Unknown & Unclassified nonprofits in Ohio

Unknown & Unclassified nonprofits in Ohio. Browse 26,579 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. Olde Gahanna Sanctuary

    EIN 311003257 · Headquarters: GAHANNA, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  2. Olde Pickerington Village Business

    EIN 311504684 · Headquarters: Pickerington, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Olde River Yacht Club Condominium

    EIN 341647522 · Headquarters: CLEVELAND, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  4. Olde West Chester Christmas Walk

    EIN 823714056 · Headquarters: West Chester, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  5. Oldies but Goodies

    EIN 311273540 · Headquarters: milford, OH, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  6. Olentangy Braves Little League Inc

    EIN 461120365 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Olentangy Cricket Club

    EIN 812781763 · Headquarters: Lewis Center, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  8. Olentangy Teachers' Association

    EIN 311019022 · Headquarters: HILLIARD, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Olentangy View Condominium Association

    EIN 412238763 · Headquarters: Delaware, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Olga Kohut Sebulsky Charitable Trst

    EIN 346904084 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  11. Olin Family Foundation

    EIN 341725337 · Headquarters: RICHFIELD, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  12. Olive Branch Initiative

    EIN 814787373 · Headquarters: Akron, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Olive Branch Messenger Tours

    EIN 311030967 · Headquarters: Carlisle, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  14. Olive Lodge 210 F & Am

    EIN 832844406 · Headquarters: SARAHSVILLE, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  15. Olive Smith Schlorship Foundation

    EIN 341925537 · Headquarters: Steubenville, OH, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-PF

  16. Olivet Housing & Community Development Corporation

    EIN 341428128 · Headquarters: CLEVELAND, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  17. Olivias Grace

    EIN 371847097 · Headquarters: Girard, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Olmsted All Pro Dad

    EIN 832134698 · Headquarters: Olmsted Falls, OH, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  19. Olmsted Falls Academic Boosters

    EIN 995069904 · Headquarters: Olmsted Falls, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  20. Olmsted Falls Education Association

    EIN 341609544 · Headquarters: Olmsted Falls, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Olmsted Falls Endowment and Alumni

    EIN 341642301 · Headquarters: Olmsted Falls, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Olmsted Falls Masquers & Forensics Patrons

    EIN 455456490 · Headquarters: Strongsville, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Olmsted Falls Professional Firefighters Local 2373

    EIN 237454367 · Headquarters: Olmsted Falls, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Olmsted Historical Society

    EIN 237419903 · Headquarters: OLMSTED FALLS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  25. Olney Friends School Inc

    EIN 340235480 · Headquarters: Barnesville, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Oltmanns Ann Tuw Fbo Olqp

    EIN 386846036 · Headquarters: CINCINNATI, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  27. Omega Chapter of Alpha Gamma Delta Fraternity

    EIN 346557909 · Headquarters: AKRON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  28. Omega Chi Epsilon Chemical Engineering Honor Society

    EIN 237185330 · Headquarters: Toledo, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Omega Global Development Inc

    EIN 863432717 · Headquarters: Cleveland, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  30. Omega International Social Service

    EIN 800590906 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  31. Omega Nu Tau Sorority Inc

    EIN 316086434 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  32. Omega Psi Phi Franternity

    EIN 853863975 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Omega Psi Phi Franternity

    EIN 854319355 · Headquarters: AKRON, OH, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  34. Omega Psi Phi Fraternity

    EIN 311295329 · Headquarters: Canton, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Omega Psi Phi Fraternity

    EIN 316067882 · Headquarters: DAYTON, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Omega Psi Phi Fraternity Inc Iota Psi Chapter

    EIN 020599811 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  37. Omega Psi Phi Fraternity Xi Iota Iota Omega Psi Psi

    EIN 912025725 · Headquarters: LIMA, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  38. Omega Xi of Kappa Delta Education Fund

    EIN 310913807 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Omicron Deuteron Association Attn Tony Zimmerman

    EIN 316042438 · Headquarters: FREMONT, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Omicron Deuteron House Corporation of Kappa Kappa Gamma Fraternity

    EIN 421355884 · Headquarters: Dublin, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Omicron Kappa Upsilon Honorary Dental Society

    EIN 311080819 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Omicron Kappa Upsilon-honorary Dental Society

    EIN 237156869 · Headquarters: CLEVELAND, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. On a Mission to Manhood

    EIN 262021667 · Headquarters: Akron, OH, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  44. On Leong Chinese Merchants Assn

    EIN 346554561 · Headquarters: Cleveland, OH, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  45. Oncology Nursing Society

    EIN 300072270 · Headquarters: Shelby, OH, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  46. Oncology Nursing Society

    EIN 521251921 · Headquarters: Maumee, OH, US · Unknown & Unclassified · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  47. One Columbus

