Unknown & Unclassified nonprofits

Unknown & Unclassified nonprofits. Browse 557,756 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. Ossian Volunteer Firemen Inc

    EIN 351754024 · Headquarters: OSSIAN, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Ossining Association of Administrators and Supervisors

    EIN 263822302 · Headquarters: OSSINING, NY, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  3. Ossining Chamber of Commerce

    EIN 131723792 · Headquarters: Ossining, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  4. Ossining Community Tennis Association Inc

    EIN 760760097 · Headquarters: OSSINING, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. Ossining Police Athletic League Inc

    EIN 134184150 · Headquarters: OSSINING, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  6. Ossining Special Education PTA

    EIN 334528509 · Headquarters: OSSINING, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Ossipee Childrens Fund Inc

    EIN 020459771 · Headquarters: Center Ossipee, NH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  8. Ossipee Lake Association

    EIN 262874130 · Headquarters: East Waterboro, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Ossipee Mountaineers Snowmobile Club

    EIN 453658910 · Headquarters: East Waterboro, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Osso Ovch Axp

    EIN 316056680 · Headquarters: XENIA, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  11. Ost Foundation

    EIN 453459664 · Headquarters: KEIZER, OR, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  12. Ostara Folk School Inc

    EIN 921374297 · Headquarters: VALDERS, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Osteopathic Foundation of West Mi

    EIN 382841014 · Headquarters: NORTON SHORES, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Osteopathic Physicians & Surgeons of California

    EIN 952117017 · Headquarters: SACRAMENTO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Osteopathic Physicians & Surgeons of Oregon

    EIN 936025596 · Headquarters: PORTLAND, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. Oster for Columbus High Sch

    EIN 396283072 · Headquarters: MILWAUKEE, WI, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-PF

  17. Oster Sinisi Family Foundation Inc

    EIN 223188305 · Headquarters: ENGLEWOOD, NJ, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  18. Osterhout Free Library

    EIN 240795971 · Headquarters: WILKESBARRE, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. Osterhus Publishing House Inc

    EIN 410462260 · Headquarters: ROBBINSDALE, MN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Ostern S Char

    EIN 846187154 · Headquarters: SAINT LOUIS, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  21. Osterud Winter Foundation

    EIN 411790061 · Headquarters: ROCHESTER, MN, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  22. Osterville Free Library Corporation

    EIN 042128454 · Headquarters: OSTERVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Osterville Historical Society Inc

    EIN 046113382 · Headquarters: OSTERVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Osterville Mens Club

    EIN 237059706 · Headquarters: CENTERVILLE, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Osterville Veterans Association Inc

    EIN 042077326 · Headquarters: OSTERVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  26. Ostlin Education Foundation Trust

    EIN 421244546 · Headquarters: EAGAN, MN, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  27. Ostomy Association of Oklahoma City Inc

    EIN 510150140 · Headquarters: Oklahonma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Ostomy Association of Sonoma County

    EIN 237399231 · Headquarters: Santa Rosa, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Ostomy Association of Southern New Jersey

    EIN 770661234 · Headquarters: PT CHARLOTTE, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Ostomy Association Orange County Association

    EIN 237429295 · Headquarters: Orange, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Ostrander Firemens Relief Assn

    EIN 411364233 · Headquarters: Ostrander, MN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Ostrem Hatleli Family Association

    EIN 472940793 · Headquarters: Rugby, ND, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  33. Ostrovsky Family Fund Inc C/o John Voinski Deloitte Tax Llp

    EIN 133389580 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  34. Osu Chapter of College of Psychiatric and Neurologic Pharmac

    EIN 814570952 · Headquarters: COLUMBUS, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  35. Osu Chapter of Sigma Xi

    EIN 264447854 · Headquarters: Philomath, OR, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  36. OSU Hillel

    EIN 311048567 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. Osu Kappa Parents Club Inc

    EIN 994250955 · Headquarters: Edmond, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Osu Society for Veterinary Surgery & Anesthesiology

    EIN 463583103 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  39. Osu Student Chapter of American Association of Feline Practitioner

    EIN 994251750 · Headquarters: Stillwater, OK, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Osukirk

    EIN 413350081 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Osuna Di Team

    EIN 264588250 · Headquarters: Albuquerque, NM, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  42. Oswald and Sophia Bathalter Trust C/o Dewitt Bank & Trust Co

    EIN 421368307 · Headquarters: DEWITT, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  43. Oswald Cemetery Inc

    EIN 262802553 · Headquarters: CLIFTON, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Oswald Chambers Foundation

    EIN 942819071 · Headquarters: Monterey, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Oswalt Academy PTSA

    EIN 953892780 · Headquarters: Walnut, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  46. Oswayo Valley Educational Support Professtionals Association

    EIN 611574194 · Headquarters: SHINGLEHOUSE, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Oswayo Valley Historical Society Inc

    EIN 251361484 · Headquarters: SHINGLEHOUSE, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Oswayo Valley Music Boosters

    EIN 462515722 · Headquarters: Shinglehouse, PA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Oswayo Valley Teachers Association

    EIN 272690442 · Headquarters: Shinglehouse, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Oswegatchie Development Corporation

