Data / Nonprofits / Illinois / Environment
Environment nonprofits in Illinois: 651 registered with the IRS
651 environment nonprofits are registered with the IRS in Illinois, 617 of them 501(c)(3) charities; the 216 that report revenue took in $415.8 million. The most are in Chicago (146), Springfield (18), Naperville (17). The largest by revenue: Chicago Horticultural Society ($68.1 million), Elevate Energy ($60.9 million), Morton Arboretum ($57.8 million).
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The 500 largest by revenue
| Organization | City | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Chicago Horticultural Society | Glencoe | 501(c)(3) | 1949 | $68.1 million | $359.1 million | 2024-12 |
| Elevate Energy | Chicago | 501(c)(3) | 2013 | $60.9 million | $58.3 million | 2024-12 |
| Morton Arboretum | Lisle | 501(c)(3) | 1925 | $57.8 million | $367.6 million | 2024-12 |
| Water Quality Association | Lisle | 501(c)(6) | 1975 | $15.9 million | $15 million | 2025-12 |
| Environmental Law & Policy Center of the Midwest | Chicago | 501(c)(3) | 1993 | $12.1 million | $45.6 million | 2025-06 |
| Urban Sustainability Directors Network | Chicago | 501(c)(3) | 2019 | $11.3 million | $16.7 million | 2024-12 |
| Lake Forest Open Lands Association | Mettawa | 501(c)(3) | 1968 | $9.4 million | $91 million | 2026-03 |
| Conservation Foundation | Naperville | 501(c)(3) | 1973 | $7.5 million | $21.2 million | 2025-06 |
| Midwest Energy Efficiency Alliance | Chicago | 501(c)(3) | 2001 | $6.1 million | $3.7 million | 2025-06 |
| Climate Vault Inc | Chicago | 501(c)(3) | 2021 | $6 million | $18.6 million | 2024-11 |
| Current Innovation NFP | Chicago | 501(c)(3) | 2016 | $5.9 million | $4.4 million | 2024-12 |
| Jo Daviess Conservation Foundation Inc | Elizabeth | 501(c)(3) | 1994 | $5.4 million | $25.7 million | 2025-12 |
| Center for Neighborhood Technology | Chicago | 501(c)(3) | 1978 | $5.3 million | $3.6 million | 2025-12 |
| Preservation Foundation of the Lakecounty Forest Preserves | Libertyville | 501(c)(3) | 2007 | $4.4 million | $16.1 million | 2025-12 |
| Natural Land Institute | Rockford | 501(c)(3) | 1960 | $4.2 million | $26.1 million | 2025-12 |
| Citizens for Conservation Inc | Barrington | 501(c)(3) | 1971 | $4 million | $28.1 million | 2025-12 |
| Evanston Rebuilding Warehouse | Evanston | 501(c)(3) | 2012 | $4 million | $3.2 million | 2024-12 |
| Garfield Park Conservatory Alliance | Chicago | 501(c)(3) | 1998 | $3.9 million | $7.6 million | 2025-06 |
| Bond Madison Water Company | Pocahontas | 501(c)(12) | 1999 | $3.9 million | $12.3 million | 2025-12 |
| Illinois Audubon Society | Springfield | 501(c)(3) | 1942 | $3.8 million | $56.5 million | 2025-03 |
| Friends of the Forest Preserves | Chicago | 501(c)(3) | 2004 | $3.8 million | $2.5 million | 2025-12 |
| Council of Great Lakes Governors Inc | Rolling MDWS | 501(c)(3) | 1985 | $3.8 million | $3.7 million | 2025-06 |
| Cub Consumer Education and Researchfund | Chicago | 501(c)(3) | 2006 | $3.7 million | $2 million | 2024-12 |
| Evergreen Climate Innovations | Chicago | 501(c)(3) | 2011 | $3.7 million | $19.2 million | 2024-12 |
| Friends of Wildlife Prairie Park | Hanna City | 501(c)(3) | 2018 | $3.5 million | $16.4 million | 2026-02 |
| The Wetlands Initiative | Chicago | 501(c)(3) | 1999 | $3.5 million | $12.7 million | 2024-12 |
| Kindness Campaign | Chicago | 501(c)(3) | 2017 | $3.4 million | $832,392 | 2024-12 |
| Passive House Institute Us Inc | Chicago | 501(c)(3) | 2024 | $3.4 million | $3.3 million | 2024-12 |
| Rockford Park District Foundation | Rockford | 501(c)(3) | 1980 | $3.4 million | $12.7 million | 2025-12 |
| Anderson Gardens | Rockford | 501(c)(3) | 1998 | $3.2 million | $14.4 million | 2025-12 |
