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. Ohio State University The

    EIN 922816436 · Headquarters: Enon, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Ohio State University The

    EIN 923061145 · Headquarters: Malaga, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Ohio State University The

    EIN 923090794 · Headquarters: New Carlisle, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Ohio State University The

    EIN 923177040 · Headquarters: Lewisville, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. Ohio State University The

    EIN 923479506 · Headquarters: Lancaster, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Ohio State University The

    EIN 923711993 · Headquarters: Senecaville, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  7. Ohio State University Varsity 0 Alumni Society

    EIN 811502369 · Headquarters: COLUMBUS, OH, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  8. Ohio State University Young Scholar Program Alumni Society

    EIN 471867310 · Headquarters: CINCINNATI, OH, USA · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  9. Ohio State Universtiy Alumni

    EIN 911824688 · Headquarters: Westerville, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  10. Ohio Statewide Development Corp

    EIN 311088697 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. Ohio Steel Council

    EIN 452663084 · Headquarters: MARION, OH, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  12. Ohio Steel Stingers

    EIN 320753238 · Headquarters: Oxford, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  13. Ohio Student Activist Network

    EIN 923814977 · Headquarters: Hilliard, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  14. Ohio Swimming Inc

    EIN 311016588 · Headquarters: OXFORD, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Ohio Swiss Cheese Association Inc

    EIN 340658772 · Headquarters: SUGARCREEK, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  16. Ohio Swiss Festival Inc

    EIN 237109809 · Headquarters: Sugarcreek, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. Ohio Tactical Officers Association Inc

    EIN 311201128 · Headquarters: Cleveland, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Ohio Tau Chapter of Sigma Alpha Epsilon Fraternity

    EIN 833782624 · Headquarters: EVANSTON, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. Ohio Taxpayers Association

    EIN 811208106 · Headquarters: Mount Vernon, OH, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  20. Ohio Teachers of English to Speakers of Other Languages

    EIN 310920941 · Headquarters: CANAL WINCHESTER, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. Ohio Teamsters Credit Union Inc

    EIN 340681819 · Headquarters: INDEPENDENCE, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Ohio Teamsters Strike Fund Inc

    EIN 341783058 · Headquarters: VALLEY VIEW, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Ohio Technology and Engineering Educators Association

    EIN 237147786 · Headquarters: Youngstown, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  24. Ohio Telecom Association

    EIN 314270390 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Ohio Theta Chapter Pi Beta Phi House Corporation

    EIN 341516427 · Headquarters: Perrysburg, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Ohio Theta House Corporation of Sigma Alpha Epsilon

    EIN 463898364 · Headquarters: Bexley, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  27. Ohio Thoracic Society

    EIN 371651271 · Headquarters: NEW YORK, NY, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  28. Ohio Thoroughbred Breeders & Owners

    EIN 316049009 · Headquarters: JEROMESVILLE, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Ohio Tire & Automotive Assn Inc

    EIN 341212809 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Ohio Tourism Foundation Inc

    EIN 205524835 · Headquarters: COLUMBUS, OH, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  31. Ohio Township Association

    EIN 310628234 · Headquarters: BLACKLICK, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Ohio Township Volunteer Fire Company of Allegheny County

    EIN 251633728 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Ohio Trade Council Inc

    EIN 432036134 · Headquarters: CLEVELAND, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  34. Ohio Travel Association Inc

    EIN 341259550 · Headquarters: PICKERINGTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. Ohio Tri County Sports Officials Association

    EIN 472370800 · Headquarters: MEDINA, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Ohio Troopers Caring

    EIN 311197113 · Headquarters: GAHANNA, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  37. Ohio Trucking Association

    EIN 314268450 · Headquarters: WESTERVILLE, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Ohio Turf & Golf Trust

    EIN 900653486 · Headquarters: Centerville, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  39. Ohio Turfgrass Foundation

    EIN 237052063 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  40. Ohio Two-cylinder Club

    EIN 272584586 · Headquarters: West Salem, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Ohio Underground Circuit

    EIN 920913366 · Headquarters: Dayton, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Ohio United 4 America

    EIN 821992805 · Headquarters: Powell, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Ohio University

    EIN 316402113 · Headquarters: ATHENS, OH, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-T

  44. Ohio University Alumni Chapter of Fairfield County Ohio

    EIN 311314231 · Headquarters: Lancaster, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  45. Ohio University PAD Prelaw Chapter

    EIN 943103911 · Headquarters: TOWSON, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Ohio University Womens Club

    EIN 346538987 · Headquarters: North Royalton, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Ohio University Womens Club

    EIN 371655262 · Headquarters: Athens, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Ohio Urban Community Action Network

    EIN 311297181 · Headquarters: WORTHINGTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Ohio Urological Society Inc

    EIN 341691517 · Headquarters: EAST DUNDEE, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  50. Ohio Utilities Protection Service

    EIN 341270505 · Headquarters: NORTH JACKSON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Ohio Valley American Legion Post 760

    EIN 346607365 · Headquarters: HANNIBAL, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  52. Ohio Valley Blind Association Inc

    EIN 351685280 · Headquarters: CORYDON, IN, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  53. Ohio Valley Branch of the International Dyslexia Association