    EIN 161346188 · Headquarters: HEUVELTON, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Oswegatchie School Organization

    EIN 061055804 · Headquarters: Waterford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Oswego Bears Youth Football and Cheer Nfp

    EIN 451744705 · Headquarters: MONTGOMERY, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  53. Oswego Chapter 2157 Women of the Moose

    EIN 912000290 · Headquarters: Mooseheart, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  54. Oswego Classroom Teachers Assoc Benefit Fund

    EIN 222177796 · Headquarters: FAYETTEVILLE, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. Oswego Classroom Teachers Association

    EIN 237363861 · Headquarters: OSWEGO, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  56. Oswego Community Center

    EIN 474215343 · Headquarters: Warsaw, IN, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  57. Oswego Country Club

    EIN 150408150 · Headquarters: OSWEGO, NY, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  58. Oswego County Bar Association

    EIN 166056605 · Headquarters: OSWEGO, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. Oswego County Rlc Auxiliary

    EIN 364627371 · Headquarters: Oswego, NY, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  60. Oswego County Sunset Group Inc

    EIN 275038827 · Headquarters: OSWEGO, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Oswego Harbor Festivals Inc

    EIN 161348741 · Headquarters: OSWEGO, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. Oswego Historical Society

    EIN 480786626 · Headquarters: OSWEGO, KS, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  63. Oswego Lake Country Club

    EIN 930244260 · Headquarters: LAKE OSWEGO, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. Oswego Little League Inc

    EIN 161562256 · Headquarters: OSWEGO, NY, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  65. Oswego Masonic Charities Corp

    EIN 222482437 · Headquarters: Phoenix, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  66. Oswego Pioneer Cemetery Association

    EIN 930730941 · Headquarters: Lake Oswego, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  67. Oswego Players

    EIN 161307464 · Headquarters: OSWEGO, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Oswego Rural Water Company

    EIN 570752860 · Headquarters: SUMTER, SC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Oswego Servicemens Club Inc

    EIN 480525203 · Headquarters: Oswego, KS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Oswego Valley Modelaires Inc

    EIN 161594701 · Headquarters: Fulton, NY, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  71. Oswego Womens Bowling Hall of Fame

    EIN 383836505 · Headquarters: Oswego, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Oswegoland Fishin Fools Inc

    EIN 200548222 · Headquarters: Oswego, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Oswegoland Heritage Association

    EIN 362867783 · Headquarters: Oswego, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Osyka Cemetery Association

    EIN 640682282 · Headquarters: Osyka, MS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Ot Autry Vocational and Technical Educational Foundation

    EIN 731353799 · Headquarters: ENID, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Ot Translation Project Kiche

    EIN 923300063 · Headquarters: Stacy, MN, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  77. Otay Mesa Chamber of Commerce

    EIN 330278802 · Headquarters: San Diego, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Otay Ranch One Community Association

    EIN 330847057 · Headquarters: San Diego, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  79. Otay Service Corporation

    EIN 330588922 · Headquarters: Spring Valley, CA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  80. OTEC Communication Company

    EIN 341392920 · Headquarters: Ottoville, OH, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  81. Otero County Association of Realtors Inc

    EIN 850281349 · Headquarters: ALAMOGORDO, NM, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. Otero County Economic Development Council

    EIN 850304073 · Headquarters: ALAMOGORDO, NM, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  83. Otero County Electric Cooperative, Inc.

    EIN 850058679 · Headquarters: Cloudcroft, NM, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Otero County Electric Education Foundation

    EIN 850374112 · Headquarters: CLOUDCROFT, NM, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  85. Otero County Farm Bureau Inc

    EIN 850116105 · Headquarters: WEED, NM, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Otero County Law Enforcement Appreciation

    EIN 814795376 · Headquarters: LA LUZ, NM, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Otero County Lulac

    EIN 990579335 · Headquarters: Tularosa, NM, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Otero County Youth Soccer Association Ocysa

    EIN 850281582 · Headquarters: ALAMOGORDO, NM, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  89. Otero Ditch Company

    EIN 840433772 · Headquarters: ROCKY FORD, CO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  90. Oterostem

    EIN 465186427 · Headquarters: tularosa, NM, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Otha H Grimes Foundation

    EIN 731293858 · Headquarters: TULSA, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  92. Othella & Tesah Housecenter Incorporated

    EIN 475537068 · Headquarters: sacramento, CA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  93. Othello Community Scholarship Fund

    EIN 237432381 · Headquarters: Othello, WA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Othello Country Club Water Association

    EIN 911019815 · Headquarters: Othello, WA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  95. Othello Education Association Inc

    EIN 911192108 · Headquarters: Othello, WA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Othello Fair Association

    EIN 264519627 · Headquarters: OTHELLO, WA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  97. Othello Ffa Boosters

    EIN 460982720 · Headquarters: othello, WA, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  98. Othello Music Booster Club

    EIN 911470174 · Headquarters: Othello, WA, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  99. Other Guys Law Enforcement Motorcycle Club Inc

    EIN 364813191 · Headquarters: Little Suamico, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Other Mothers Animal Rescue and Rehabilitation Inc

    EIN 203202807 · Headquarters: Portland, OR, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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