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. Shriners International

    EIN 384358949 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Shriners International

    EIN 731031881 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  3. Shriners International

    EIN 731361842 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  4. Shriners International

    EIN 731468818 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  5. Shriners International

    EIN 731496612 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  6. Shriners International

    EIN 902458083 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Sid & Jane Willis Foundation Inc

    EIN 731435564 · Headquarters: MADILL, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  8. Sigma Alpha Epsilon Fraternity

    EIN 811668505 · Headquarters: edmond, OK, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  9. Sigma Alpha Epsilon Oklahoma Kappa Chapter

    EIN 730581503 · Headquarters: NORMAN, OK, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  10. Sigma Alpha Epsilon Province X

    EIN 465602566 · Headquarters: EDMOND, OK, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  11. Sigma Chi Fraternity Beta Kappa Chapter

    EIN 736100261 · Headquarters: Norman, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Sigma Chi Fraternity Delta Omega Chapter

    EIN 730605005 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Sigma Chi Parents Club

    EIN 922038627 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Sigma Gamma Rho Sorority

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

  15. Sigma Gamma Rho Sorority Inc

    EIN 471207647 · Headquarters: OKLAHOMA CITY, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Sigma Gamma Rho Sorority Inc

    EIN 731312514 · Headquarters: OKLAHOMA CITY, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Sigma Gamma Rho Sorority Inc

    EIN 736104164 · Headquarters: MIDWEST CITY, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Sigma Gamma Rho Sorority Inc

    EIN 736111843 · Headquarters: TULSA, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Sigma Gamma Rho Sorority Inc

    EIN 736111844 · Headquarters: OKLAHOMA CITY, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Sigma Gamma Rho Sorority Inc

    EIN 900606064 · Headquarters: OKLAHOMA CITY, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. Sigma Nu Fraternity

    EIN 730581049 · Headquarters: Tulsa, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Sigma Omicron Housing Association

    EIN 730758187 · Headquarters: TULSA, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363890608 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 731066763 · Headquarters: Midwest City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 731073414 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Sigma Phi Epsilon Fraternity Inc

    EIN 521316711 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Sigma Phi Epsilon Fraternity Ok Beta Chapter

    EIN 730582629 · Headquarters: EDMOND, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Sigma Phi Gamma International Sorority Inc

    EIN 521292952 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  29. Sigma Phi Gamma International Sorority Inc

    EIN 731333615 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  30. Sigma Phi Gamma International Sorority Inc

    EIN 736103522 · Headquarters: Ponca City, OK, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  31. Sigma Sigma Sigma Inc

    EIN 731094186 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Sigma Sigma Sigma Inc

    EIN 731364481 · Headquarters: Edmond, OK, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  33. 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

  34. Sigma Theta Tau Inc

    EIN 311042691 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Sigma Theta Tau International Inc

    EIN 237114399 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Sikh Gurdwara of Oklahoma Inc

    EIN 731189938 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990

  37. Sill-o-ette Squares Western Square Dancing Club

    EIN 731157950 · Headquarters: Elgin, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Silo Rebels Baseball Booster Club Inc

    EIN 471788955 · Headquarters: Durant, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  39. Silver City Antique Tractor Club Inc

    EIN 731450279 · Headquarters: TUTTLE, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Simplicity of Jesus Ministries Inc

    EIN 731553742 · Headquarters: Tecumseh, OK, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  41. Sinfonia Orchestral Society Inc

    EIN 852429490 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Single Womens Action Network Co

    EIN 471174187 · Headquarters: NORMAN, OK, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  43. Sirloin Club of Oklahoma

    EIN 736102813 · Headquarters: Oklahoma City, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  44. SixTwelve

    EIN 275215598 · Headquarters: Oklahoma City, OK, United States · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  45. Skeet Phillips and Louise Phillips Trust Co

    EIN 731291173 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  46. Ski Island Lake Club Inc

    EIN 237402698 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  47. Skiatook Cub Scout Pack 250

    EIN 471840599 · Headquarters: Skiatook, OK, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  48. Skiatook Emergency Assistance Cente

    EIN 731319139 · Headquarters: Skiatook, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  49. Skiatook Ffa Parents Club

    EIN 731461131 · Headquarters: Skiatook, OK, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  50. Skiatook Public Schools Support Foundation Inc

