Data / Nonprofits / Ohio / Environment
Environment nonprofits in Ohio: 720 registered with the IRS
720 environment nonprofits are registered with the IRS in Ohio, 691 of them 501(c)(3) charities; the 242 that report revenue took in $262.2 million. The most are in Columbus (64), Cincinnati (64), Cleveland (30). The largest by revenue: Western Reserve Land Conservancy ($32 million), Institute for Energy Economics and Financial Analysis Inc ($15.1 million), Holden Arboretum Trust ($14.4 million).
SpecStream is the live web data engine for teams and agents. It reads the IRS register of exempt organizations as the IRS updates it, and this page is that reading. Ask for the nonprofits you need by place, cause and size, with their latest Form 990 figures and websites, and they arrive in your sheet, CRM, Slack or agent.
The 500 largest by revenue
| Organization | City | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Western Reserve Land Conservancy | Moreland HLS | 501(c)(3) | 1996 | $32 million | $38.7 million | 2025-06 |
| Institute for Energy Economics and Financial Analysis Inc | Valley City | 501(c)(3) | 2013 | $15.1 million | $11.1 million | 2025-12 |
| Holden Arboretum Trust | Brooklyn | 501(c)(3) | 1988 | $14.4 million | $76.7 million | 2025-09 |
| West Creek Conservancy | Parma | 501(c)(3) | 2000 | $13.9 million | $7.8 million | 2024-12 |
| Cincinnati Nature Center Association | Milford | 501(c)(3) | 1965 | $10.8 million | $78.2 million | 2024-12 |
| Holden Arboretum | Kirtland | 501(c)(3) | 1953 | $10.6 million | $214.5 million | 2025-09 |
| Southern Ohio Diversification Initiative | Piketon | 501(c)(3) | 2000 | $9.5 million | $2.4 million | 2025-09 |
| Cleveland Botanical Garden | Cleveland | 501(c)(3) | 1937 | $9.2 million | $33.6 million | 2025-09 |
| Appalachia Ohio Alliance | Columbus | 501(c)(3) | 2002 | $7.7 million | $53.3 million | 2024-12 |
| Conservancy for Cuyahoga Valley National Park | Peninsula | 501(c)(3) | 2000 | $6.3 million | $10.3 million | 2025-08 |
| Cardinal Land Conservancy Inc | Loveland | 501(c)(3) | 2000 | $6 million | $25.8 million | 2025-09 |
| Columbus Region Green Fund | Columbus | 501(c)(3) | 2025 | $5.7 million | $8.7 million | 2024-12 |
| Friends of the Conservatory | Columbus | 501(c)(3) | 2000 | $4.9 million | $11.3 million | 2024-12 |
| Hamilton Parks Conservancy | Hamilton | 501(c)(3) | 2016 | $4.4 million | $2.3 million | 2024-12 |
| Environmental Health Watch Inc | Cleveland | 501(c)(3) | 1984 | $4 million | $4 million | 2025-03 |
| Ohio Environmental Council | Columbus | 501(c)(3) | 1972 | $3.8 million | $4.2 million | 2025-06 |
| Joy Outdoor Education Center Foundation Inc | Clarksville | 501(c)(3) | 1951 | $3.7 million | $9.1 million | 2025-12 |
| Black Swamp Conservancy | Pemberville | 501(c)(3) | 1994 | $3.6 million | $15.9 million | 2025-06 |
| Great Parks Forever | Cincinnati | 501(c)(3) | 2008 | $3.5 million | $26.2 million | 2025-12 |
| Little Miami Conservancy | Loveland | 501(c)(3) | 1967 | $3.3 million | $11.4 million | 2024-12 |
| Capital Crossroads Spec Improvement District of Columbia Inc | Columbus | 501(c)(4) | 2001 | $3.2 million | $1.2 million | 2025-12 |
| Secore International Inc | Canton | 501(c)(3) | 2016 | $3.2 million | $3.1 million | 2024-12 |
| Athens-Hocking County Recycling Centers Inc | Athens | 501(c)(3) | 1992 | $3.1 million | $2.3 million | 2024-12 |
| Glen Helen Association | Yellow SPGS | 501(c)(3) | 1979 | $3 million | $12.3 million | 2025-06 |
| Horticultural Research Institute Endowment Fund Inc | Columbus | 501(c)(3) | 1976 | $3 million | $23.6 million | 2024-12 |
| Cleveland Water Alliance | Cleveland | 501(c)(3) | 2013 | $3 million | $2.8 million | 2024-12 |
| Keep Cincinnati Beautiful Inc | Cincinnati | 501(c)(3) | 1979 | $2.4 million | $3.5 million | 2025-06 |
| United Plant Savers | Rutland | 501(c)(3) | 1996 | $2.3 million | $2.8 million | 2024-12 |
| Shaker Lakes Regional Nature Center | Cleveland | 501(c)(3) | 1966 | $1.9 million | $7.8 million | 2025-08 |
| Wilderness Center Inc | Wilmot | 501(c)(3) | 1964 | $1.8 million | $19.3 million | 2025-06 |
| Green Umbrella | Cincinnati | 501(c)(3) | 2002 | $1.8 million | $534,240 | 2024-12 |
| Gallia County Land Reutilization Corporation | Gallipolis | 501(c)(3) | 2025 | $1.5 million | $628,756 | 2025-12 |
| Mill Creek Alliance | Reading | 501(c)(3) | 1997 | $1.4 million | $816,493 | 2024-12 |
| Natural Areas Land Conservancy | Moreland HLS | 501(c)(3) | 2005 | $1.4 million | $1.4 million | 2025-06 |
| Winous Point Marsh Conservancy | Port Clinton | 501(c)(3) | 1999 | $1.3 million | $6.1 million | 2024-12 |
| Ohio Environmental Council Action Fund Inc | Columbus | 501(c)(4) | 2019 | $1.3 million | $947,200 | 2025-06 |
| Summit Metro Parks Foundation | Akron | 501(c)(3) | 1993 | $1.2 million | $11.3 million | 2025-12 |
| Gorman Heritage Farm Foundation | Cincinnati | 501(c)(3) | 2004 | $1.2 million | $2.9 million | 2024-12 |
| The Ohio Water Environment Association | Columbus | 501(c)(3) | 1977 | $1.2 million | $1.3 million | 2024-12 |
| Build Trades Foundation | Independence | 501(c)(3) | 2014 | $1.1 million | $1.8 million | 2025-12 |
| Operator Training Committee of Ohio Inc | Springfield | 501(c)(3) | 1967 | $1.1 million | $223,608 | 2024-12 |
| Henry County Land Reutilization Corporation | Napoleon | 501(c)(3) | 2018 | $1.1 million | $94,642 | 2025-12 |
| River Rangers International Inc | Heath | 501(c)(3) | 2019 | $1.1 million | $77,433 | 2025-12 |
| Three Valley Conservation Trust | Oxford | 501(c)(3) | 1996 | $1.1 million | $5.8 million | 2024-12 |
| Black Environmental Leaders Association | Solon | 501(c)(3) | 2020 | $1.1 million | $329,214 | 2024-12 |
| Beaver Creek Wetlands Association Inc | Alpha | 501(c)(3) | 1988 | $1.1 million | $3.4 million | 2025-12 |
| Logan Theater Inc | Logan | 501(c)(3) | 2019 | $954,451 | $7.2 million | 2024-12 |
| Toussaint River Watershed Conservancy | Westlake | 501(c)(3) | 2021 | $932,111 | $1.4 million | 2024-12 |
