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 Progressive Collaborative

    EIN 822146860 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  2. Ohio Prolife Action Inc

    EIN 453581925 · Headquarters: Gallipolis, OH, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  3. Ohio Promenade Corporation

    EIN 464745814 · Headquarters: New Richmond, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Ohio Promotional Products Assoc

    EIN 341515106 · Headquarters: AKRON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  5. Ohio Propane Gas Association

    EIN 310801375 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  6. Ohio Prosperity Initiative

    EIN 271697961 · Headquarters: Solon, OH, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  7. Ohio Provider Resource Association

    EIN 311559921 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Ohio Psychiatric Physicians Association

    EIN 346558859 · Headquarters: DUBLIN, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Ohio Psychiatric Physicians Foundation

    EIN 316181034 · Headquarters: DUBLIN, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  10. Ohio Psychological Association

    EIN 310833663 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. Ohio Public Interest Research Group Inc

    EIN 341165210 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  12. Ohio Public Radio Inc

    EIN 311314329 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  13. Ohio Public Transit Association

    EIN 237094806 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  14. Ohio Pumpkin Festival

    EIN 341192841 · Headquarters: BARNESVILLE, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  15. Ohio Quarter Horse Association

    EIN 341034161 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. Ohio Railroad Association

    EIN 316402243 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. Ohio Ralik Ratak Aid

    EIN 921051337 · Headquarters: CELINA, OH, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  18. Ohio Randonneurs

    EIN 931899345 · Headquarters: Canton, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  19. Ohio Ready Mixed Concrete Associati

    EIN 314271235 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  20. Ohio Realtors Charitable & Educational Foundation

    EIN 310998071 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  21. Ohio Recorders Association

    EIN 311351642 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  22. Ohio Recreational Sports Association

    EIN 341501724 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Ohio Region Classic Car Club of America

    EIN 311304289 · Headquarters: CHAGRIN FALLS, OH, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  24. Ohio Region of the Antique Automobile Club of America

    EIN 453634578 · Headquarters: Ashtabula, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Ohio Renal Association C/o Diane Wish President

    EIN 341773402 · Headquarters: SHAKER HEIGHTS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  26. Ohio Restaurant Association

    EIN 314271670 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Ohio Retired Teacher Foundation

    EIN 316050636 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Ohio Retirement For Teachers Association Inc

    EIN 310566151 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  29. Ohio River Four Wheelers

    EIN 852536075 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Ohio River Launch Club

    EIN 310397355 · Headquarters: Cincinnati, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  31. Ohio River Road Runners Club

    EIN 310907357 · Headquarters: Beavercreek, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  32. Ohio River Sternwheel Festival Inc

    EIN 311005854 · Headquarters: MARIETTA, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  33. Ohio River Valley Chapter of the Risk and Insurance Management Soci

    EIN 311369576 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Ohio River Valley Council of the Boy Scouts of America

    EIN 550357014 · Headquarters: WHEELING, WV, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. Ohio River Valley Llama Association

    EIN 311331285 · Headquarters: r, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Ohio River Valley Lodge No 231 BPO Elks of the USA

    EIN 341314445 · Headquarters: Martins Ferry, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  37. Ohio Roofing Contractors' Association

    EIN 311172285 · Headquarters: DAYTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  38. Ohio Rubber Group Inc

    EIN 421749594 · Headquarters: BATH, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  39. Ohio Rural Electric Cooperatives Inc

    EIN 510174617 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Ohio Rural Letter Carriers' Association

    EIN 237235345 · Headquarters: DELLROY, Ohio, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Ohio Rural Water Association

    EIN 310917953 · Headquarters: ZANESVILLE, OH, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  42. Ohio Sad Sacks

    EIN 273668608 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  43. Ohio Safe and Healthy Communities Campaign

    EIN 823215606 · Headquarters: YOUNGSTOWN, OH, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  44. Ohio Safeguards Inc

    EIN 311140554 · Headquarters: Fairfield Township, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  45. Ohio Saint Bernard Club Inc

    EIN 237117001 · Headquarters: BROADVIEW HTS, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Ohio Savings Charitable Foundation

    EIN 237055858 · Headquarters: AURORA, OH, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-PF

  47. Ohio School Boards Association

    EIN 314414897 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Ohio School Boards Association Legal Assistance Fund

    EIN 310934576 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Ohio School Bus Mechanics Association

    EIN 311333076 · Headquarters: GAHANNA, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  50. Ohio School for the Deaf Alumni Association

    EIN 314384475 · Headquarters: WESTERVILLE, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Ohio School for the Deaf Foundation Inc

    EIN 863674253 · Headquarters: Worthington, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  52. Ohio School Speech Pathology Educational Audiology Coalition Inc

