Organizations
Largest first
By revenue on the last return. Organizations that file Form 990-N report no figures and come last.
| Organization | Return | Revenue |
|---|---|---|
| Western Reserve Land ConservancyMoreland Hills | Form 990 | $32,032,869FY2025 |
| Institute for Energy Economics and Financial Analysis IncValley City | Form 990 | $15,100,200FY2025 |
| West Creek ConservancyParma | Form 990 | $13,886,400FY2024 |
| Cincinnati Nature Center AssociationMilford | Form 990 | $10,827,008FY2024 |
| Holden ArboretumKirtland | Form 990 | $10,550,732FY2025 |
| Southern Ohio Diversification InitiativePiketon | Form 990 | $9,532,873FY2025 |
| Cleveland Botanical GardenCleveland | Form 990 | $9,211,305FY2025 |
| Appalachia Ohio AllianceColumbus | Form 990 | $7,713,657FY2024 |
| Conservancy for Cuyahoga Valley National ParkPeninsula | Form 990 | $6,264,820FY2025 |
| Cardinal Land Conservancy IncLoveland | Form 990 | $6,048,900FY2025 |
| Columbus Region Green FundColumbus | Form 990 | $5,696,267FY2024 |
| Friends of the ConservatoryColumbus | Form 990 | $4,894,914FY2024 |
| Hamilton Parks ConservancyHamilton | Form 990 | $4,403,615FY2024 |
| Environmental Health Watch IncCleveland | Form 990 | $4,034,955FY2025 |
| Ohio Environmental CouncilColumbus | Form 990 | $3,783,748FY2025 |
| Joy Outdoor Education Center Foundation IncClarksville | Form 990 | $3,716,049FY2025 |
| Black Swamp ConservancyPemberville | Form 990 | $3,564,187FY2025 |
| Great Parks ForeverCincinnati | Form 990 | $3,549,855FY2025 |
| Little Miami ConservancyLoveland | Form 990 | $3,315,403FY2024 |
| Secore International IncCanton | Form 990 | $3,164,670FY2024 |
| Athens-Hocking County Recycling Centers IncAthens | Form 990 | $3,122,658FY2024 |
| Glen Helen AssociationYellow Springs | Form 990 | $3,010,404FY2025 |
| Horticultural Research Institute Endowment Fund IncColumbus | Form 990 | $2,990,252FY2024 |
| Cleveland Water AllianceCleveland | Form 990 | $2,968,200FY2024 |
| Keep Cincinnati Beautiful IncCincinnati | Form 990 | $2,396,241FY2025 |
| United Plant SaversRutland | Form 990 | $2,270,269FY2024 |
| Shaker Lakes Regional Nature CenterCleveland | Form 990 | $1,905,519FY2025 |
| Wilderness Center IncWilmot | Form 990 | $1,836,512FY2025 |
| Green UmbrellaCincinnati | Form 990 | $1,833,363FY2024 |
| Gallia County Land Reutilization CorporationGallipolis | Form 990 | $1,451,386FY2025 |
| Mill Creek AllianceReading | Form 990 | $1,422,970FY2024 |
| Winous Point Marsh ConservancyPort Clinton | Form 990 | $1,344,444FY2024 |
| Gorman Heritage Farm FoundationCincinnati | Form 990 | $1,191,612FY2024 |
| The Ohio Water Environment AssociationColumbus | Form 990 | $1,167,182FY2024 |
| Build Trades FoundationIndependence | Form 990 | $1,144,590FY2025 |
| Operator Training Committee of Ohio IncSpringfield | Form 990 | $1,126,098FY2024 |
| Henry County Land Reutilization CorporationNapoleon | Form 990 | $1,109,977FY2025 |
| River Rangers International IncHeath | Form 990 | $1,087,686FY2025 |
| Three Valley Conservation TrustOxford | Form 990 | $1,081,846FY2024 |
| Black Environmental Leaders AssociationSolon | Form 990 | $1,079,075FY2024 |
| Beaver Creek Wetlands Association IncAlpha | Form 990 | $1,058,854FY2025 |
| Logan Theater IncLogan | Form 990 | $954,451FY2024 |
| Toussaint River Watershed ConservancyWestlake | Form 990 | $932,111FY2024 |
| Columbiana County Agricultural SocietyLisbon | Form 990 | $900,469FY2025 |
| Power a Clean Future OhioColumbus | Form 990 | $885,510FY2025 |
| Athens ConservancyAthens | Form 990 | $879,322FY2024 |
| Cylinder CollectiveWorthington | Form 990 | $876,591FY2025 |
| Keep Akron BeautifulAkron | Form 990 | $840,415FY2024 |
| Preservation Parks FoundationSunbury | Form 990 | $817,139FY2025 |
| Tecumseh Land Preservation AssociationYellow Springs | Form 990 | $816,342FY2024 |
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