| Illinois Environmental Council Education Fund | Springfield | 501(c)(3) | 1976 | $3 million | $4.2 million | 2024-12 |
| Brushwood Center at Ryerson Woods | Riverwoods | 501(c)(3) | 1994 | $3 million | $6.1 million | 2026-03 |
| Living Lands & Waters | East Moline | 501(c)(3) | 1998 | $2.8 million | $5.4 million | 2025-12 |
| Heartlands Conservancy | Belleville | 501(c)(3) | 1991 | $2.8 million | $5 million | 2025-12 |
| Prairie Rivers Network | Champaign | 501(c)(3) | 1968 | $2.8 million | $7 million | 2025-12 |
| Green Era Educational NFP | Chicago | 501(c)(3) | 2013 | $2.7 million | $11.5 million | 2024-12 |
| Healthy Schools Campaign | Chicago | 501(c)(3) | 2000 | $2.4 million | $2.4 million | 2024-12 |
| The Dupage River Salt Creek Work Group | Naperville | 501(c)(4) | 2007 | $2.3 million | $11.2 million | 2026-02 |
| Youth Conservation Corps | Waukegan | 501(c)(3) | 1995 | $2.1 million | $773,461 | 2024-12 |
| Black Oaks Center for Sustainable Renewable Living NFP | Chicago | 501(c)(3) | 2008 | $2.1 million | $2.8 million | 2024-12 |
| Illinois Park and Recreation Association | Hinsdale | 501(c)(3) | 2002 | $2 million | $2.9 million | 2024-12 |
| Grand Prairie Friends | Urbana | 501(c)(3) | 1985 | $1.8 million | $7.7 million | 2025-12 |
| Southeast Environmental Task Force | Chicago | 501(c)(3) | 1999 | $1.7 million | $1.9 million | 2024-12 |
| Alliance for Water Efficiency NFP | Chicago | 501(c)(3) | 2007 | $1.7 million | $1.4 million | 2025-12 |
| Food for Climate League Inc | Evanston | 501(c)(3) | 2020 | $1.6 million | $869,457 | 2024-12 |
| U S Green Building Council-Illinois Chapter | Chicago | 501(c)(3) | 2004 | $1.5 million | $1.1 million | 2025-12 |
| Thorium Energy Alliance | Harvard | 501(c)(3) | 2022 | $1.4 million | $1.6 million | 2025-12 |
| Abraham Lincoln Memorial Garden Foundation | Springfield | 501(c)(3) | 1954 | $1.2 million | $7.3 million | 2025-03 |
| Illinois Conservation Foundation | Springfield | 501(c)(3) | 1995 | $1.2 million | $7.5 million | 2025-06 |
| Huisingh Family Foundation | Fulton | 501(c)(3) | 2025 | $1.2 million | $1.5 million | 2025-12 |
| Clean Energy Jobs and Justice Fund | Chicago | 501(c)(3) | 2023 | $1.1 million | $2.2 million | 2025-12 |
| The Gaia-Movement Living Earth Green World Action USA Inc | Chicago | 501(c)(3) | 1999 | $1.1 million | $736,662 | 2025-12 |
| A M Huntington Trust Fbo Brookgreen Gardens PV 3584 | Chicago | 501(c)(3) | 1971 | $1.1 million | $11.6 million | 2025-07 |
| Friends of Nachusa Grasslands | Franklin GRV | 501(c)(3) | 2009 | $1 million | $7.6 million | 2025-06 |
| Climate Jobs Illinois Education Fund | Springfield | 501(c)(3) | 2023 | $975,299 | $312,911 | 2024-12 |
| Urban Rivers Inc | Chicago | 501(c)(3) | 2016 | $942,073 | $953,283 | 2024-12 |
| Scarce | Wheaton | 501(c)(3) | 1997 | $877,836 | $2.2 million | 2024-12 |
| Seven Generations Ahead | Oak Park | 501(c)(3) | 2001 | $863,051 | $155,878 | 2024-12 |
| Quad City Botanical Center Foundation | Rock Island | 501(c)(3) | 1987 | $859,903 | $5.1 million | 2025-06 |
| Ecology Action Center | Normal | 501(c)(3) | 1985 | $846,546 | $791,883 | 2025-06 |
| Friends of Illinois Nature Preserves | Dekalb | 501(c)(3) | 2020 | $831,423 | $345,968 | 2025-06 |
| Renewable Natural Resources Foundation | Schaumburg | 501(c)(3) | 1972 | $788,023 | $19.9 million | 2024-12 |
| Klehm Arboretum and Botanic Garden Inc | Rockford | 501(c)(3) | 1994 | $750,971 | $388,507 | 2025-10 |
| Prairie Hills Resource Conservation and Development Inc | Macomb | 501(c)(3) | 1987 | $709,327 | $7.1 million | 2025-12 |
| Central States Water Pollution Control Association Inc | Crystal Lake | 501(c)(3) | 1979 | $694,479 | $406,480 | 2025-12 |
