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. Epsilon Nu House Corporation

    EIN 061696568 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Equine Savior Corporation

    EIN 202689217 · Headquarters: Stillwater, OK, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  3. Eta Iota Alumni Association of Kappa Kappa Psi

    EIN 931390455 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Faggins Golf Foundation Inc

    EIN 383751424 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  5. Fairlawn Cemetery Association Inc

    EIN 730234080 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Faith Global Medical Missions Inc

    EIN 332252656 · Headquarters: Stillwater, OK, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Faye Allene Rife Brown Foundation

    EIN 731542636 · Headquarters: STILLWATER, OK, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  8. Fifty-one East Water Inc

    EIN 237378221 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Firefighter Challenge Team

    EIN 331941800 · Headquarters: STILLWATER, OK, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Focus Foundation of Stillwater Inc

    EIN 452465600 · Headquarters: Stillwater, OK, US · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Foundation for Engineering at Oklahoma State University Inc

    EIN 261124834 · Headquarters: STILLWATER, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Foundation for the Mcknight Center for the Performing Arts

    EIN 812608656 · Headquarters: STILLWATER, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Fractionation Research Inc

    EIN 730603358 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Frank Pistol Pete Eaton Legacy Foundation

    EIN 920934532 · Headquarters: STILLWATER, OK, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  15. Fraternal Order of Eagles

    EIN 731382644 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. Fraternal Order of Eagles

    EIN 911799572 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  17. Fraternal Order of Police

    EIN 237585703 · Headquarters: Stillwater, OK, US · Mutual & Membership Benefit · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  18. Friends of Multi Arts Center Inc

    EIN 203751210 · Headquarters: STILLWATER, OK, USA · Arts, Culture & Humanities · Latest available filing year: 2014 · Primary form: IRS Form 990-EZ

  19. Friends of Northern Flyer Alliance Inc

    EIN 273699438 · Headquarters: Stillwater, OK, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Friends of Sanborn Nature Camp Inc

    EIN 824498022 · Headquarters: Stillwater, OK, USA · Environment · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  21. Friends of the Stillwater Public Library

    EIN 731192643 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Future Farmers of America

    EIN 731412114 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Future Farmers of America and Its State Associations & Local Chapter

    EIN 510225794 · Headquarters: Stillwater, OK, USA · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Gamma Epsilon Chapter of Alpha Chi Omega Fraternity Inc

    EIN 736104056 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Gamma Phi Beta Foundation

    EIN 731614316 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  26. Gamma Phi Beta Sorority - Beta Psi Chapter

    EIN 736103462 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Gary Dale Morrison Memorial Foundation Inc

    EIN 454035912 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  28. Genealogy Partners of the Stillwater Library

    EIN 881218153 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Georgia Auctioneers Association Inc

    EIN 586075523 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Glenn and Laura Collum Family Foundation

    EIN 813128148 · Headquarters: STILLWATER, OK, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  31. Global Compassion Foundation

    EIN 800669212 · Headquarters: STILLWATER, OK, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  32. Gold Wing Road Riders Association

    EIN 731484755 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  33. Great Plains Canola Association Incorporated

    EIN 260667324 · Headquarters: Stillwater, OK, US · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Great Plains Preservation and Development

    EIN 731437312 · Headquarters: Stillwater, OK, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Greek Neighborhood Association of Stillwater Ok

    EIN 261097353 · Headquarters: STILLWATER, OK, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  36. Greenhaven Cemetery Inc

    EIN 273235794 · Headquarters: Stillwater, OK, US · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Hall of Fame of Womens Oklahoma Golf Association

    EIN 030540202 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  38. Hampton Roads Alumni Association of Kappa Kappa Psi

    EIN 990968247 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Hazel Modella Art Gallery

    EIN 814883800 · Headquarters: STILLWATER, OK, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Health Occupations Students of Okla

    EIN 731031993 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Highlands Latin Cottage School of Stillwater

    EIN 844886587 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  42. Highlands Latin School Stillwater Inc

    EIN 934719604 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Holder Family Foundation Holder

    EIN 201464461 · Headquarters: STILLWATER, OK, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  44. Honor Society of Phi Kappa Phi

    EIN 736097517 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Hospice Quality Care Bell-childers Foundation

    EIN 731552627 · Headquarters: STILLWATER, OK, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Human Resources Section of New and Related Services Division of Oklah

    EIN 991757460 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Independent Order of Odd Fellows

    EIN 237602019 · Headquarters: Stillwater, OK, US · Mutual & Membership Benefit · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  48. Institute of Electrical and Electronics Engineers