| Columbiana County Agricultural Society | Lisbon | 501(c)(3) | 2017 | $900,469 | $3.2 million | 2025-11 |
| Power A Clean Future Ohio | Columbus | 501(c)(3) | 2024 | $885,510 | $2.4 million | 2025-12 |
| Athens Conservancy | Athens | 501(c)(3) | 2003 | $879,322 | $6.5 million | 2024-12 |
| Cylinder Collective | Worthington | 501(c)(3) | 2024 | $876,591 | $1 million | 2025-12 |
| Keep Akron Beautiful | Akron | 501(c)(3) | 1981 | $840,415 | $846,501 | 2024-12 |
| Preservation Parks Foundation | Sunbury | 501(c)(3) | 2018 | $817,139 | $1.4 million | 2025-12 |
| Tecumseh Land Preservation Association | Yellow SPGS | 501(c)(3) | 1991 | $816,342 | $2.7 million | 2024-12 |
| Civic Garden Center of Greater Cincinnati | Cincinnati | 501(c)(3) | 1950 | $795,372 | $1.4 million | 2025-12 |
| Owl Creek Conservancy | Mount Vernon | 501(c)(3) | 2000 | $760,212 | $4.5 million | 2025-12 |
| Friends of Aullwood Inc | Dayton | 501(c)(3) | 1979 | $721,575 | $4.7 million | 2025-06 |
| Doan Brook Watershed Partnership | Cleveland | 501(c)(3) | 2003 | $719,452 | $583,004 | 2025-12 |
| Ret 3 Job Corp Inc | Cleveland | 501(c)(3) | 2003 | $686,887 | $269,493 | 2025-12 |
| Green Columbus | Columbus | 501(c)(3) | 2008 | $683,191 | $386,249 | 2025-12 |
| Ohio State Parks Foundation | Columbus | 501(c)(3) | 2022 | $675,940 | $285,837 | 2025-06 |
| Friends of Medina County Parks Inc | Medina | 501(c)(3) | 1997 | $659,074 | $6.6 million | 2024-12 |
| Cold Creek Foundation | Castalia | 501(c)(3) | 2019 | $650,735 | $1.4 million | 2025-12 |
| Greater Ohio Policy Center Inc | Columbus | 501(c)(3) | 2008 | $648,706 | $645,377 | 2025-12 |
| Botanical Garden Association Inc | Alliance | 501(c)(3) | 2002 | $632,585 | $825,019 | 2024-12 |
| Cincinnati Recycling and Reuse Hub | Cincinnati | 501(c)(3) | 2020 | $631,952 | $299,104 | 2024-12 |
| Reuse Centers | Cincinnati | 501(c)(3) | 2025 | $596,427 | $208,585 | 2025-12 |
| Brukner Nature Center | Troy | 501(c)(3) | 1969 | $589,681 | $3.9 million | 2024-12 |
| Citizens Utility Board of Ohio | Lakewood | 501(c)(3) | 2020 | $585,982 | $573,051 | 2024-12 |
| Huron County Land Reutilization | Norwalk | 501(c)(3) | 2019 | $581,264 | $317,365 | 2024-12 |
| Western Wildlife Corridor Inc | Cincinnati | 501(c)(3) | 1993 | $551,530 | $3.3 million | 2024-12 |
| Partners for Clean Streams Inc | Perrysburg | 501(c)(3) | 2007 | $539,752 | $175,243 | 2024-12 |
| Ohio Chapter International Society of Arboriculture | Frazeysburg | 501(c)(3) | 2004 | $533,671 | $570,811 | 2025-09 |
| Friends of Stark Parks | Canton | 501(c)(3) | 1997 | $517,345 | $814,629 | 2025-12 |
| Foundation for Geauga Parks | Chesterland | 501(c)(3) | 1991 | $503,820 | $1.2 million | 2024-12 |
| Woodland Arboretum Foundation | Dayton | 501(c)(3) | 1991 | $453,725 | $4.1 million | 2024-12 |
| Clean Energy Ventures | Columbus | 501(c)(3) | 2024 | $446,728 | $1.5 million | 2024-12 |
| Herb Society of America Inc | Kirtland | 501(c)(3) | 1993 | $443,811 | $3.2 million | 2025-03 |
| Crown Point Ecology Center | Bath | 501(c)(3) | 2011 | $433,266 | $427,475 | 2025-09 |
| Columbus Recreation and Parks Foundation | Columbus | 501(c)(3) | 2019 | $431,385 | $948,701 | 2024-12 |
| Ohio Land Bank Association | Akron | 501(c)(6) | 2019 | $426,941 | $256,589 | 2024-12 |
| Ohio River Foundation | Blue Ash | 501(c)(3) | 2000 | $425,997 | $327,950 | 2024-12 |
| Hillside Trust | Cincinnati | 501(c)(3) | 1980 | $425,019 | $11.2 million | 2024-12 |
| Rising Appalachia | Millfield | 501(c)(3) | 2016 | $405,627 | $87,569 | 2024-12 |
| City Fresh | Oberlin | 501(c)(3) | 2000 | $394,886 | $527,937 | 2024-12 |
| Toledo Botanical Garden Board Inc | Toledo | 501(c)(3) | 1982 | $376,840 | $320,226 | 2024-12 |
| Imago | Cincinnati | 501(c)(3) | 1984 | $369,520 | $477,012 | 2024-12 |
| Cleanenergy4all | Dayton | 501(c)(3) | 2014 | $359,557 | $53,721 | 2025-12 |
| Kendall Foundation Inc | Ashtabula | 501(c)(3) | 2020 | $351,241 | $288,369 | 2024-12 |
| Lake Erie Islands Nature and Wildlife Center | Put in Bay | 501(c)(3) | 2011 | $349,564 | $1.2 million | 2024-12 |
| Lake Erie Foundation | Marblehead | 501(c)(3) | 2016 | $331,419 | $1.5 million | 2024-12 |
| Clean Fuels Ohio | Lakewood | 501(c)(3) | 2000 | $321,408 | $82,767 | 2024-12 |
| Ohio Natural Areas and Preserves Association | Johnstown | 501(c)(3) | 2013 | $317,865 | $416,285 | 2025-12 |
| America in Bloom | Columbus | 501(c)(3) | 2003 | $316,505 | $772,132 | 2025-12 |
| Water Management Association of Ohio | Berea | 501(c)(3) | 2015 | $314,046 | $368,707 | 2025-12 |
| Miamisburg Community Foundation | Miamisburg | 501(c)(3) | 2014 | $308,094 | $389,742 | 2024-12 |
| Cleveland Cultural Gardens Federation | Cleveland | 501(c)(3) | 1960 | $303,421 | $539,612 | 2025-12 |
| Valley View Foundation | Milford | 501(c)(3) | 2002 | $300,982 | $4.9 million | 2025-12 |
| Community Life Collaborative | Chagrin Falls | 501(c)(3) | 2020 | $298,834 | $257,785 | 2024-12 |
| Coshocton Is Blooming | Coshocton | 501(c)(3) | 2012 | $297,805 | $441,161 | 2024-12 |
| Keep Toledo Beautiful Inc | Toledo | 501(c)(3) | 1986 | $297,117 | $166,977 | 2024-12 |
| Friends of Liberia Food and Water | Cincinnati | 501(c)(3) | 2025 | $294,801 | $33,826 | 2025-12 |
| Association of Ohio Metropolitan Wastewater Agencies Inc | Cleveland | 501(c)(6) | 2002 | $276,924 | $198,796 | 2025-12 |
| Friends of Columbus and Franklin County Metro Parks | Westerville | 501(c)(3) | 2014 | $262,921 | $484,662 | 2025-12 |
| The Ohio River Way Inc | Cincinnati | 501(c)(3) | 2003 | $258,730 | $228,220 | 2025-12 |
| Lake Erie Islands Conservancy | Put in Bay | 501(c)(3) | 2015 | $255,106 | $325,018 | 2024-12 |
| Blue Feather Land Trust | Barnesville | 501(c)(3) | 2025 | $241,627 | $761,285 | 2025-12 |
| Buckeye Outdoors Youth Education and Shooting Center Inc | Doylestown | 501(c)(3) | 2007 | $241,323 | $248,457 | 2024-12 |
| Bowling Green Recycling Center Inc | Bowling Green | 501(c)(3) | 1998 | $234,872 | $703,848 | 2024-12 |
| Ohios Hill Country Heritage Area | Shawnee | 501(c)(3) | 2000 | $233,257 | $79,775 | 2024-12 |
