| Hope in the Hills IncorporatedHuntington | Form 990 | $5,173,395FY2025 |
| SkytruthShepherdstown | Form 990 | $3,932,279FY2025 |
| Oglebay InstituteWheeling | Form 990 | $3,134,143FY2025 |
| West Virginia Land Trust IncCharleston | Form 990 | $3,072,841FY2024 |
| National Center for Electronics RecylingParkersburg | Form 990 | $2,977,973FY2024 |
| Appalachian Headwaters IncLewisburg | Form 990 | $2,781,159FY2024 |
| Friends of the Cheat IncKingwood | Form 990 | $2,533,033FY2024 |
| Canaan Valley Institute IncDavis | Form 990 | $2,217,184FY2025 |
| West Virginia Rivers Coalition IncCharleston | Form 990 | $1,943,638FY2025 |
| Appalachian Mountain Advocates IncLewisburg | Form 990 | $1,427,958FY2024 |
| West Virginia Botanic Garden IncMorgantown | Form 990 | $874,180FY2024 |
| Cacapon and Lost Rivers Land TR IncCapon Bridge | Form 990 | $814,419FY2025 |
| US Research Impact Alliance CorpMorgantown | Form 990 | $778,930FY2024 |
| Friends of Blackwater IncThomas | Form 990 | $689,806FY2024 |
| Potomac Valley Audubon Society IncShepherdstown | Form 990 | $582,956FY2025 |
| West Virginia Association of Conservation Districts IncSutton | Form 990 | $364,077FY2025 |
| West Virginia Forestry AssociationCharleston | Form 990 | $319,441FY2025 |
| National Watershed CoalitionDellslow | Form 990 | $264,827FY2026 |
| Coal River Mountain WatchNaoma | Form 990 | $258,672FY2024 |
| Friends of the National Conservation Training Center BFWSShepherdstown | Form 990 | $215,794FY2025 |
| Wind Dance Farm & Earth EducationcenterBerkeley Springs | Form 990 | $208,507FY2025 |
| Friends of Deckers CreekDellslow | Form 990 | $208,060FY2024 |
| Izaak Walton League of America IncMartinsburg | Form 990 | $182,610FY2025 |
| Yew Mountain CenterHillsboro | Form 990-EZ | $171,890FY2024 |
| Appalachian ExpeditionsDavis | Form 990-EZ | $167,611FY2024 |
| Greenbrier Valley Restoration Project IncorporatedLewisburg | Form 990 | $156,721FY2024 |
| Piney Creek Watershed Association IncBeckley | Form 990-EZ | $152,076FY2024 |
| Coal River Group IncSaint Albans | Form 990-EZ | $135,872FY2025 |
| Fayette County Education Fund IncorporatedOak Hill | Form 990-EZ | $126,105FY2024 |
| Izaak Walton League of America IncElkins | Form 990 | $121,178FY2025 |
| Aurora LightsMorgantown | Form 990-EZ | $101,507FY2024 |
| Coonskin Park FoundationCharleston | Form 990-EZ | $94,702FY2025 |
| Energy Efficient West VirginiaCharleston | Form 990-EZ | $89,772FY2024 |
| Northern Panhandle Conservation District Foundation IncMcMechen | Form 990 | $74,413FY2024 |
| Emma Scott Garden ClubElkins | Form 990-EZ | $58,482FY2025 |
| Institute for Earth EducationGreenville | Form 990-EZ | $58,027FY2025 |
| Recycling Coalition of West Virginia IncCharleston | Form 990-EZ | $54,037FY2025 |
| Little Kanawha Resource Conservation & Development ProjectParkersburg | Form 990-EZ | $53,246FY2024 |
| Lincoln County Farmland ProtectionHamlin | Form 990-EZ | $51,872FY2025 |
| Forks of Coal State Natural Area Foundation IncCharleston | Form 990-N | No figure |
| Buckhannon River Watershed Association IncBuckhannon | Form 990-N | No figure |
| Buffalo Creek Watershed IncAmherstdale | Form 990-N | No figure |
| Davis Creek Watershed Association IncCharleston | Form 990-N | No figure |
| Guardians of the Westfork WatershedMount Clare | Form 990-N | No figure |
| Sylvester Pavilion Park IncSylvester | Form 990-N | No figure |
| Madison Wildwood Garden ClubMadison | Form 990-N | No figure |
| Fourpole Creek Watershed AssociationHuntington | Form 990-N | No figure |
| West Virginia Garden Collaborative IncMorgantown | Form 990-N | No figure |
| Morris Creek Watershed Association IncMontgomery | Form 990-N | No figure |
| Wood County Master Gardeners Association IncParkersburg | Form 990-N | No figure |