    EIN 736103421 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  49. Institute of Industrial Engineers Inc

    EIN 736102891 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  50. International Association for Computer Information Systems

    EIN 941689561 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  51. International Association of Administrative Professionals

    EIN 731583114 · Headquarters: Stillwater, OK, US · Environment · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  52. International Association of Fire Fighters

    EIN 736146839 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  53. International Association of Lions Clubs

    EIN 731323755 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  54. International Reading Association Inc

    EIN 930678514 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  55. International Society of Photosynthesis Research

    EIN 260804449 · Headquarters: STILLWATER, OK, USA · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  56. Iota Mu Alumni Association of Kappa Kappa Psi

    EIN 990969659 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Islamic Society of Stillwater

    EIN 205644860 · Headquarters: Stillwater, OK, United States · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. Izaak Walton League of America Inc

    EIN 731424872 · Headquarters: STILLWATER, OK, US · Environment · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  59. Jaycee Foundation of Oklahoma Inc

    EIN 731166582 · Headquarters: Stillwater, OK, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  60. Judith Karman Hospice Inc

    EIN 731172031 · Headquarters: STILLWATER, OK, USA · Human Services · Latest available filing year: 2015 · Primary form: IRS Form 990

  61. Junior Service League of Stillwater Oklahoma

    EIN 731280248 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  62. K-friends Inc

    EIN 731573804 · Headquarters: Stillwater, OK, US · Youth Development · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  63. Kansas Auctioneers Association

    EIN 481043175 · Headquarters: STILLWATER, OK, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  64. Kappa Alpha Order Beta Xi Chapter

    EIN 731387764 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  65. Kappa Alpha Theta Fraternity

    EIN 736118923 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Kappa Delta Sorority - Nu Oklahoma State University

    EIN 730598596 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Kappa Delta Sorority Nu Chapter Corp Board

    EIN 731279346 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Kappa Gamma Chapter of Tau Beta Sigma

    EIN 932202220 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Kappa Kappa Psi

    EIN 932921559 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Kappa Kappa Psi - Nu Chi Chapter

    EIN 990867548 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Kappa Kappa Psi - Nu Omicron Chapter

    EIN 990779612 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Kappa Kappa Psi - Nu Pi Chapter

    EIN 990799744 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Kappa Kappa Psi - Nu Psi Chapter

    EIN 990829589 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Kappa Kappa Psi - Nu Rho Chapter

    EIN 990825666 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Kappa Kappa Psi - Nu Sigma Chapter

    EIN 990939267 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Kappa Kappa Psi - Nu Upsilon Chapter

    EIN 990670525 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Kappa Kappa Psi - Nu Xi Chapter

    EIN 990751149 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Kappa Kappa Psi - Xi Alpha Chapter

    EIN 990765206 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Kappa Kappa Psi - Xi Beta Chapter

    EIN 990737597 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Kappa Kappa Psi - Xi Delta

    EIN 934309765 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Kappa Kappa Psi - Xi Eta Chapter

    EIN 991237405 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Kappa Kappa Psi - Xi Gamma Chapter

    EIN 990686170 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Kappa Kappa Psi - Xi Iota Chapter

    EIN 332572208 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Kappa Kappa Psi - Xi Theta

    EIN 331757522 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Kappa Kappa Psi - Xi Zeta Chapter

    EIN 934338253 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Kappa Kappa Psi Fraternity

    EIN 232012022 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  87. Kappa Kappa Psi Fraternity

    EIN 232012091 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  88. Kappa Kappa Psi Fraternity

    EIN 232012093 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  89. Kappa Kappa Psi Fraternity

    EIN 237270185 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  90. Kappa Kappa Psi Fraternity

    EIN 251308740 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  91. Kappa Kappa Psi Fraternity

    EIN 251308741 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  92. Kappa Kappa Psi Fraternity

    EIN 421295213 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  93. Kappa Kappa Psi Fraternity

    EIN 510202081 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  94. Kappa Kappa Psi Fraternity

    EIN 510202083 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  95. Kappa Kappa Psi Fraternity

    EIN 510202085 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  96. Kappa Kappa Psi Fraternity

    EIN 510202086 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  97. Kappa Kappa Psi Fraternity

    EIN 510202087 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  98. Kappa Kappa Psi Fraternity

    EIN 510202088 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  99. Kappa Kappa Psi Fraternity

    EIN 510202089 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  100. Kappa Kappa Psi Fraternity

    EIN 510202091 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

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