| Meyers Lake Preserve Inc | Canton | 501(c)(3) | 1994 | $232,331 | $1.7 million | 2025-12 |
| Killbuck Watershed Land Trust | Wooster | 501(c)(3) | 2001 | $229,279 | $1 million | 2024-12 |
| Kokosing Gap Trail Inc | Gambier | 501(c)(3) | 1994 | $227,491 | $744,286 | 2025-12 |
| Nutrient Stewardship Council | Columbus | 501(c)(3) | 2015 | $226,597 | $224,784 | 2025-12 |
| Indian Lake Watershed Project | Bellefontaine | 501(c)(3) | 1998 | $225,098 | $1.2 million | 2024-12 |
| Together We Grow Inc | Newark | 501(c)(3) | 2015 | $215,216 | $71,628 | 2025-12 |
| Gates Mills Land Conservancy | Gates Mills | 501(c)(3) | 1989 | $214,899 | $7.2 million | 2024-12 |
| Henry-Wood Sportsmans Alliance | Grand Rapids | 501(c)(3) | 2015 | $212,180 | $1.1 million | 2024-12 |
| Environmental Education Council of Ohio Incorporated | Lancaster | 501(c)(3) | 1983 | $199,591 | $161,229 | 2025-12 |
| Friends of the Lower Olentangy Watershed Flow | Columbus | 501(c)(3) | 1998 | $195,157 | $464,702 | 2025-12 |
| Providing Oberlin With Efficiency Responsibly | Oberlin | 501(c)(3) | 2011 | $190,272 | $460 | 2024-12 |
| Shaker Lakes Regional Nature Center Endowment Foundation | Shaker HTS | 501(c)(3) | 1983 | $183,682 | $3.5 million | 2025-06 |
| Garden Club of Ohio Inc | E Rochester | 501(c)(3) | 1985 | $179,203 | $2.6 million | 2025-06 |
| Foundation for Ohio River Education | Cincinnati | 501(c)(3) | 2004 | $173,463 | $221,268 | 2025-06 |
| Downtown Foundation Inc | Bowling Green | 501(c)(3) | 2010 | $171,565 | $406,056 | 2024-12 |
| Ohio Forestry Association Foundation Inc | Columbus | 501(c)(3) | 1948 | $170,000 | $746,109 | 2024-12 |
| Black Swamp Bucks Unlimited | Findlay | 501(c)(3) | 2017 | $165,953 | $492,091 | 2025-12 |
| Western Field Studies Inc | Gahanna | 501(c)(3) | 2022 | $165,662 | $17,802 | 2025-08 |
| International Environmental Communication Association | Cincinnati | 501(c)(3) | 2012 | $164,925 | $88,030 | 2025-12 |
| James M Cox Jr Arboretum Foundation | Dayton | 501(c)(3) | 1965 | $161,535 | $2.4 million | 2024-12 |
| Captina Conservancy | Barnesville | 501(c)(3) | 2011 | $158,556 | $2.6 million | 2025-06 |
| Indian Lake Advocacy Group | Russells PT | 501(c)(3) | 2022 | $156,004 | $5.2 million | 2025-12 |
| Lake Erie Islands Historical Society | Put in Bay | 501(c)(3) | 2011 | $152,163 | $581,461 | 2025-12 |
| Nigerian Association of Pharmacists and Pharmaceutical Scientists in | Cincinnati | 501(c)(3) | 2007 | $148,749 | $85,540 | 2025-12 |
| Projects Inc | Bucyrus | 501(c)(3) | 2003 | $148,026 | $538,902 | 2024-12 |
| Lake Parks Foundation | Wickliffe | 501(c)(3) | 1990 | $138,604 | $1.4 million | 2025-12 |
| Oxford Society | Oxford | 501(c)(3) | 2002 | $130,437 | $3.3 million | 2025-12 |
| Edenculture | Toronto | 501(c)(3) | 2019 | $127,129 | $23,344 | 2024-12 |
| Ashland County Wildlife Conservation League | Ashland | 501(c)(3) | 2016 | $127,122 | $224,390 | 2025-12 |
| Friends of Magee Marsh Association Inc | Port Clinton | 501(c)(3) | 1999 | $125,266 | $337,848 | 2025-12 |
| Cub Ohio Advocacy Group | Lakewood | 501(c)(4) | 2025 | $120,020 | $5,020 | 2024-12 |
| Stanley F Herman Charitable Trust Fbo Kalamazoo Nature Center 5-15-85 | Cincinnati | 501(c)(3) | 1991 | $115,679 | $1.3 million | 2025-07 |
| Delphos Canal Commission | Delphos | 501(c)(3) | 1991 | $110,158 | $512,723 | 2024-12 |
| Garden Club of Ohio Inc | Fairlawn | 501(c)(3) | 1985 | $108,800 | $1.3 million | 2025-06 |
| Garden Club of Cleveland | Lyndhurst | 501(c)(3) | 1999 | $106,059 | $194,835 | 2025-06 |
| Conservation Action Project | Bowling Green | 501(c)(3) | 1997 | $102,559 | $145,930 | 2025-12 |
| Broken Timber Outdoor Education Center Inc | Hannibal | 501(c)(3) | 2022 | $101,948 | $150,267 | 2024-12 |
| Muskingum Watershed Conservancy Foundation Inc | New Phila | 501(c)(3) | 2001 | $100,994 | $283,933 | 2024-12 |
| Ohio Agriculture Conservation Council | Reynoldsburg | 501(c)(3) | 2021 | $100,000 | $232,078 | 2025-12 |
| Buckeye Environmental Network | Columbus | 501(c)(3) | 1996 | $98,606 | $565,241 | 2024-12 |
| Downtown Lancaster Special Improvement District Inc | Lancaster | 501(c)(3) | 2006 | $95,632 | $34,550 | 2024-12 |
| Masters Gardeners of Clark County | Springfield | 501(c)(3) | 2000 | $95,484 | $135,652 | 2025-12 |
| B-W Greenway Community Land Trust | Fairborn | 501(c)(3) | 2000 | $93,199 | $493,245 | 2025-12 |
| Western Reserve Herb Society | Cleveland | 501(c)(3) | 1969 | $93,133 | $1.4 million | 2025-12 |
| Shaker Lakes Garden Club | Cleveland HTS | 501(c)(3) | 1965 | $88,944 | $212,002 | 2025-06 |
| Legaseas Inc | New Richmond | 501(c)(3) | 2003 | $86,050 | $16,552 | 2025-06 |
| Taking Root Inc | Cincinnati | 501(c)(3) | 2016 | $82,680 | $91,086 | 2025-12 |
| Ohio Wildlife Rehabilitators Association | Sunbury | 501(c)(3) | 1992 | $80,724 | $121,782 | 2025-12 |
| Ohio Independent Arborist Association | Middlefield | 501(c)(3) | 2018 | $75,405 | $67,698 | 2024-12 |
| Ironton in Bloom Inc | Ironton | 501(c)(3) | 2010 | $74,881 | $43,983 | 2025-12 |
| Columbus Audubon Society | Columbus | 501(c)(3) | 1978 | $74,317 | $447,273 | 2025-06 |
| Little Miami Watershed Network | Bellbrook | 501(c)(3) | 2022 | $70,494 | $87,843 | 2025-12 |
| Naturewise Columbus | Blacklick | 501(c)(3) | 2024 | $68,385 | $35,540 | 2025-12 |
| Twin City Parks and Waterways Inc | Uhrichsville | 501(c)(3) | 2023 | $68,350 | $8,476 | 2025-12 |
| Lake Erie Waterkeeper Inc | Toledo | 501(c)(3) | 2005 | $67,619 | $38,552 | 2024-12 |
| Hudson Garden Club | Hudson | 501(c)(3) | 2025 | $67,616 | $77,434 | 2025-12 |
| Bronson Norwalk Conservation League Inc | Norwalk | 501(c)(4) | 2014 | $67,361 | $355,210 | 2024-12 |
| Summit County Master Gardeners | Akron | 501(c)(3) | 2002 | $66,755 | $73,718 | 2024-12 |
| Little Garden Club of Columbus | Blacklick | 501(c)(3) | 1995 | $64,024 | $30,158 | 2025-06 |
| West Central Ohio Land Conservancy | Bluffton | 501(c)(3) | 2007 | $63,873 | $531,586 | 2025-12 |
