Nonprofits in Stillwater, Oklahoma

Nonprofits in Stillwater, Oklahoma. Browse 1,006 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. 1889Institute

    EIN 841912235 · Headquarters: Stillwater, OK, US · Public & Societal Benefit · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  2. 4-H Clubs & Affiliated 4-H Organizations

    EIN 204092506 · Headquarters: Stillwater, OK, US · Youth Development · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  3. 4-H Clubs & Affiliated 4-H Organizations

    EIN 204111697 · Headquarters: Stillwater, OK, US · Youth Development · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  4. 4-H Clubs & Affiliated 4-H Organizations

    EIN 383731246 · Headquarters: Stillwater, OK, US · Youth Development · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  5. 4Kidzsake-org Inc

    EIN 882296629 · Headquarters: Stillwater, OK, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. About Face Womens Program Inc

    EIN 852311868 · Headquarters: STILLWATER, OK, US · Crime & Legal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Administration Division of the Oklahoma Association of Career & T

    EIN 364705578 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Agricultural Leadership of Oklahoma Inc

    EIN 731384570 · Headquarters: Stillwater, OK, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Alabama Auctioneers Association

    EIN 630982568 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  10. Allies Lunar Love

    EIN 933221496 · Headquarters: Stillwater, OK, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Alpha Chi Omega Gamma Epsilon Chapter

    EIN 736099722 · Headquarters: Stillwater, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Alpha Epsilon Delta

    EIN 736111453 · Headquarters: Stillwater, OK, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  13. Alpha Gamma Rho Fraternity Pi Chapter

    EIN 730582564 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Alpha Kappa Alpha Sorority Inc

    EIN 364320748 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  15. Alpha Kappa Psi Fraternity

    EIN 736111821 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  16. Alpha Phi Omega

    EIN 731551792 · Headquarters: STILLWATER, OK, US · Human Services · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  17. Alpha Pi Mu Association

    EIN 736102790 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. Alpha Tau Omega Fraternity

    EIN 510231330 · Headquarters: Stillwater, OK, USA · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-EZ

  19. Altrusa International Foundation Inc

    EIN 270672275 · Headquarters: STILLWATER, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Altrusa International Inc

    EIN 736095191 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  21. Alumnae of Tau Beta Chapter of Chi Omega Fraternity

    EIN 736096860 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Amazing Grace Foundations

    EIN 334264298 · Headquarters: Stillwater, OK, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. American Christian Fiction Writers Inc

    EIN 463121030 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. American Collegiate Retailing Association

    EIN 863838579 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. American Fisheries Society

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

  26. American Guild of Organists Ago

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

  27. 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

  28. American Legion Auxiliary

    EIN 201280238 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. American Legion HannerSharpPost129

    EIN 736102274 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  30. American Postal Workers Union

    EIN 731189734 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. American Veterinary Medical Assocication Oklahoma State Student Chapter Avma

    EIN 736103133 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  32. Ancient Free & Accepted Masons of Oklahoma

    EIN 237143252 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Aoi Inc

    EIN 731599733 · Headquarters: Stillwater, OK, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Aoii Omega Sigma Chapter Parents Club

    EIN 455603126 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  35. Appa-association of Higher Education Facilities Officers

    EIN 455514889 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Arkansas Auctioneers Assn

    EIN 710767536 · Headquarters: STILLWATER, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Army Ground Forces Association

    EIN 208974480 · Headquarters: Stillwater, OK, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  38. Arnold Air Society-silver Wings

    EIN 736102305 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  39. Ars - Americas Redemption System Inc

    EIN 260281296 · Headquarters: STILLWATER, OK, USA · International, Foreign Affairs & National Security · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  40. Arts & Humanities Council of Stillwater Oklahoma Inc

    EIN 237258514 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Asia International Mission Inc

    EIN 263670814 · Headquarters: STILLWATER, OK, US · International, Foreign Affairs & National Security · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  42. Association for Computing Machinery

    EIN 736108766 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  43. Association of Operating Room Nurses Inc

    EIN 731415844 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  44. Association of Operating Room Nurses Inc

    EIN 731544653 · Headquarters: Stillwater, OK, US · Health Care · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  45. Association of Retired Conservation Service Employees

    EIN 237322642 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. ATO EO Housing Corporation

    EIN 475114530 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Bays Family Cemetery Foundation Inc

    EIN 475158897 · Headquarters: Stillwater, OK, US · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Benevolent and Protective Order of the Elks 1859 Stillwater

    EIN 730616763 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Beta Alpha Psi National Council

    EIN 237352214 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Beta Psi of Gamma Phi Beta Inc

    EIN 730676032 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Beta Zeta Alum Corp of Kappa Alpha Theta

    EIN 736097296 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  52. Birthright of Stillwater Inc AKA Birth Choice of Stillwater

