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. Society of Professional Journalists

    EIN 731384129 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  2. Society of Women Engineers

    EIN 461368092 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  3. Southern Kansas Brittany Club

    EIN 393394697 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Spectrum Perspectives

    EIN 933880371 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  5. Stillwater Agriculture Boosters

    EIN 841729796 · Headquarters: Stillwater, OK, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Stillwater Amateur Radio Club

    EIN 823132639 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Stillwater Area Human Resource Association

    EIN 352459767 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Stillwater Area Sports Association

    EIN 463006271 · Headquarters: STILLWATER, OK, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Stillwater Association of Insurance and Financial Advisors

    EIN 731506904 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  10. Stillwater Bicycling Association

    EIN 271272644 · Headquarters: Stillwater, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  11. Stillwater Board of Realtors

    EIN 730947964 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Stillwater Business & Professional Womens Club

    EIN 731015186 · Headquarters: STILLWATER, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  13. Stillwater Car Club

    EIN 301226438 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Stillwater Cares

    EIN 273331134 · Headquarters: Stillwater, OK, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Stillwater Chamber of Commerce

    EIN 730470095 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Stillwater Chapt 1368 Women of the Moose

    EIN 731129339 · Headquarters: stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Stillwater Christian School Inc

    EIN 320020147 · Headquarters: STILLWATER, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Stillwater Christian Services Inc

    EIN 731341145 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Stillwater Community Band

    EIN 731405208 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Stillwater Community Center Foundation

    EIN 743026977 · Headquarters: Stillwater, OK, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990

  21. Stillwater Community Health Center

    EIN 731502192 · Headquarters: STILLWATER, OK, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990

  22. Stillwater Community Singers Inc

    EIN 731467432 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  23. Stillwater Country Club Inc

    EIN 731023031 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Stillwater Delta Tau Delta Corp

    EIN 731101672 · Headquarters: Stillwater, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Stillwater Domestic Violence

    EIN 731097811 · Headquarters: STILLWATER, OK, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Stillwater Family Young Mens Christian Association Foundation

    EIN 731350883 · Headquarters: STILLWATER, OK, USA · Human Services · Latest available filing year: 2021 · Primary form: IRS Form 990-PF

  27. Stillwater Firefighters Foundation

    EIN 991780137 · Headquarters: Stillwater, OK, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Stillwater Foundation for Progress

    EIN 731072926 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Stillwater Generals Baseball

    EIN 833915089 · Headquarters: STILLWATER, OK, US · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Stillwater Girls Incorporated

    EIN 730778865 · Headquarters: Stillwater, OK, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Stillwater Group Homes Inc

    EIN 731163767 · Headquarters: STILLWATER, OK, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Stillwater Habitat for Humanity Inc

    EIN 731371689 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Stillwater High School Alumni

    EIN 731416615 · Headquarters: STILLWATER, OK, US · Education · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  34. Stillwater High School Cheer Boosters

    EIN 262821104 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Stillwater High School Museum Inc

    EIN 731503082 · Headquarters: STILLWATER, OK, US · Arts, Culture & Humanities · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  36. Stillwater High School Soccer Booster Club

    EIN 832311909 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Stillwater High School Softball Booster Club

    EIN 471224930 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  38. Stillwater High Student Activity Foundation Endowment

    EIN 262103628 · Headquarters: STILLWATER, OK, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990

  39. Stillwater Home Builders Association Inc

    EIN 731132928 · Headquarters: Stillwater, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  40. Stillwater Honor Choir

    EIN 522364814 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  41. Stillwater Housing Development Corporation

    EIN 731360030 · Headquarters: Stillwater, OK, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. Stillwater Industrial Foundation Inc

    EIN 736098379 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Stillwater Interfaith Counseling Center

    EIN 731544869 · Headquarters: STILLWATER, OK, USA · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  44. Stillwater Jefferson White Cloud Foundation

    EIN 731505954 · Headquarters: Stillwater, OK, USA · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  45. Stillwater Life Services Inc

    EIN 731323487 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  46. Stillwater Literacy Council

    EIN 731355973 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Stillwater Lodge 2089 Msc Loyal Order of Moose

    EIN 730739303 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Stillwater Masonic Building Association

    EIN 730587980 · Headquarters: Stillwater, OK, US · Housing & Shelter · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Stillwater Medical Foundation Inc

    EIN 731173571 · Headquarters: STILLWATER, OK, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Stillwater Middle School Pto

    EIN 920633318 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Stillwater Mineral and Gem Society Inc

    EIN 392075592 · Headquarters: Stillwater, OK, US · Science & Technology · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  52. Stillwater Mobile Meals Inc

