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. The O'herron Family Foundation

    EIN 133244207 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  2. The O'neal Foundation Inc

    EIN 630942856 · Headquarters: BIRMINGHAM, AL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  3. The O'neill Brothers Foundation C/o Francis Jay O'neill

    EIN 346545084 · Headquarters: CHAGRIN FALLS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  4. The O'shaughnessy Family Foundation

    EIN 431669212 · Headquarters: UXBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  5. The O'shaughnessy-hurst Memorial Foundation Inc

    EIN 541394736 · Headquarters: LEESBURG, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  6. The O'Toole Family Foundation

    EIN 133748068 · Headquarters: Albany, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  7. The O-i Charities Foundation

    EIN 346554560 · Headquarters: PERRYSBURG, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  8. The Oak Foundation for Child Health and Education Inc C/o Sullivan & Worcester

    EIN 043104788 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  9. The Oak Foundation USA C/o Kemnay Advisory Services Inc

    EIN 133321196 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  10. The Oak Lawn Community Library Foundation Inc

    EIN 363880062 · Headquarters: Oak Lawn, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. The Oak Tree and a Rose Foundation Incorporated

    EIN 853651686 · Headquarters: Bowling Green, KY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. The Oak Tree Philanthropic Foundation

    EIN 363779795 · Headquarters: SAN DIEGO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  13. The Oakdale Cemetery Company

    EIN 560343025 · Headquarters: WILMINGTON, NC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. The Oakland Athletics Community Fund

    EIN 942826655 · Headquarters: WEST SACRAMENTO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  15. The Oakland County Sheriffs Office Benefit for the Disabled

    EIN 382754877 · Headquarters: Waterford, MI, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  16. The Oaklawn Foundationinc

    EIN 136127896 · Headquarters: WILTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  17. The Oakleigh Thorne Foundation

    EIN 510243758 · Headquarters: MILLBROOK, NY, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  18. The Oakley Country Club

    EIN 041683805 · Headquarters: WATERTOWN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. The Oaknoll Foundation

    EIN 421363406 · Headquarters: IOWA CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. The Oaks

    EIN 340825929 · Headquarters: North Lawrence, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. The Oaks at Briargrove Preschool Inc

    EIN 760022193 · Headquarters: HOUSTON, TX, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990

  22. The Oaks Country Club

    EIN 730551473 · Headquarters: TULSA, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. The Oaks Country Club Inc

    EIN 640443157 · Headquarters: NEW ALBANY, MS, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. The Oaks Foundation Inc

    EIN 341724387 · Headquarters: SEBRING, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. The Oaks Of Clear Creek Owners Association

    EIN 760372688 · Headquarters: Austin, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  26. The Oaks Water Supply Corporation

    EIN 742682787 · Headquarters: San Antonio, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  27. The Oakwood Club

    EIN 416038908 · Headquarters: Stacy, MN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  28. The Oasis Foundation

    EIN 112620092 · Headquarters: FLUSHING, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  29. The Oasis Project Inc

    EIN 871491055 · Headquarters: WEST HOLLYWOOD, CA, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  30. The Oath Foundation

    EIN 393894241 · Headquarters: Tulsa, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. The Obannon House Preservation Found Inc

    EIN 861880781 · Headquarters: RUSSELLVILLE, KY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. The Obedekah Children Foundation

    EIN 423627668 · Headquarters: Lawrenceville, GA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. The Obernauer Foundation Inc

    EIN 956149147 · Headquarters: HOWARD BEACH, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  34. The Obp Community Fund Inc

    EIN 464898540 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. The Observer

    EIN 362191251 · Headquarters: Rockford, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  36. The Obsidian Society

    EIN 954167541 · Headquarters: Orlando, FL, OC · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  37. The Occoquan Historical Society Inc

    EIN 237060574 · Headquarters: Occoquan, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. The Occupational Rehabilitation Gro

    EIN 042622021 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  39. The Ocd Foundation of Michigan

    EIN 383219854 · Headquarters: Livonia, MI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. The Ocean County Order of the Friendly Sons of the Shillelaghinc

    EIN 844550988 · Headquarters: MANAHAWKIN, NJ, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  41. The Oceanography Society

    EIN 521563085 · Headquarters: Rockville, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. The Octagon House of Camillus Inc

    EIN 133401346 · Headquarters: Camillus, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. The Odd Fellows Cemetery of New Haven Indiana Inc

    EIN 351104315 · Headquarters: New Haven, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. The Odd Fellows Home for the Elderly of North Carolina Inc

    EIN 581341370 · Headquarters: WINSTONSALEM, NC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. The Odessa Fire Company Inc

    EIN 510122202 · Headquarters: ODESSA, DE, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  46. The Odessa Study Club

    EIN 756049477 · Headquarters: Odessa, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. The Odonnell Golf Club

    EIN 951425376 · Headquarters: PALM SPRINGS, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. The Oehmig Foundation