| International Union for the Study of Social Insects | Columbus | 501(c)(3) | 2012 | $63,771 | $46,883 | 2025-12 |
| Four Symbolic Lodges & Chapters FSLC | Cleveland | 501(c)(3) | 2014 | $61,830 | $88,968 | 2025-12 |
| Coah Conservation Inc | W Jefferson | 501(c)(3) | 2014 | $60,743 | $54,581 | 2024-12 |
| Buckeye Lake for Tomorrow Inc | Buckeye Lake | 501(c)(3) | 2009 | $60,544 | $98,915 | 2025-12 |
| Ohio Stream Preservation Inc | Oakwood Village | 501(c)(3) | 2000 | $58,969 | $517,258 | 2025-05 |
| Friends of Madison County Parks and Trails | London | 501(c)(3) | 2002 | $58,154 | $343,175 | 2025-12 |
| Friends of Secrestarboretum | Wooster | 501(c)(3) | 1995 | $57,138 | $60,334 | 2025-09 |
| Simon Kenton Pathfinders | Urbana | 501(c)(3) | 2000 | $55,458 | $307,033 | 2025-12 |
| Hunters Point Waterfowl Foundation | Avon | 501(c)(3) | 2011 | $55,128 | $105,113 | 2025-12 |
| Northern Tuscarawas Land Trust | Zoarville | 501(c)(3) | 2021 | $50,766 | $1.2 million | 2025-12 |
| Syrian Cultural Garden Foundation Inc | Chagrin Falls | 501(c)(3) | 2025 | $50,620 | $50,620 | 2025-12 |
| Green Energy Ohio | Columbus | 501(c)(3) | 1995 | $49,484 | $21,353 | 2024-12 |
| Cincinnati Permaculture Institute | Cincinnati | 501(c)(3) | 2014 | $48,316 | $47,607 | 2025-12 |
| Cleveland Audubon Society | Solon | 501(c)(3) | 2014 | $46,476 | $689,251 | 2025-10 |
| National Scenic Byway Foundation | Millersburg | 501(c)(3) | 2005 | $46,174 | $48,259 | 2025-12 |
| Inniswood Garden Society | Westerville | 501(c)(3) | 1986 | $43,289 | $221,008 | 2025-12 |
| Friends of the Gorman Nature Center Inc | Mansfield | 501(c)(3) | 1985 | $42,558 | $344,301 | 2025-12 |
| Rocky River Watershed Council Inc | Cleveland | 501(c)(3) | 2008 | $42,438 | $29,274 | 2025-12 |
| Coshocton C A R E S College Access Program | Coshocton | 501(c)(3) | 2007 | $42,119 | $48,391 | 2025-06 |
| Rooted in Trees Ohio LLC | Kirtland | 501(c)(3) | 2024 | $40,224 | $13,127 | 2024-12 |
| Ohio Valley Conservation Coalition | Jackson | 501(c)(3) | 2010 | $35,979 | $9 million | 2024-12 |
| Friends of Scioto Brush Creek Inc | Otway | 501(c)(3) | 2006 | $35,847 | $831,786 | 2025-12 |
| Aurora Conservation Councils Moebius Nature Center Inc | Aurora | 501(c)(3) | 2007 | $34,864 | $177,730 | 2025-12 |
| Ohio Pirg Citizen Lobby | Columbus | 501(c)(4) | 2004 | $34,164 | $428,034 | 2025-06 |
| Friends of Big Creek | Cleveland | 501(c)(3) | 2011 | $33,557 | $18,925 | 2023-12 |
| Shared Power Network Inc | Columbus | 501(c)(3) | 2014 | $33,077 | $104,573 | 2024-12 |
| Ferncliff Foundation | Springfield | 501(c)(3) | 2023 | $32,688 | $33,562 | 2024-12 |
| Bishop Educational Gardens Incorporated | Rockbridge | 501(c)(3) | 2007 | $31,208 | $41,477 | 2025-12 |
| Ohio Wetlands Association Inc | Columbus | 501(c)(3) | 2012 | $30,860 | $64,002 | 2024-12 |
| Capital City Pipes & Drums and Highland Dancers Inc | Columbus | 501(c)(3) | 2012 | $30,501 | $152,249 | 2024-12 |
| Izaak Walton League of America Inc | Cincinnati | 501(c)(3) | 1985 | $27,435 | $62,912 | 2025-12 |
| Blanchard River Watershed Partnership | Findlay | 501(c)(3) | 2006 | $26,497 | $87,814 | 2024-12 |
| Foundation for Environmental Education | Columbus | 501(c)(3) | 1996 | $26,086 | $392,308 | 2025-12 |
| Just Earth - Cincinnati Inc | Cincinnati | 501(c)(3) | 2022 | $24,960 | $41,574 | 2025-12 |
| Glass City Community Solar Inc | Toledo | 501(c)(3) | 2018 | $24,843 | $154,175 | 2025-12 |
| Beautify Belpre | Belpre | 501(c)(3) | 2020 | $24,487 | $21,243 | 2025-12 |
| Northwestern Ohio Rails To Trails Association Inc | Delta | 501(c)(3) | 1993 | $22,834 | $511,513 | 2025-09 |
| Ohio Native Plant Month | Shaker HTS | 501(c)(3) | 2019 | $22,643 | $64,140 | 2025-12 |
| Irish Garden Club LLC | Cleveland | 501(c)(3) | 2009 | $22,417 | $621,692 | 2025-12 |
| Friends of Caesar Creek Cooperating Association | Waynesville | 501(c)(3) | 1990 | $20,526 | $140,989 | 2025-12 |
| Ottawa River Coalition | Lima | 501(c)(3) | 1994 | $19,036 | $25,159 | 2025-12 |
| Earth Action Partnership Inc | Zoar | 501(c)(3) | 1995 | $17,330 | $285,567 | 2025-09 |
| East Green Foundation | Tiffin | 501(c)(3) | 2019 | $16,102 | $2.7 million | 2025-12 |
| The Ohio Society of Radiologic Technoligists Education and Resear | Zanesville | 501(c)(3) | 1992 | $14,659 | $43,986 | 2025-08 |
| Friends of Adams County 4-H & Extension | Peebles | 501(c)(3) | 2021 | $13,315 | $3,254 | 2025-12 |
| Friends of Lower Muskingum River | Marietta | 501(c)(3) | 2003 | $13,309 | $918,006 | 2024-12 |
| Parkard Park Greenhouse Growers Inc | Warren | 501(c)(3) | 2025 | $12,996 | $44,313 | 2025-12 |
| Ohio Forest Sanctuaries | Malvern | 501(c)(3) | 2021 | $11,540 | $469,419 | 2025-12 |
| Wilderness East | Bainbridge | 501(c)(3) | 2004 | $11,433 | $6.1 million | 2025-12 |
| Columbiana Restoration & Beautification Committee | Columbiana | 501(c)(3) | 2008 | $10,276 | $294,474 | 2025-12 |
| Bahamas Plastic Movement Inc | Westerville | 501(c)(3) | 2019 | $10,100 | $97,909 | 2025-12 |
| Eriesponsible Inc | Westlake | 501(c)(3) | 2019 | $8,489 | $905 | 2025-12 |
| Misty Meadows Inc | Fremont | 501(c)(3) | 2013 | $7,248 | $167,493 | 2024-12 |
| Grassroots Foundation of Morrow County | Mount Gilead | 501(c)(3) | 2022 | $5,900 | $4,174 | 2025-12 |
| Trees & Trails Foundation | Cincinnati | 501(c)(3) | 2023 | $4,953 | $1 | 2025-12 |
| The Urban Tree Project Inc | Columbus | 501(c)(3) | 2020 | $3,754 | $12,947 | 2025-12 |
| Hocking River Commission Inc | Athens | 501(c)(3) | 1998 | $3,575 | $523,302 | 2025-12 |
| Israel Nature and Heritage Foundation of America Inc | Grove City | 501(c)(3) | 2018 | $3,182 | $530,406 | 2025-12 |
| Ideas Institute | Cleveland HTS | 501(c)(3) | 2000 | $2,744 | $62,131 | 2025-12 |
| Luckey Garden Club | Luckey | 501(c)(3) | 2024 | $2,546 | $3,058 | 2025-12 |
| The Burning River Foundation Inc | Cleveland | 501(c)(3) | 2007 | $2,046 | $109,853 | 2025-12 |
| German Garden and Cultural Foundation of Cleveland Inc | Parma | 501(c)(3) | 2017 | $1,240 | $31,915 | 2025-12 |