    EIN 731337911 · Headquarters: STILLWATER, OK, USA · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990

  53. Stillwater MOH Inc

    EIN 850884908 · Headquarters: Stillwater, OK, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Stillwater Museum Association Inc

    EIN 731337370 · Headquarters: Stillwater, OK, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  55. Stillwater Pioneer Athlete Memorial Inc

    EIN 731527642 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Stillwater Pioneer Band Boosters

    EIN 271199428 · Headquarters: Stillwater, OK, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Stillwater Pioneer Booster Club Inc

    EIN 731265597 · Headquarters: STILLWATER, OK, USA · Education · Latest available filing year: 2019 · Primary form: IRS Form 990

  58. Stillwater Pioneers Boys Basketball Booster Club

    EIN 853777737 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Stillwater Public Education Foundation

    EIN 731267401 · Headquarters: STILLWATER, OK, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Stillwater Rebels Inc

    EIN 823381917 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  61. Stillwater Rifle & Pistol Club Inc

    EIN 731155201 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Stillwater Rotary Club % Steven Cundiff

    EIN 736102792 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  63. Stillwater Sister School Exchange Booster

    EIN 334221215 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Stillwater Soccer Association Inc

    EIN 731545903 · Headquarters: Stillwater, OK, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Stillwater Stars Gymnastics Booster Club Inc

    EIN 371490271 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  66. Stillwater Stix Baseball Association

    EIN 880829787 · Headquarters: Stillwater, OK, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  67. Stillwater Tennis Association

    EIN 731457304 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Stillwater Touchdown Club

    EIN 205447019 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Stillwater Youth Baseball Association Inc

    EIN 731402506 · Headquarters: STILLWATER, OK, US · Recreation & Sports · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  70. Stillwater Youth Football & Cheer Association

    EIN 833687597 · Headquarters: Stillwater, OK, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Stillwonder Inc

    EIN 923355715 · Headquarters: Stillwater, OK, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990

  72. Stix Foundation

    EIN 824405538 · Headquarters: Stillwater, OK, US · Human Services · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  73. Support Staff Section of the New & Related Services of the Ok Assoc

    EIN 900248345 · Headquarters: STILLWATER, OK, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Supporting Stillwater Homeschoolers

    EIN 274570401 · Headquarters: STILLWATER, OK, US · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  75. Tau Beta Pi Association Inc

    EIN 237357350 · Headquarters: STILLWATER, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Tau Beta Pi Association Inc

    EIN 823572970 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Tau Beta Sigma

    EIN 900587553 · Headquarters: Stillwater, OK, US · Mental Health & Crisis Intervention · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  78. Tau Beta Sigma

    EIN 900587559 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  79. Tau Beta Sigma

    EIN 900587563 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  80. Tau Beta Sigma

    EIN 900587567 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  81. Tau Beta Sigma

    EIN 900587572 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  82. Tau Beta Sigma

    EIN 900587576 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  83. Tau Beta Sigma - Iota Omega Chapter

    EIN 990554636 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Tau Beta Sigma -Iota Chi Chapter

    EIN 990606313 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Tau Beta Sigma Honoary Sorority

    EIN 912115705 · Headquarters: Stillwater, OK, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  86. Tau Beta Sigma Hononary Band Sorority

    EIN 510215657 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  87. Tau Beta Sigma Honorary Band Sorority

    EIN 510215649 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  88. Tau Beta Sigma Honorary Band Sorority

    EIN 510215653 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  89. Tau Beta Sigma Honorary Band Sorority

    EIN 510215656 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  90. Tau Beta Sigma Honorary Band Sorority

    EIN 510215658 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  91. Tau Beta Sigma Honorary Band Sorority

    EIN 510215659 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  92. Tau Beta Sigma Honorary Band Sorority

    EIN 510215660 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  93. Tau Beta Sigma Honorary Band Sorority

    EIN 510215662 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  94. Tau Beta Sigma Honorary Band Sorority

    EIN 510215664 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  95. Tau Beta Sigma Honorary Band Sorority

    EIN 510215665 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  96. Tau Beta Sigma Honorary Band Sorority

    EIN 510215666 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  97. Tau Beta Sigma Honorary Band Sorority

    EIN 510227946 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  98. Tau Beta Sigma Honorary Band Sorority

    EIN 510227955 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  99. Tau Beta Sigma Honorary Band Sorority

    EIN 730593479 · Headquarters: STILLWATER, OK, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  100. Tau Beta Sigma Honorary Band Sorority

    EIN 731006757 · Headquarters: Stillwater, OK, US · Arts, Culture & Humanities · Latest available filing year: 2013 · Primary form: IRS Form 990-N

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