| Lancaster Gales Baseball Extra Innings ClubLancaster | Form 990-EZ | $40,514FY2026 |
| Northwestern All-Sports AssociationWest Salem | Form 990-EZ | $40,044FY2025 |
| Passion and ProfessionCanfield | Form 990-N | No figure |
| Millridge Parent Teacher GroupHighland Heights | Form 990-EZ | $39,835FY2025 |
| Bexley Womans ClubColumbus | Form 990-EZ | $39,537FY2025 |
| Blacklick Elementary Pride Partners PTOBlacklick | Form 990-N | No figure |
| Lulac Ohio Educational FoundationCincinnati | Form 990-N | No figure |
| Parent Booster USA IncChardon | Form 990-N | No figure |
| Music Teachers National Association IncJohnstown | Form 990-N | No figure |
| Parent-Teacher Organization of the Jefferson Local School DistrictWest Jefferson | Form 990-EZ | $38,831FY2025 |
| Oak Creek Parents and Teachers OrganizationLewis Center | Form 990-EZ | $38,723FY2025 |
| Edgerton Athletic Boosters IncEdgerton | Form 990-EZ | $38,633FY2025 |
| Parent Booster USA IncBrooklyn | Form 990-EZ | $38,421FY2025 |
| Friends of Max S Hayes Vocational High SchoolLakewood | Form 990-N | No figure |
| Shawnee Elementary Parent Teacher CouncilLima | Form 990-EZ | $38,035FY2025 |
| Medlar View Elementary Parent Teacher OrganizationMiamisburg | Form 990-EZ | $37,806FY2026 |
| Ohio State School for the Blind Parent Teacher Staff FoundationColumbus | Form 990-N | No figure |
| Financial Foundations LegacyShaker Heights | Form 990-N | No figure |
| Darke County College Access ProgramGreenville | Form 990-N | No figure |
| Strausser Parent Teacher GroupMassillon | Form 990-EZ | $37,416FY2025 |
| Charity 6 FoundationAlliance | Form 990-EZ | $37,405FY2025 |
| Grove City High School Njrotc BoostersGrove City | Form 990-N | No figure |
| Riverdale Educational FoundationArlington | Form 990-N | No figure |
| Wickliffe Schools Alumni AssociationWickliffe | Form 990-EZ | $36,933FY2025 |
| Indian Springs Parent Teacher OrganizationPowell | Form 990-EZ | $36,915FY2025 |
| Portage County Retired Teachers Association ScholarshipKent | Form 990-N | No figure |
| Ohio Mining & Mineral Education ProgramGahanna | Form 990-EZ | $36,699FY2025 |
| Danny Parmertor Memorial Fund IncChardon | Form 990-EZ | $36,512FY2025 |
| Bloom-Vernon Elementary PTOSouth Webster | Form 990-EZ | $36,318FY2025 |
| Friends of the Mentor Public LibraryMentor | Form 990-N | No figure |
| Exchange Club Foundation of Springfield OhioSpringfield | Form 990 | $36,065FY2024 |
| Beachwood School FoundationBeachwood | Form 990-N | No figure |
| Columbus Grove Band Boosters IncColumbus Grove | Form 990-EZ | $35,506FY2026 |
| Merry Makers Club Foundation of Columbus IncColumbus | Form 990-EZ | $35,489FY2025 |
| Wayne Trace Performing Arts AssociationHaviland | Form 990-N | No figure |
| Highland Band BoostersMedina | Form 990-N | No figure |
| Lima Fifty-Four Athletic & Scholastic Fund IncLima | Form 990-N | No figure |
| Willowville Elementary PTOBatavia | Form 990-EZ | $35,266FY2025 |
| South Range Music Boosters IncCanfield | Form 990-N | No figure |
| Icasi Scholarship Fund IncChesterland | Form 990-N | No figure |
| Kool Kat ScienceToledo | Form 990-N | No figure |
| Parent Booster USA IncBrooklyn | Form 990-EZ | $34,900FY2024 |
| Crestview Athletic BoostersConvoy | Form 990-N | No figure |
| Ohio Staters IncorporatedColumbus | Form 990-EZ | $34,658FY2025 |
| Lambda Boule FoundationBlacklick | Form 990-N | No figure |
| Dublin Coffman Baseball ClubDublin | Form 990-EZ | $34,398FY2024 |
| Quaker Elementary PTO IncNew Philadelphia | Form 990-EZ | $34,380FY2024 |
| Brecksville-Broadview Heights Band BoostersBroadview Heights | Form 990-N | No figure |
| Columbus Grove Athletic Boosters Club IncColumbus Grove | Form 990-EZ | $34,228FY2024 |
| Paul a Demshar Scholarship FundAshtabula | Form 990-N | No figure |