| Conservation Foundation of America | Canal WNCHSTR | 501(c)(3) | 2006 | $1,151 | $100,634 | 2025-12 |
| Wild Classroom Inc | Nashport | 501(c)(3) | 2021 | $1,017 | $1,723 | 2025-12 |
| Imperfectly Perfect Foundation Inc | Quaker City | 501(c)(3) | 2025 | $980 | $1 | 2025-12 |
| New Bremen Giant Pumpkin Growers | New Bremen | 501(c)(5) | 2006 | $644 | $53,152 | 2023-12 |
| Westwood Grows | Cincinnati | 501(c)(3) | 2022 | $500 | $19 | 2025-12 |
| Wildlife Habitat Conservancy Inc | Canton | 501(c)(3) | 2007 | $350 | $97,321 | 2025-12 |
| Cuyahoga Valley Countryside Conservancy | Cuyahoga FLS | 501(c)(3) | 2000 | $172 | $39,522 | 2025-12 |
| Awe Foundation | Canfield | 501(c)(3) | 2003 | $5 | $15,117 | 2025-12 |
| Environmental Experiences Inc | Wooster | 501(c)(3) | 1992 | $3 | $643 | 2025-08 |
| Acc Red Brick Foundation | Columbus | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Adams County Nature Society Inc | Cincinnati | 501(c)(3) | 2025 | |||
| Adore Abatement | Toledo | 501(c)(3) | 2025 | |||
| Afghan Community of Ohio | Columbus | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Afternoon Garden Club | Canton | 501(c)(3) | 2024 | $0 | $0 | 2026-04 |
| Akron Community Farms | Akron | 501(c)(3) | 2022 | $0 | $230,915 | 2025-12 |
| Akron-Canton Bonsai Society | Tallmadge | 501(c)(3) | 2014 | $0 | $0 | 2025-10 |
| Algae Remediation Coalition | Lakewood | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Allen County Master Gardeners | Cairo | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Alms Park Advisory Council | Cincinnati | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Alum Creek Volunteers in the Park | Sunbury | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Amherst Ohio Garden Club | Vermilion | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Aor Foundation | Columbus | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Armenian Cultural Garden Inc | Pepper Pike | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Arron Yantis Foundation Incorporated | Columbus | 501(c)(3) | 2024 | |||
| Ashtabula County Wildlife Conservation League | Geneva | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Association of Ngatamaare Nationals Corp | Columbus | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Athalia Community Action Council | Proctorville | 501(c)(3) | 2025 | |||
| Audubon Miami Valley | Oxford | 501(c)(3) | 2002 | $0 | $0 | 2025-06 |
| Audubon Society of Ohio | Cincinnati | 501(c)(3) | 1952 | $0 | $0 | 2025-06 |
| Aurica Community Gardens | Cleveland | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Austintown Beautification Committee | Austintown | 501(c)(4) | 2014 | $0 | $0 | 2024-12 |
| Avon Garden Club | Avon | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Back To Basics Nature Alliance | Blanchester | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Backyard Conservation | Columbus | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Bangladesh Environment Network | Dublin | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Bartram Foundation Inc | Lancaster | 501(c)(3) | 2025 | |||
| Bay Village Tree Conservancy Inc | Bay Village | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Beaverdam Fire and Rescue Volunteers Inc | Beaverdam | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Beeps Foundation | Maineville | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Benefit Earth Inc | Lakewood | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Berlin Lake Association | Deerfield | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Between the Waters | Dayton | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Blackbrook Audubon Society | Mentor | 501(c)(3) | 1995 | $0 | $0 | 2025-06 |
| Blanchard River Watershed Solutions | Findlay | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Blue Ash Park and Recreation Foundation Inc | Cincinnati | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Bobolink Young Birders Group Inc | Millersburg | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Buckeye Precious Plastic | Columbus | 501(c)(3) | 2019 | $0 | $0 | 2023-12 |
| Buckeye United Fly Fishers Inc | Cincinnati | 501(c)(3) | 1996 | $0 | $0 | 2025-12 |
| Building Blocks Environmental Health Partners | Toledo | 501(c)(3) | 2024 | |||
| Bur Oak Land Management Inc | Piqua | 501(c)(3) | 2006 | $267,698 | 2025-12 | |
| Burr Oak Alive | Glouster | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Cadillac Boulevard Neighborhood Development Inc | Akron | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Canaan Residents Against Pollution | Wooster | 501(c)(3) | 2019 | $0 | $0 | 2023-12 |
| Canton Cemetery Foundation | Canton | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Canton Garden Center | Canton | 501(c)(3) | 1972 | $0 | $0 | 2025-12 |
| Canvas Wings Inc | Georgetown | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Carroll Concerned Citizens | Carrollton | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Center for Indoor Air Quality and H Uman Health | Cincinnati | 501(c)(3) | 2026 | |||
| Central Ohio Certified Hazardous Materials Managers Cochmm | Grove City | 501(c)(3) | 2015 | $6,092 | 2025-12 | |
| Central Ohio Grotto of the National Speleological Society | Johnstown | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Central Ohio Institute of Packaging Professionals | Columbus | 501(c)(3) | 2023 | $5,694 | 2025-12 | |
| Central Ohio Orchid Society Inc | Gahanna | 501(c)(3) | 1990 | $0 | $0 | 2025-12 |
| Chagrin Valley Herb Society | Chagrin Falls | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Charitable Recycling | Dayton | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Cincinnati Dahlia Society | Cincinnati | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Cincinnati Horticultural Society | Cincinnati | 501(c)(3) | 1990 | $0 | $0 | 2024-12 |
| Cincinnati Nature Center Foundation | Milford | 501(c)(3) | 2025 | $0 | $1 | 2025-12 |
| Cincinnati Town and Country Garden Club | Cincinnati | 501(c)(3) | 1967 | $0 | $0 | 2026-06 |