    EIN 341743294 · Headquarters: NORTH ROYALTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Ohio Seed Improvement Association

    EIN 314379745 · Headquarters: CROTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  54. Ohio Self Determination Association

    EIN 311367252 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. Ohio Self-Insurers Association

    EIN 510138930 · Headquarters: Cleveland, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  56. Ohio Sheep Improvement Association

    EIN 311351374 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. Ohio Shoulder & Elbow Surgeons Association Inc

    EIN 933819990 · Headquarters: Pickerington, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  58. Ohio Sickle Cell Health Association Inc

    EIN 310968012 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Ohio Simmental Association Inc

    EIN 346675241 · Headquarters: West Salem, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  60. Ohio Skating Association The

    EIN 341325323 · Headquarters: Mayfield Heights, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Ohio SMART

    EIN 341893336 · Headquarters: Cleveland, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Ohio Soccer Association - North

    EIN 341544519 · Headquarters: NORTHFIELD, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  63. Ohio Society Daughters of the American Revolution

    EIN 346597457 · Headquarters: Philo, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. Ohio Society for Respiratory Care

    EIN 341250302 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  65. Ohio Society for the Prevention of Cruelty to Animals

    EIN 311077151 · Headquarters: GROVE CITY, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Ohio Society Inc

    EIN 316147577 · Headquarters: Goshen, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  67. Ohio Society of Anesthesiologists Inc

    EIN 340866225 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  68. Ohio Society of Association Professionals

    EIN 311006124 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Ohio Society of Certified Public Accountants

    EIN 314378053 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. Ohio Society of Health System Pharmacists

    EIN 311387450 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  71. Ohio Society of Oral Surgeons

    EIN 237279762 · Headquarters: DUBLIN, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  72. Ohio Society of Pathologists Inc

    EIN 346555679 · Headquarters: Mayfield Heights, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Ohio Society of Professional Engineers

    EIN 314350044 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. Ohio Solid Organ Transplantation Consortium

    EIN 311143811 · Headquarters: SPRINGFIELD, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  75. Ohio Solid Organ Transplantation Consortium

    EIN 311397404 · Headquarters: Springfield, OH, United States · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  76. Ohio Southeast Enterprise Development Fund Inc

    EIN 311413241 · Headquarters: ATHENS, OH, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  77. Ohio Soybean Association

    EIN 237167474 · Headquarters: WORTHINGTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  78. Ohio Soybean Council

    EIN 311291213 · Headquarters: WORTHINGTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. Ohio Special Needs Trust Coalition Inc

    EIN 203999873 · Headquarters: Worthington, OH, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  80. Ohio Speech Language Hearing Assn

    EIN 316083820 · Headquarters: GERMANTOWN, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Ohio Squirrels Water Polo Club

    EIN 261796142 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  82. Ohio State Alumni Association Inc

    EIN 931564728 · Headquarters: Colorado Springs, CO, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Ohio State Alumni Club of Naples

    EIN 800257357 · Headquarters: Naples, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Ohio State Assoc Nurse Anesthetist

    EIN 346540987 · Headquarters: WORTHINGTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  85. Ohio State Association of Plumbing- Heating-cooling Contractors Inc

    EIN 340707601 · Headquarters: CHAGRIN FALLS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Ohio State Association of the National Campers & Hikers Assn

    EIN 237202138 · Headquarters: Olmsted Falls, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Ohio State Bar Association

    EIN 314271520 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Ohio State Beekeepers Association Inc

    EIN 341779506 · Headquarters: Jefferson, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  89. Ohio State Beekeepers Association Inc

    EIN 474680936 · Headquarters: New Bremen, OH, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  90. Ohio State Beekeepers Association Inc

    EIN 821104527 · Headquarters: Shelby, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Ohio State Beekeepers Association Inc

    EIN 823160685 · Headquarters: Chagrin Falls, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  92. Ohio State Beekeepers Association Inc

    EIN 830787767 · Headquarters: Pleasant Plain, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Ohio State Beekeepers Association Inc Group

    EIN 830536372 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Ohio State Building and Construction Trades Council

    EIN 314271527 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Ohio State Chapter of Delta Waterfowl Foundation

    EIN 994904981 · Headquarters: Bismarck, ND, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Ohio State Chiropractic Association

    EIN 237123957 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. Ohio State Coroners Association

    EIN 237180376 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  98. Ohio State Council Knights of Columbus

    EIN 237211961 · Headquarters: FAIRFIELD, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Ohio State Delta Phi Lambda Sorority Inc

    EIN 841739464 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  100. Ohio State Dental Faculty Practice Inc - John R Kalmar Dmd Phd

    EIN 311203750 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

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