Nonprofits in Oklahoma

Nonprofits in Oklahoma. Browse 25,638 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 Gamma Rho Sorority Inc

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

  2. Sigma Gamma Tau National Honor Society in Aerospace Engineering

    EIN 911789915 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  3. Sigma Kappa Sorority

    EIN 462147438 · Headquarters: Tulsa, OK, US · Education · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  4. Sigma Nu Corporation of Oklahoma

    EIN 736098935 · Headquarters: Norman, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Sigma Nu Fraternity

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

  6. Sigma Nu Fraternity

    EIN 731561885 · Headquarters: Edmond, OK, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  7. Sigma Oklahoma Foundation Incorporated

    EIN 542098955 · Headquarters: Edmond, OK, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Sigma Omicron Housing Association

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

  9. 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

  10. 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

  11. 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

  12. Sigma Phi Epsilon Fraternity Inc

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

  13. 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

  14. 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

  15. 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

  16. Sigma Phi Gamma International Sorority Inc

    EIN 736097968 · Headquarters: Oklahoma City, OK, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  17. 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

  18. Sigma Pi Fraternity International Inc

    EIN 272280099 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  19. Sigma Sigma Sigma Inc

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

  20. Sigma Sigma Sigma Inc

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

  21. 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

  22. Sigma Theta Tau Inc

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

  23. 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

  24. Sigma Theta Tau International Inc

    EIN 900357476 · Headquarters: Tulsa, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  25. Sigma Theta Tau International-mu Iota Chapter

    EIN 311309957 · Headquarters: TULSA, OK, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Sigma Xi Chapter 645

    EIN 463738094 · Headquarters: Edmond, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Signet Covenant Alliance Inc

    EIN 454510608 · Headquarters: Tulsa, OK, US · Religion Related · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  28. Signing for the Lord

    EIN 463610319 · Headquarters: Oklahoma City, OK, US · Youth Development · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  29. Signs and Wonders a Last Days Ministry Inc

    EIN 870757560 · Headquarters: Tulsa, OK, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Sikh Gurdwara of Oklahoma Inc

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

  31. Silas Foundation Co Trust

    EIN 736260168 · Headquarters: DEWEY, OK, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2018 · Primary form: IRS Form 990-PF

  32. Silent Lotus Inc

    EIN 462031530 · Headquarters: TULSA, OK, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Silent War Foundation

    EIN 460905444 · Headquarters: lawton, OK, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. 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

  35. Silo 4-H and Ffa Booster Club

    EIN 332407483 · Headquarters: Durant, OK, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Silo Alumni Association Inc

    EIN 205663853 · Headquarters: calera, OK, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. 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

  38. 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

  39. Silver City Volunteer Fire Department

    EIN 731499048 · Headquarters: Jennings, OK, US · Human Services · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  40. Silver Lining Foundation

    EIN 201987349 · Headquarters: NORMAN, OK, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  41. Silver Lining Foundation

    EIN 731591650 · Headquarters: Tulsa, OK, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Silver Paws Golden Days Co

    EIN 331329375 · Headquarters: Newalla, OK, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Silver Service of Tulsa

    EIN 800359286 · Headquarters: Broken Arrow, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Silver Spur Rescue Foundation

    EIN 821011699 · Headquarters: DEPEW, OK, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Silver Spur Square Dance Club

    EIN 237085997 · Headquarters: Warr Acres, OK, US · Recreation & Sports · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  46. Silver Strings of Putnam City Inc

    EIN 474466620 · Headquarters: Oklahoma City, OK, US · Arts, Culture & Humanities · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  47. Simmons Family Foundation

    EIN 475605864 · Headquarters: OWASSO, OK, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  48. Simon Estes Educational Foundation

    EIN 731201809 · Headquarters: TULSA, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Simon Fletcher Foundation Inc

    EIN 263842925 · Headquarters: NORMAN, OK, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  50. Simple Life Inc

    EIN 274619742 · Headquarters: Guthrie, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Simplicity of Jesus Ministries Inc

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

  52. Simply Indie Film Fest Inc

    EIN 834405895 · Headquarters: Edmond, OK, US · Arts, Culture & Humanities · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  53. Sine Nomine Singer Inc

    EIN 731553655 · Headquarters: Shawnee, OK, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Sinergy Cyber Foundation

    EIN 394641892 · Headquarters: Tulsa, OK, US · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Sinfonia Orchestral Society Inc