    EIN 731435102 · Headquarters: SKIATOOK, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Skydance Chapter Nsdar

    EIN 412497897 · Headquarters: EDMOND, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Skyline Elementary Pta

    EIN 731052994 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  53. Skyview Parent-teacher Organization of Yukon Oklahoma Inc

    EIN 731255636 · Headquarters: Yukon, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  54. Slapout Community Center Inc

    EIN 800685861 · Headquarters: Laverne, OK, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  55. Smacna of Oklahoma Inc

    EIN 730710255 · Headquarters: TULSA, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  56. Small Business Capital Corporation

    EIN 731447364 · Headquarters: TULSA, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. Smart Recruitment and Retention Council

    EIN 862337061 · Headquarters: PONCA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ

  58. Smithville Cemetery Association

    EIN 800345684 · Headquarters: SMITHVILLE, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Snu Real Property Holdings Inc

    EIN 820756542 · Headquarters: BETHANY, OK, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  60. Snyder Diamond Divas

    EIN 611758007 · Headquarters: Snyder, OK, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  61. Society for Applied Anthropology

    EIN 150588968 · Headquarters: OKLAHOMA CITY, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  62. Society for Marketing Professional Services

    EIN 731621722 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Society for Neuroscience

    EIN 811664732 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 431090715 · Headquarters: WYANDOTTE, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  65. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 481095476 · Headquarters: Hooker, OK, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  66. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 730777942 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 736108810 · Headquarters: Lawton, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Society for Preservation & Encrgmnt of Barbershop Quartet Singing Amer

    EIN 474973910 · Headquarters: Edmond, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Society for Scientific Exploration

    EIN 541191441 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  70. Society of American Military Engine

    EIN 736102815 · Headquarters: TULSA, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  71. Society of American Military Engineers

    EIN 452507440 · Headquarters: Sand Springs, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Society of American Military Engineers

    EIN 736111811 · Headquarters: Edmond, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Society of Exploration Geophysicists

    EIN 730555125 · Headquarters: TULSA, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. Society of Fire Protection Engineer

    EIN 461855402 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  75. Society of Government Meeting Professionals Inc

    EIN 731621698 · Headquarters: Norman, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. Society of Health and Physical Educators

    EIN 731184279 · Headquarters: Edmond, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  77. Society of Manufacturing Engineers

    EIN 736111628 · Headquarters: Glencoe, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Society of Manufacturing Engineers

    EIN 736111629 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Society of Permanent Cosmetic Professionals

    EIN 943127991 · Headquarters: Tulsa, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  80. Society of Petrophysicists and Well Log Analysts Inc

    EIN 731333833 · Headquarters: OKC, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Society of Phi Zeta

    EIN 736109389 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  82. Society of Plastics Engineers

    EIN 736104167 · Headquarters: Bartlesvillle, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Society of Women Engineers

    EIN 710895650 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Sod School House Cemetery

    EIN 384323932 · Headquarters: Cordell, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Soles Reaching Souls Foundation

    EIN 931451031 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Sonlight 319 Ministries

    EIN 455635271 · Headquarters: BERNICE, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Sons & Daughters of the Cherokee Strip Pioneers

    EIN 237196960 · Headquarters: Enid, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Sons of Confederate Veterans Inc

    EIN 202023968 · Headquarters: Pryor, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  89. Sons of Confederate Veterans Inc

    EIN 582082837 · Headquarters: OKC, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Sons of Confederate Veterans Inc

    EIN 731120207 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Sons of Confederate Veterans Inc

    EIN 844821850 · Headquarters: Broken Arrow, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  92. Sons of Norway

    EIN 204779946 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Sons of Union Veterans of the Civil War

    EIN 262153633 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Sons of Union Veterans of the Civil War

    EIN 454300785 · Headquarters: Jenks, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Sons of Union Veterans of the Civil War

    EIN 731575591 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Sonss of American Legion Mohawk Post 308

    EIN 862605938 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  97. Sooner Decorative Artists

    EIN 352494046 · Headquarters: OKLAHOMA CITY, OK, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  98. Sooner High Class of 74

    EIN 934774876 · Headquarters: Bartlesville, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Sooner Hope

    EIN 882166233 · Headquarters: EDMOND, OK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  100. Sooner Judo Club

    EIN 731359788 · Headquarters: Norman, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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