    EIN 812792186 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  48. One Good Deed Journey

    EIN 844762169 · Headquarters: ZANESVILLE, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  49. One Hundred Percent Inc

    EIN 472627916 · Headquarters: PERRYSBURG, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. One Minute for the World

    EIN 861283370 · Headquarters: Oxford, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. One Ohio

    EIN 800904657 · Headquarters: Akron, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  52. One Person One Vote

    EIN 921444573 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  53. Onix Outreach

    EIN 472112999 · Headquarters: LAKEWOOD, OH, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  54. Only Imagine Foundation Ltd

    EIN 461214482 · Headquarters: Blue Ash, OH, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  55. Ontario High School Booster Club

    EIN 341429672 · Headquarters: ONTARIO, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. Ontario Parents for Academic Achievement

    EIN 341556738 · Headquarters: Mansfield, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Onycha Chapter 222 International Mason and Order of Eastern Stars

    EIN 471794413 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  58. Opeiu Local 1794

    EIN 341327154 · Headquarters: ROCKY RIVER, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Opeiu Local 792

    EIN 341364988 · Headquarters: ELYRIA, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  60. Open Data Cincy

    EIN 463866678 · Headquarters: Cincinnati, OH, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  61. Open Door Food Pantry Inc

    EIN 311030456 · Headquarters: Hamilton, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. Open Gate Garden Club

    EIN 800550823 · Headquarters: London, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Open Path Garden Club Madison County

    EIN 263805674 · Headquarters: Plain City, OH, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  64. Open Road Path Inc

    EIN 842617148 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Open Waters Math & Science Center Inc

    EIN 471389126 · Headquarters: Massillon, OH, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  66. Open Your Heart Inc

    EIN 310818997 · Headquarters: CHILLICOTHE, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Operation Feed Corp

    EIN 854120810 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Operation Give Back

    EIN 900155844 · Headquarters: CINCINNATI, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Operation Grant

    EIN 862101443 · Headquarters: Wyoming, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  70. Operation Hope 22 Inc

    EIN 851867176 · Headquarters: Youngstown, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Operation Spirit 4 Troops

    EIN 852125016 · Headquarters: Zanesville, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Operation Support Youth

    EIN 991972547 · Headquarters: Cleveland, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Operative Plasterers & Cement Masons Local Union 109

    EIN 340443775 · Headquarters: NORTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  74. Operative Plasterers and Cement Masons Local 132

    EIN 311612066 · Headquarters: DAYTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Operative Plasterers and Cement Masons Local 886

    EIN 344409630 · Headquarters: TOLEDO, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Operative Plasterers' & Cement Masons' International Assoc Local No 404

    EIN 340308363 · Headquarters: CLEVELAND, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Opp Philip Ochr

    EIN 346568288 · Headquarters: BROOKLYN, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  78. Opportunity City

    EIN 810718231 · Headquarters: COLUMBUS, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Opportunity City Foundation

    EIN 810735626 · Headquarters: COLUMBUS, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Opportunity City Political Action Committee

    EIN 871935716 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  81. Opticians Association of Ohio

    EIN 346571415 · Headquarters: LOVELAND, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  82. Optimist Club Foundation

    EIN 341242928 · Headquarters: CORTLAND, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  83. Optimist Club Kettering Dor Wood Ohio Db Dba the Dor-wood Optimist Club

    EIN 316064624 · Headquarters: KETTERING, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Optimist Club of Fairfield Oh

    EIN 316061438 · Headquarters: FAIRFIELD, OH, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  85. Optimist International

    EIN 237010502 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  86. Optimist International

    EIN 237032818 · Headquarters: Windsor, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Optimist International

    EIN 237402393 · Headquarters: Toledo, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Optimist International

    EIN 237424599 · Headquarters: Strongsville, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. Optimist International

    EIN 237455503 · Headquarters: Piqua, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  90. Optimist International

    EIN 300117196 · Headquarters: Springboro, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  91. Optimist International

    EIN 300941315 · Headquarters: Bellbrook, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Optimist International

    EIN 311068747 · Headquarters: Worthington, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  93. Optimist International

    EIN 311094466 · Headquarters: Tipp City, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Optimist International

    EIN 311255115 · Headquarters: Centerville, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  95. Optimist International

    EIN 311276263 · Headquarters: Kettering, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Optimist International

    EIN 311343939 · Headquarters: Dayton, OH, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  97. Optimist International

    EIN 316049344 · Headquarters: Pickerington, OH, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  98. Optimist International

    EIN 316050644 · Headquarters: DAYTON, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  99. Optimist International

    EIN 316056312 · Headquarters: Brookville, OH, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. Optimist International

    EIN 316060850 · Headquarters: Englewood, OH, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

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