheries Society

    EIN 900417133 · Headquarters: Porter, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. American Foundry Society

    EIN 486141321 · Headquarters: Tonkawa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. American Guild of Organists

    EIN 736119015 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. American Guild of Organists Ago

    EIN 731227701 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. American Guild of Organists Ago

    EIN 736102758 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  35. American Gulfcoast Select Best Practices Task Force Association

    EIN 862053791 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  36. American Harp Society

    EIN 842786343 · Headquarters: Midwest City, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  37. American Industrial Hygiene Association

    EIN 311254255 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. American Inns of Court Foundation

    EIN 731287602 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  39. American Inns of Court Foundation

    EIN 731304250 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. American Inns of Court Foundation

    EIN 731473738 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. American Inns of Court Foundation

    EIN 731480899 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. American Inns of Court Foundation

    EIN 731572709 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. American Inns of Court Foundation

    EIN 911829493 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. American Inst for the Improvement of Mathematics Learn & Instrucion

    EIN 731516469 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  45. American Institute of Aeronautics and Astronautics

    EIN 731347887 · Headquarters: Edmond, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. American Institute of Aeronautics and Astronautics

    EIN 736111454 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. American Institute of Architects Oklahoma Chapter

    EIN 731338318 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. American Institute of Chemical Engineers

    EIN 731208328 · Headquarters: Bartesville, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. American Institute of Chemical Engineers Tulsa Section

    EIN 237424913 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. American Institute of Constructors

    EIN 730934883 · Headquarters: ARAPAHO, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. American Legion

    EIN 261900577 · Headquarters: Wagoner, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  52. American Legion

    EIN 462208861 · Headquarters: CATOOSA, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. American Legion

    EIN 522368621 · Headquarters: WEATHERFORD, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. American Legion

    EIN 721519825 · Headquarters: Warr Acres, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. American Legion

    EIN 730552660 · Headquarters: Blackwell, OK, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  56. American Legion

    EIN 730562405 · Headquarters: Ardmore, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. American Legion

    EIN 730583900 · Headquarters: Bartlesville, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  58. American Legion

    EIN 730994086 · Headquarters: Norman, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. American Legion

    EIN 731037850 · Headquarters: CHELSEA, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. American Legion

    EIN 731470306 · Headquarters: Mustang, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. American Legion

    EIN 736102108 · Headquarters: Hugo, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. American Legion

    EIN 736102210 · Headquarters: LAVERNE, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. American Legion

    EIN 736102216 · Headquarters: Coweta, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. American Legion

    EIN 736102224 · Headquarters: Fairview, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. American Legion

    EIN 736102231 · Headquarters: Holdenville, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. American Legion

    EIN 736102236 · Headquarters: Edmond, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. American Legion

    EIN 736102243 · Headquarters: MEDFORD, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. American Legion

    EIN 736102269 · Headquarters: SKIATOOK, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. American Legion

    EIN 736102277 · Headquarters: Tahlequah, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. American Legion

    EIN 736102749 · Headquarters: Antlers, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. American Legion

    EIN 736102897 · Headquarters: Prague, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. American Legion

    EIN 736103132 · Headquarters: TUTTLE, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. American Legion

    EIN 736103347 · Headquarters: maysville, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. American Legion

    EIN 736103361 · Headquarters: Washington, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. American Legion

    EIN 736103365 · Headquarters: Altus, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  76. American Legion

    EIN 736103372 · Headquarters: Wright City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. American Legion

    EIN 736103373 · Headquarters: WYNNEWOOD, OK, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  78. American Legion

    EIN 736103470 · Headquarters: Blanchard, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. American Legion

    EIN 736103473 · Headquarters: Clayton, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. American Legion

    EIN 736103477 · Headquarters: Lindsay, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. American Legion

    EIN 736103559 · Headquarters: Bristow, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. American Legion

    EIN 736103653 · Headquarters: Guymon, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. American Legion

    EIN 736103654 · Headquarters: Beaver, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  84. American Legion

    EIN 736103655 · Headquarters: HOOKER, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. American Legion

    EIN 736103656 · Headquarters: Marietta, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. American Legion

    EIN 736103662 · Headquarters: Kingfisher, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. American Legion

    EIN 736103663 · Headquarters: Mangum, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. American Legion

    EIN 736103893 · Headquarters: Aline, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. American Legion

    EIN 736103898 · Headquarters: Barnsdall, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. American Legion

    EIN 736103910 · Headquarters: Braggs, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. American Legion

    EIN 736103924 · Headquarters: Collinsville, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. American Legion

    EIN 736103931 · Headquarters: Duncan, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. American Legion

    EIN 736103946 · Headquarters: Gage, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. American Legion

    EIN 736103956 · Headquarters: HOMINY, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. American Legion

    EIN 736103961 · Headquarters: JAY, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. American Legion

    EIN 736103970 · Headquarters: Lexington, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. American Legion

    EIN 736103980 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. American Legion

    EIN 736103993 · Headquarters: Salina, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  99. American Legion

    EIN 736104001 · Headquarters: Shawnee, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  100. American Legion

    EIN 736104003 · Headquarters: Tishomingo, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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