| Cindy and Zoey Memorial Foundation | Elyria | 501(c)(3) | 2025 | |||
| Citizens Advocating Responsible Energy | Chagrin Falls | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Citizens Against Richwood Solar Inc | Richwood | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Citizens Climate Lobby Cleveland Chapter | Shaker HTS | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Citizens Vision | Cleveland | 501(c)(3) | 2000 | $0 | $0 | 2023-12 |
| Citizens for Greene Acres Inc | Cedarville | 501(c)(4) | 2021 | $0 | $0 | 2025-12 |
| Clean City of Willoughby Inc | Willoughby | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Clean Waterways of America Inc | Toledo | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Clear Creeks and Byways Inc | Pickerington | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Cleveland Anglers | Cleveland | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Cleveland Conservation Collective | Cleveland | 501(c)(3) | 2025 | $0 | $0 | 2026-06 |
| Clifton Beach Preservation Inc | North Olmsted | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Clinton Rails To Trails | Wilmington | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Columbiana High School Class of 1977 Celebration of Life Garden | Columbiana | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Columbus Community Rights Coalition | Columbus | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Community Catalyst | Cincinnati | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Community Recycling Campaign Inc | Powell | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Confluence Water Technology Innovation Cluster Inc | Cincinnati | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Conscious Cap Corp | Columbus | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Covenant Chapter 48 Oes | Youngstown | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Cummings Floralscaping Foundation | Ottawa Hills | 501(c)(3) | 2024 | |||
| Cuyahoga Ecocultural Conservancy | Brecksville | 501(c)(3) | 2026 | |||
| Cuyahoga Falls Community Gardens Inc | Silver Lake | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Dahlia Society of Ohio | Cleveland HTS | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Darby Creek Matters Inc | London | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Delaware County Master Gardener Association | Delaware | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Delaware Land Conservancy DCLC | Delaware | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Disciples in Blue | Perrysburg | 501(c)(3) | 2020 | $0 | $0 | 2024-01 |
| Dogwood Valley Garden Club Inc | Chagrin Falls | 501(c)(7) | 2010 | $0 | $0 | 2026-06 |
| Donate A Tree To the World | Pepper Pike | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Doxa Research Group Inc | Brookville | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Ducks Unlimited Inc | McConnelsvle | 501(c)(3) | ||||
| Duncan Falls Horticultural Association | Philo | 501(c)(5) | 2022 | $0 | $0 | 2024-12 |
| Earth at Heart | Beachwood | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Earthology Kids | Brooklyn | 501(c)(3) | 2026 | |||
| Eco Environmental Community Organization | Cincinnati | 501(c)(3) | 1998 | $0 | $0 | 2025-12 |
| Eco-Friendly Jobs Employment and Training LLC | Shaker HTS | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Ecotenet | Millfield | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Ecowice Foundation | New Marshfld | 501(c)(3) | 2025 | $569 | 2025-12 | |
| Edgewater Surf | Bay Village | 501(c)(3) | 2026 | |||
| Ekklesia House Ministries Inc | Massillon | 501(c)(3) | 2013 | |||
| Erie Marsh Conservation Foundation | Perrysburg | 501(c)(3) | 2022 | $87,610 | 2025-12 | |
| Even Cities Need Trees | Columbus | 501(c)(3) | 2025 | $0 | $0 | 2026-01 |
| Fact Ohio | Mentor | 501(c)(3) | 2016 | $0 | $0 | 2024-09 |
| Fairfield Land Preservation Association | Lancaster | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Fairview Park Civic Beautification | Fairview Park | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Fairview Park Green Team | Fairview Park | 501(c)(3) | 2023 | $3,250 | 2025-08 | |
| Family Safe | Bedford Heights | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Family Well Project | Athens | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Federated Garden Clubs of Cincinnati and Vicinity | Terrace Park | 501(c)(3) | 1980 | $0 | $0 | 2026-05 |
| Firelands Audubon Society | Sandusky | 501(c)(3) | 2015 | $0 | $0 | 2026-05 |
| For All Species Education | Westerville | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Four Square Block Watch | Youngstown | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Franklin County Pollinator Pathway | Columbus | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Friend of Punderson State Park | Beachwood | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Friends of Alum Creek and Tributaries | Bexley | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Friends of Brunswick Parks Inc | Brunswick | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Friends of Buck Creek Inc | Springfield | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Friends of Caldwell VFW 4721 | Caldwell | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Friends of Canton Parks and Recreation | Canton | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Friends of Deer Creek Inc | Mount Sterling | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Friends of Euclid Creek | South Euclid | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Friends of Findley State Park Inc | Wellington | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Friends of Harrison Lake State Park Inc | Archbold | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Friends of Heights Parks | Cleveland HTS | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Friends of Hiram Parks Public Gardens & Trails Association | Hiram | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Friends of Horseshoe Lake | Shaker HTS | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Friends of Hudson Parks | Hudson | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Friends of Independence Dam State Park | Defiance | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Friends of Lake Katharine | Jackson | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Friends of Lakelands Inc | Warren | 501(c)(3) | 2022 | $0 | $0 | 2025-11 |