    EIN 760260014 · Headquarters: CHATTANOOGA, TN, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  49. The Oelman Foundation

    EIN 316030862 · Headquarters: VILLAGE OF GOLF, FL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  50. The Office Ergonomics Research Committee

    EIN 043374794 · Headquarters: OGUNQUIT, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  51. The Officer Liquori Tate Memorial Foundation

    EIN 812872287 · Headquarters: Starkville, MS, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  52. The Offices at Lake Pointe

    EIN 205753003 · Headquarters: Houston, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  53. The Offices at Riverstone Owners As

    EIN 900635256 · Headquarters: Houston, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  54. The Offield Family Foundation

    EIN 366066240 · Headquarters: Chicago, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  55. The Ogilvy Foundation

    EIN 133230406 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  56. The Oglethorpe Echo Legacy Inc

    EIN 873098936 · Headquarters: LEXINGTON, GA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  57. The Ohio Art Corridor

    EIN 831343647 · Headquarters: MCCONNELSVLE, OH, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  58. The Ohio Association of Chiefs of Police

    EIN 310801191 · Headquarters: DUBLIN, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. The Ohio Association of Garden Clubs Inc Region 7

    EIN 331181521 · Headquarters: Bucyrus, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. The Ohio Center for Law Related Education

    EIN 311124428 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  61. The Ohio Citizens Committee for the Arts Inc

    EIN 341747342 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. The Ohio Congress of Parents and Teachers

    EIN 314351810 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. The Ohio Council of Behavioral Health & Family Services Providers

    EIN 310951018 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. The Ohio Educational Credit Union Inc

    EIN 340153020 · Headquarters: SEVEN HILLS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. The Ohio Genealogical Society

    EIN 346555678 · Headquarters: BELLVILLE, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. The Ohio Machinery Education and Opportunity Foundation

    EIN 832754692 · Headquarters: BROADVIEW HEIGHTS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  67. The Ohio Masonic Communities

    EIN 900054759 · Headquarters: Springfield, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. The Ohio Masonic Home Albert Hessler Tr

    EIN 046609558 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  69. The Ohio Mayors Alliance

    EIN 813097391 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  70. The Ohio Society of Radiologic Technologist Education and Research Foundati

    EIN 311347892 · Headquarters: Zanesville, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  71. The Ohio Stat University

    EIN 934562922 · Headquarters: Bucyrus, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. The Ohio Stat University

    EIN 990863249 · Headquarters: Gallipolis, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. The Ohio State Univeristy

    EIN 833306461 · Headquarters: TIFFIN, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. The Ohio State Univeristy

    EIN 833361481 · Headquarters: Cortland, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  75. The Ohio State Univeristy

    EIN 833408909 · Headquarters: MOUNT VERNON, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. The Ohio State Univeristy

    EIN 833412398 · Headquarters: Canfield, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. The Ohio State Univeristy

    EIN 833415842 · Headquarters: Lisbon, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. The Ohio State Univeristy

    EIN 833472528 · Headquarters: New Vienna, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  79. The Ohio State Univeristy

    EIN 833486730 · Headquarters: Louisville, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. The Ohio State Univeristy

    EIN 833492915 · Headquarters: TIFFIN, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. The Ohio State Univeristy

    EIN 833494612 · Headquarters: Athens, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. The Ohio State Univeristy

    EIN 833528314 · Headquarters: Mount Gilead, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  83. The Ohio State Univeristy

    EIN 833543459 · Headquarters: Bowling Green, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. The Ohio State Univeristy

    EIN 833550154 · Headquarters: Marysville, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. The Ohio State Univeristy

    EIN 833622063 · Headquarters: Canfield, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. The Ohio State Univeristy

    EIN 833640708 · Headquarters: georgetown, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. The Ohio State Univeristy

    EIN 833702316 · Headquarters: Millersburg, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. The Ohio State Univeristy

    EIN 833705478 · Headquarters: Wooster, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. The Ohio State Univeristy

    EIN 833778804 · Headquarters: Delaware, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. The Ohio State Univeristy

    EIN 833779726 · Headquarters: Gallipolis, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. The Ohio State Univeristy

    EIN 833807224 · Headquarters: Valley City, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  92. The Ohio State Univeristy

    EIN 833822966 · Headquarters: Louisville, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. The Ohio State Univeristy

    EIN 833860949 · Headquarters: Langsville, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. The Ohio State Univeristy

    EIN 833911793 · Headquarters: Newark, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. The Ohio State Univeristy

    EIN 833922948 · Headquarters: Bucyrus, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. The Ohio State Univeristy

    EIN 833956293 · Headquarters: New Vienna, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. The Ohio State Univeristy

    EIN 833986319 · Headquarters: Canfield, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  98. The Ohio State Univeristy

    EIN 834013251 · Headquarters: Marysville, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. The Ohio State Univeristy

    EIN 834029477 · Headquarters: Toledo, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. The Ohio State Univeristy

    EIN 834035534 · Headquarters: Oxford, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

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