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

  56. Singing Grace Ranch

    EIN 823146270 · Headquarters: Meeker, OK, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Singing with the Spirit Inc

    EIN 991249199 · Headquarters: OKLAHOMA CITY, OK, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  58. Single Dog Seeking Inc

    EIN 812869701 · Headquarters: Tulsa, OK, US · Animal Related · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  59. Single Parent Support Network Assoc

    EIN 272851013 · Headquarters: Oklahoma City, OK, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  60. Single Womens Action Network Co

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

  61. Singles Available for Community Service Inc

    EIN 731388762 · Headquarters: Tulsa, OK, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  62. Sinners & Saints Organizationn Inc

    EIN 830709344 · Headquarters: Yukon, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Sino-intl Foundation Education Art Humanity

    EIN 264533523 · Headquarters: Tulsa, OK, US · Education · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  64. Sion Inc

    EIN 731492136 · Headquarters: Cordell, OK, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  65. Sirloin Club of Oklahoma

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

  66. Sister Cities Okc Inc

    EIN 464028057 · Headquarters: OKLAHOMA CITY, OK, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Sister Friends Oklahoma City Chapter

    EIN 223878081 · Headquarters: Oklahoma City, OK, US · Public & Societal Benefit · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  68. Sister India Ltd

    EIN 465600981 · Headquarters: Tulsa, OK, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Sister Love

    EIN 811531341 · Headquarters: okmulgee, OK, US · Human Services · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  70. Sister Sherry Lynn Foundation Inc

    EIN 731564369 · Headquarters: Marlow, OK, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Sisters Arise Co

    EIN 991232218 · Headquarters: WYANDOTTE, OK, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Sisters Making a Difference Inc

    EIN 205407544 · Headquarters: Slick, OK, US · Human Services · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  73. Sisters Sippin Tea Literary Group- Tulsa Chapter

    EIN 562428593 · Headquarters: Tulsa, OK, US · Education · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  74. Sisters with Heart Inc

    EIN 264571005 · Headquarters: Arcadia, OK, US · Human Services · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  75. Sisu Youth Inc

    EIN 465678806 · Headquarters: OKLAHOMA CITY, OK, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Sit Down and Learn from the Master Ministries Incorporated

    EIN 473309355 · Headquarters: Holdenville, OK, US · Religion Related · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  77. SixTwelve

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

  78. SJ-Carthage Inc

    EIN 731504090 · Headquarters: Tulsa, OK, USA · Community Improvement & Capacity Building · Latest available filing year: 2011 · Primary form: IRS Form 990

  79. Sjc Sports

    EIN 833755153 · Headquarters: STILLWATER, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. 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

  81. Skelly Elementary Pto

    EIN 455412773 · Headquarters: Tulsa, OK, US · Education · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  82. 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

  83. Skiatook Band Boosters

    EIN 300268714 · Headquarters: Skiatook, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Skiatook Basketball Club

    EIN 830969491 · Headquarters: Skiatook, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Skiatook Bluegrass Association Inc

    EIN 203265088 · Headquarters: Skiatook, OK, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Skiatook Bulldogs Football Assoc

    EIN 881015715 · Headquarters: SKIATOOK, OK, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  87. Skiatook Cub Scout Pack 250

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

  88. Skiatook Emergency Assistance Cente

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

  89. Skiatook Ffa Parents Club

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

  90. Skiatook Flying Club Llc

    EIN 352604916 · Headquarters: Skiatook, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Skiatook Foundation

    EIN 731604693 · Headquarters: SKIATOOK, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Skiatook Lake Area Arts and Humanities Council Incorporated

    EIN 731437231 · Headquarters: Skiatook, OK, US · Arts, Culture & Humanities · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  93. Skiatook Lake Association Inc

    EIN 263691818 · Headquarters: SKIATOOK, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Skiatook Paws and Claws Animal Rescue Inc

    EIN 830792743 · Headquarters: Skiatook, OK, USA · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. 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

  96. Skiatook Soccer Club

    EIN 731329689 · Headquarters: Skiatook, OK, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  97. Skills for Life Foundation

    EIN 812614626 · Headquarters: Lawton, OK, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Skit Guys Inc

    EIN 752853992 · Headquarters: EDMOND, OK, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Sky Foundation Inc

    EIN 731578930 · Headquarters: OKLAHOMA CITY, OK, USA · Education · Latest available filing year: 2016 · Primary form: IRS Form 990

  100. Skydance Chapter Nsdar

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

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