| Friends of Maumee Bay State Park | Oregon | 501(c)(3) | 1997 | $0 | $0 | 2025-12 |
| Friends of Metroparks of Butler County | Hamilton | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Friends of Monteverde Cloud Forest Reserve | Cleveland | 501(c)(3) | 1991 | $0 | $0 | 2023-06 |
| Friends of Old Woman Creek Association Inc | Huron | 501(c)(3) | 1998 | $0 | $0 | 2025-12 |
| Friends of Pymatuning State Park | Williamsfield | 501(c)(3) | 2023 | $4,819 | 2024-06 | |
| Friends of Sandusky Greenhouse Inc | Sandusky | 501(c)(3) | 2011 | $0 | $0 | 2024-12 |
| Friends of Seneca County Park District | Tiffin | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Friends of Van Buren State Park Inc | Risingsun | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Friends of the Asa Wright Nature Centre Inc | Cincinnati | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Friends of the Great Miami | Cincinnati | 501(c)(3) | 1999 | $0 | $688 | 2024-12 |
| Friends of the Kokosing Scenic River | Mount Vernon | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Friends of the Mahoning River | Girard | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Friends of the Near East Side Parks & Gardens | Columbus | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Friends of the Park Inc and Greenspace | Lisbon | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| Friends of the Paulding Park District Inc | Oakwood | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Friends of the Poland Municipal Forest | Poland | 501(c)(3) | 2012 | $0 | $0 | 2025-06 |
| Friends of the Ravines | Columbus | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| Friends of the Shelby County Park District | Sidney | 501(c)(3) | 2014 | $0 | $0 | 2023-12 |
| Friends of the Topiary Park Inc | Dublin | 501(c)(3) | 1993 | $0 | $0 | 2024-12 |
| Frontier Farm & Wilderness | Waynesville | 501(c)(3) | 2026 | $0 | $0 | 2021-12 |
| Gallia County Conservation Club | Gallipolis | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Garden Club of Ohio Inc | Brooklyn | 501(c)(3) | 1985 | $0 | $0 | 2024-12 |
| Garden Club of Ohio Inc | Columbus | 501(c)(3) | 1985 | $0 | $0 | 2025-12 |
| Garden Club of Ohio Inc | Dayton | 501(c)(3) | 1998 | $0 | $0 | 2025-04 |
| Garden Club of Ohio Inc | Dublin | 501(c)(3) | 2025 | $0 | $0 | 2026-04 |
| Garden Club of Ohio Inc | Worthington | 501(c)(3) | 1985 | $0 | $0 | 2025-12 |
| Garden Club of Ohio Inc | North Canton | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Garden Club of Ohio Inc | Hilliard | 501(c)(3) | 1985 | $0 | $0 | 2026-04 |
| Garden Club of Ohio Inc | Lebanon | 501(c)(3) | 2024 | $0 | $0 | 2026-03 |
| Garden Club of Ohio Inc | Berea | 501(c)(3) | 1985 | $0 | $0 | 2025-12 |
| Garden District Corporation | Columbus | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Garden Forum of the Greater Youngstown Area Inc | Canfield | 501(c)(3) | 1966 | $0 | $0 | 2025-12 |
| Gardenwalk Cleveland | Cleveland | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Gateway Elementary Outdoor Learning Center | Conneaut | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Gateway Youth Development Program | Toledo | 501(c)(3) | 2018 | $0 | $0 | 2026-06 |
| Gem City Reuse | Dayton | 501(c)(3) | 2026 | |||
| Genoa Township Land Conservation Association | Galena | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Glass Roots | Fostoria | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Global Won | Columbus | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Go Green Go | Hudson | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Gozero Institute | Zanesfield | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Grand Growers | Toledo | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Granville Garden Club | Granville | 501(c)(3) | 1994 | $0 | $0 | 2025-05 |
| Great Lakes Natural Fibers Inc | Wooster | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Greater Cincinnati Daylily-Hosta Society | Maineville | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Greater Cincinnati Earth Coalition | Cincinnati | 501(c)(3) | 1999 | $0 | $0 | 2025-09 |
| Greater Cincinnati Orchid Society | Mason | 501(c)(3) | 2009 | $0 | $0 | 2024-12 |
| Greater Cleveland Aquarium Education Fund | Cleveland | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Greater Cleveland Beekeepers Association | Cleveland | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Greater Columbus Dahlia Society | Columbus | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Greater Columbus Growing Coalition | Columbus | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Greater Dayton African Coalition | Dayton | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Greater Lake Lorelei Water Improvement Corp | Fayetteville | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Greater Montgomery County Master Gardener Association | Kettering | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Green Alliance | Alliance | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Green Creek Marsh Conservancy | Helena | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Green Environmental Coalition | Yellow SPGS | 501(c)(3) | 1989 | $0 | $0 | 2025-12 |
| Green Triangle Project | Lakewood | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Greenacres Foundation | Cincinnati | 501(c)(3) | 1988 | $411.9 million | 2025-12 | |
| Greene Acres Community Garden Inc | Broadview HTS | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Greener Earth | Solon | 501(c)(3) | 2026 | |||