    EIN 730972175 · Headquarters: Stillwater, OK, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990

  53. Books Over the World Inc

    EIN 844744866 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Business Analytics Student Association

    EIN 920603625 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Casa for Kids Inc

    EIN 731396936 · Headquarters: STILLWATER, OK, USA · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. Central Community Foundation

    EIN 204700369 · Headquarters: STILLWATER, OK, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  57. Central Plains Dressage Society Inc

    EIN 822504956 · Headquarters: STILLWATER, OK, USA · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  58. Central Rural Electric Cooperative

    EIN 730177775 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Cff Inc

    EIN 371900705 · Headquarters: STILLWATER, OK, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  60. Change for Congo Inc

    EIN 831035674 · Headquarters: Stillwater, OK, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Chi Omega Fraternity

    EIN 352192736 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Chi Omega Fraternity

    EIN 730581048 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. Christian Womens Outreach Inc

    EIN 731460508 · Headquarters: Stillwater, OK, US · Religion Related · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  64. Church Women United

    EIN 510200876 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  65. Cimarron Business Women

    EIN 460488158 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  66. Circle K International Inc

    EIN 271889947 · Headquarters: Stillwater, OK, US · Youth Development · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  67. Citizens of Lake Mcmurtry Association

    EIN 451173767 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  68. Colorado Auctioneers Association Inc 03-17-92

    EIN 841200287 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  69. Community Resourcing Inc Dba Our Daily Bread Food & Resource Ctr

    EIN 352541161 · Headquarters: STILLWATER, OK, USA · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. Companion Animal Assistance Program

    EIN 731616133 · Headquarters: Stillwater, OK, USA · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  71. Cornerstone Advantage Inc

    EIN 731594429 · Headquarters: Stillwater, OK, US · Human Services · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  72. Cottage of Healing & Restoration Foundation

    EIN 394737086 · Headquarters: Stillwater, OK, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Cottonwood Community Center Association

    EIN 933584056 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Court Supervision Services Inc

    EIN 863585770 · Headquarters: STILLWATER, OK, USA · Crime & Legal Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Covenant Community School Inc

    EIN 043710436 · Headquarters: STILLWATER, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Cowboy Athletics Inc

    EIN 020669448 · Headquarters: STILLWATER, OK, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Cowboy Canyon Foundation

    EIN 862824179 · Headquarters: Stillwater, OK, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Cowboy Kids Club Inc

    EIN 882470468 · Headquarters: Stillwater, OK, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  79. Cowboy Wrestling Club

    EIN 921624576 · Headquarters: STILLWATER, OK, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990

  80. Cowboys with Compassion - Inc

    EIN 270282748 · Headquarters: Stillwater, OK, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  81. CRUSH Stillwater Volleyball Club

    EIN 473182583 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  82. Curriculum Instruction and Assessment -Cia-

    EIN 731472878 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Dancer Foundation

    EIN 200966458 · Headquarters: STILLWATER, OK, USA · Arts, Culture & Humanities · Latest available filing year: 2020 · Primary form: IRS Form 990-PF

  84. Daran Johnson Ministries

    EIN 844481461 · Headquarters: Stillwater, OK, US · Public & Societal Benefit · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  85. Delta Alumni Association of Kappa Kappa Psi

    EIN 320830304 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Delta Iota Alumni Association of Kappa Kappa Psi

    EIN 332355589 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Delta Kappa Gamma Society

    EIN 736109575 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  88. Delta Sigma House Corp of Kappa Kappa Gamma

    EIN 730966189 · Headquarters: Stillwater, OK, USA · Education · Latest available filing year: 2013 · Primary form: IRS Form 990

  89. Delta Sigma Phi Fraternity Inc

    EIN 371582395 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  90. Delta Tau Delta Fraternity

    EIN 736102355 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Demolay International

    EIN 237396100 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Department of Oklahoma Ladies Auxiliary to the Vfw Inc

    EIN 270194142 · Headquarters: Stillwater, OK, US · Public & Societal Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  93. Diamond Point Preservation Association

    EIN 731480933 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Diamond Valley Community Center

    EIN 736104280 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Downtown Stillwater Association

    EIN 832552340 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  96. Dragon Stables Equine Center Inc

    EIN 850546929 · Headquarters: Stillwater, OK, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Drummond Family Foundation

    EIN 611829707 · Headquarters: STILLWATER, OK, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  98. Early Childhood Coalition Inc

    EIN 821754192 · Headquarters: STILLWATER, OK, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  99. Elite Repeat Serving Stillwater Inc

    EIN 412037712 · Headquarters: Stillwater, OK, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  100. Epsilon Gamma Alumni Association of Kappa Kappa Psi

    EIN 991005295 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

All pages