    EIN 311033260 · Headquarters: CINCINNATI, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Ohio Valley Business and Professional Women

    EIN 472766371 · Headquarters: Steubenville, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  55. Ohio Valley Business Association I

    EIN 351592982 · Headquarters: DUBLIN, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  56. Ohio Valley Chapter American Theatre Organ Society

    EIN 316079454 · Headquarters: CINCINNATI, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Ohio Valley Chapter of Ohio Association of School Business Off

    EIN 831442519 · Headquarters: Batavia, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Ohio Valley Chapter of the Community Association Institute

    EIN 311443309 · Headquarters: DAYTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  59. Ohio Valley Chapter of the North American Rock Garden Society Inc

    EIN 800591639 · Headquarters: Franklin, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Ohio Valley Choral Festival Association

    EIN 351699685 · Headquarters: CLARKSVILLE, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Ohio Valley Christian Camp Inc

    EIN 610911818 · Headquarters: Hardin, KY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Ohio Valley Christian Youth Camp Inc

    EIN 921301371 · Headquarters: LITTLE HOCKNG, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Ohio Valley Conference Inc

    EIN 620693124 · Headquarters: BRENTWOOD, TN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. Ohio Valley Construction Education Foundation

    EIN 311366629 · Headquarters: SPRINGBORO, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  65. Ohio Valley Construction Employers Council Inc

    EIN 550396032 · Headquarters: WHEELING, WV, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Ohio Valley Experimenters Club

    EIN 813033125 · Headquarters: Overpeck, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  67. Ohio Valley Farm Analysis Group Inc

    EIN 616031637 · Headquarters: HENDERSON, KY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Ohio Valley Forestry Fellowship

    EIN 311004515 · Headquarters: CINCINNATI, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Ohio Valley Foundation Fifth Third Bank

    EIN 316008508 · Headquarters: CINCINNATI, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  70. Ohio Valley French Bulldog Club

    EIN 811933067 · Headquarters: Louisville, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Ohio Valley Goodwill Industries

    EIN 310554062 · Headquarters: Cincinnati, Ohio, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. Ohio Valley Health Care Alliance In

    EIN 464378993 · Headquarters: LOUISVILE, KY, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  73. Ohio Valley Industrial and Business Development Corporation

    EIN 550461336 · Headquarters: WHEELING, WV, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  74. Ohio Valley Irish Red White Setter Club

    EIN 452386879 · Headquarters: waterford, OH, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  75. Ohio Valley Iron Ducks

    EIN 814729228 · Headquarters: Wheeling, WV, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  76. Ohio Valley Karting Association

    EIN 316081769 · Headquarters: Camden, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  77. Ohio Valley Labor Management Cooperation Corporation Inc

    EIN 651234661 · Headquarters: MONROE, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  78. Ohio Valley Lines Inc

    EIN 251487483 · Headquarters: Ambridge, PA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Ohio Valley Local Education Association

    EIN 311132223 · Headquarters: Peebles, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Ohio Valley Majestic Brass

    EIN 844056598 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  81. Ohio Valley N a R I

    EIN 311470851 · Headquarters: CENTERVILLE, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  82. Ohio Valley Officials Association- Basketball

    EIN 311106951 · Headquarters: Cleves, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Ohio Valley Quilters Guild

    EIN 311038262 · Headquarters: CINCINNATI, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Ohio Valley Railcars Inc

    EIN 341829084 · Headquarters: North Canton, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Ohio Valley Real Estate Management Association

    EIN 465087680 · Headquarters: Evansville, IN, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  86. Ohio Valley Region PCA Inc

    EIN 311101957 · Headquarters: Hamilton, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. Ohio Valley Region Sports Car Club of America Inc

    EIN 310946335 · Headquarters: LEWIS CENTER, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  88. Ohio Valley Rowing Club

    EIN 550674322 · Headquarters: Parkersburg, WV, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Ohio Valley Search and Rescue Dog Association

    EIN 351938658 · Headquarters: Evansville, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Ohio Valley Section of the Association for Diagnostics And

    EIN 311101343 · Headquarters: Wyoming, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Ohio Valley Ski Council Inc

    EIN 310928066 · Headquarters: Beavercreek, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Ohio Valley Society of Plastic Surgeons

    EIN 204578285 · Headquarters: NORTH RIDGEVILLE, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  93. Ohio Valley Teen Challenge Inc

    EIN 341313938 · Headquarters: YOUNGSTOWN, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Ohio Valley Trail Partners

    EIN 640951292 · Headquarters: Wheeling, WV, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  95. Ohio Valley Vigilantes Cowboy Club Inc

    EIN 341859604 · Headquarters: Powell, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Ohio Valley YMCA

    EIN 340714794 · Headquarters: EAST LIVERPOOL, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. Ohio Vegetable & Small Fruit Research & Development Program

    EIN 311399530 · Headquarters: FRAZEYSBURG, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  98. Ohio Venture Association

    EIN 341434174 · Headquarters: Cleveland, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  99. Ohio Veterinary Medical Association

    EIN 314425770 · Headquarters: POWELL, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Ohio Vision Foundation

    EIN 346575500 · Headquarters: Geneva, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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