| Greenwing Conservancy | Warren | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Greenwood Farm Historical Cultural & Arts Association Inc | Richmond HTS | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Growing Green Inc | Martinsville | 501(c)(3) | 2011 | $0 | $0 | 2024-12 |
| Gruder Foundation | North Canton | 501(c)(3) | 2019 | $1 | 2024-12 | |
| Gryphon Den Creatures of the Night Inc | Magnolia | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Guernsey County Outdoor Heritage As Sociation | Cambridge | 501(c)(3) | 2026 | |||
| Hamilton Conservation Corps LLC | Hamilton | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Hancock County Naturalists | Findlay | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Happy Foods Inc | Blanchester | 501(c)(3) | 2024 | |||
| Happy Planet | Grafton | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Harmons Morels Community Outreach | Dresden | 501(c)(3) | 2025 | |||
| Healing Hearts Gardening | North Canton | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Heights Tree People Inc | Cleveland HTS | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Hicksville Trail Association | Hicksville | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Hike Toronto | Toronto | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Hocking Hills Foundation | Logan | 501(c)(3) | 2025 | |||
| Holborn Herb Growers Guild Inc | Youngstown | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Holmes Conservation | Holmesville | 501(c)(3) | 2022 | $0 | $0 | 2025-05 |
| Hopfinger-Zimmerman Memorial Park | Port Clinton | 501(c)(3) | 2017 | $2.7 million | 2025-12 | |
| Hosta Society of Greater Cincinnati | Cincinnati | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Hoto9cycle Corp | North Jackson | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| How Do We Sustain | Dayton | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Hudson Society of Artists | Hudson | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Huron County Master Gardener Association | Norwalk | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Hydro4life | Dublin | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Idora Neighborhood Association | Youngstown | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Indian Hill Equestrian Club | Bethel | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Indian Hill Pure Water Project | Cincinnati | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Institute for Climate Action Resear CH and Experience | Cleveland | 501(c)(3) | 2026 | |||
| International Rangers Association | Cloverdale | 501(c)(3) | 2026 | |||
| Iyfr Western Lake Erie Fleet | Toledo | 501(c)(4) | 2014 | $0 | $0 | 2025-12 |
| Izaak Walton League of America Inc | Loveland | 501(c)(3) | 1985 | $0 | $0 | 2025-12 |
| Jefferson Township Land Conservation Association | Blacklick | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Jose & Sons Recycling Inc | Lima | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Keep the Lakes Great Inc | Lakewood | 501(c)(3) | 2023 | $0 | $0 | 2025-04 |
| Kelleys Island Trail and Bike Association | Kelleys Is | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Komeza Foundation | Columbus | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Kucinich Institute for Human and Ecological Security | Cleveland | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| La Fleur de Terre Garden Club | Hicksville | 501(c)(7) | 2014 | $0 | $0 | 2025-09 |
| Lake Erie Advocates | Toledo | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Lake Erie Institute | Bedford | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Lake Logan Association Inc | Logan | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Lake Tomahawk Sportsmans Club | Negley | 501(c)(4) | 2015 | $0 | $0 | 2025-12 |
| Lake and Trails Organization | Macedonia | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Lake of Love Foundation | Dayton | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Land Conservancy Inc | Westerville | 501(c)(3) | 2002 | $0 | $0 | 2024-12 |
| Las Gralarias Foundation Inc | Bluffton | 501(c)(3) | 2007 | $110,688 | 2025-12 | |
| Lead for Pollinators | Akron | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Leave No Child Inside Central Ohio Collaborative | Columbus | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Lebanon Council of Garden Clubs Inc | Lebanon | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Lessons From the Garden Inc | Miamisburg | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Liberty Conservation Club Inc | Ada | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Licking County Master Gardener Volunteers | Newark | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Lima Garden Club | Wapakoneta | 501(c)(4) | 2005 | $0 | $0 | 2025-12 |
| Lino and Jeannette Deanna Conservation Trust | Elyria | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Linworth School Community Garden | Worthington | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Lisbon Area Coon Hunters Club Inc | Salem | 501(c)(4) | 2019 | $0 | $0 | 2025-12 |
| Lisbon Landmark Foundation | Lisbon | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Local Motives Inc | Columbus | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Loco Yaks | South Amherst | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Logan County Land Trust | Bellefontaine | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Lorain County Youth Brigade | Amherst | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Loramie Watershed Association Inc | Fort Loramie | 501(c)(3) | 1994 | $0 | $0 | 2025-12 |
| Love Our Land Ohio | Loveland | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Loving the Misunderstood Foundation | Columbus | 501(c)(3) | 2026 | |||
| Lowellville Parent Teacher Organization | Lowellville | 501(c)(3) | 2013 | $0 | $0 | 2025-06 |
| Lucasville Valley Garden Club | Lucasville | 501(c)(3) | 2022 | $0 | $0 | 2025-08 |
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.