| Neighbors for Environmental Justice Inc | Chicago | 501(c)(3) | 2019 | $693,872 | $837,442 | 2024-12 |
| Tree Fund-Tree Research & Education Endowment Fund | Naperville | 501(c)(3) | 1977 | $686,919 | $6.3 million | 2024-12 |
| Big Medicine NFP | Chicago | 501(c)(3) | 2014 | $677,452 | $128,312 | 2024-12 |
| Saving Tomorrows Agriculture Resources | Champaign | 501(c)(3) | 2024 | $647,711 | $203,689 | 2025-12 |
| Shawnee Resource Conservation and Development Area Inc | Golconda | 501(c)(3) | 2007 | $615,078 | $240,454 | 2025-09 |
| Five Hands Foundation Inc | Cntry CLB HLS | 501(c)(3) | 2010 | $610,234 | $100,888 | 2025-12 |
| Friends of the Shawnee National Forest | Carbondale | 501(c)(3) | 2014 | $609,391 | $22,890 | 2024-12 |
| Evolve Foundation | Chicago | 501(c)(3) | 2024 | $593,945 | $270,687 | 2025-12 |
| Great Rivers Land Preservation Association Inc | Alton | 501(c)(3) | 1993 | $538,618 | $15.1 million | 2024-12 |
| Forest Preserve Foundation Inc | Chicago | 501(c)(3) | 2013 | $520,535 | $381,541 | 2024-12 |
| Degrowth Institute | Chicago | 501(c)(3) | 2024 | $518,865 | $453,217 | 2024-12 |
| Friends of Central Algoma Land Trust | Lake Forest | 501(c)(3) | 2001 | $510,762 | $118,217 | 2025-12 |
| Expeditions in Education Inc | Chicago | 501(c)(3) | 2020 | $481,314 | $200,440 | 2025-12 |
| Earth Rangers USA Foundation | Chicago | 501(c)(3) | 2022 | $456,652 | $1.1 million | 2025-12 |
| Lake Katherine Nature Center and Botanic Gardens | Palos Heights | 501(c)(3) | 1998 | $423,632 | $573,540 | 2024-12 |
| Chicago Gateway Green Committee | Chicago | 501(c)(3) | 1993 | $418,444 | $340,023 | 2025-12 |
| Keep Northern Illinois Beautiful Inc | Rockford | 501(c)(3) | 1993 | $412,077 | $590,897 | 2025-06 |
| Friends of the Forest Preserve District of Dupage County | Wheaton | 501(c)(3) | 2011 | $401,649 | $998,085 | 2025-12 |
| Idea Store Creative Reuse Center | Urbana | 501(c)(3) | 2019 | $392,735 | $183,281 | 2025-12 |
| Water Quality Research Foundation | Lisle | 501(c)(3) | 1961 | $369,501 | $5.6 million | 2025-12 |
| Lake Forest Garden Club | Lake Forest | 501(c)(3) | 1964 | $365,951 | $726,477 | 2025-06 |
| McHenry County Conservation Foundation | Ringwood | 501(c)(3) | 2000 | $363,000 | $1.9 million | 2025-06 |
| Illinois Grazing Lands Coalition | Breese | 501(c)(3) | 2024 | $351,021 | $45,407 | 2025-12 |
| Pacific Environmental Coalition | Chicago | 501(c)(4) | 2020 | $339,489 | $956,077 | 2024-12 |
| Our World Underwater Scholarship Society | Woodridge | 501(c)(3) | 1980 | $328,808 | $1.2 million | 2025-05 |
| Cofan Survival Fund Inc | Oak Park | 501(c)(3) | 1999 | $319,861 | $69,021 | 2025-12 |
| Champaign County Environmental Stewards | Champaign | 501(c)(3) | 2019 | $313,037 | $807,751 | 2024-12 |
| Environmental Law and Policy Center Action Fund | Chicago | 501(c)(4) | 2014 | $309,419 | $915,178 | 2025-06 |
| One Earth Collective | Chicago | 501(c)(3) | 2015 | $298,523 | $43,534 | 2025-06 |
| Friends of the Highwood Public Library | Highwood | 501(c)(3) | 2019 | $296,740 | $1.3 million | 2025-04 |
| Illinois Water Environment Association | Chicago | 501(c)(3) | 1989 | $294,733 | $263,465 | 2025-06 |
| Ballard Family Nature Center Inc | Altamont | 501(c)(3) | 2000 | $294,254 | $2.7 million | 2025-12 |
| Stillman Nature Center | S Barrington | 501(c)(3) | 1982 | $278,584 | $6.3 million | 2025-12 |
| Land Conservation Foundation | Urbana | 501(c)(3) | 2003 | $262,318 | $1.6 million | 2024-12 |
| Lower Dupage River Watershed Coalition | Naperville | 501(c)(3) | 2014 | $261,628 | $1.9 million | 2026-02 |
| Wood St Collective | Chicago | 501(c)(3) | 2023 | $249,429 | $133,226 | 2026-01 |
| Trust U/a Dated May 6 1940 F/b/o Brookgreen Gardens | Chicago | 501(c)(3) | 1971 | $247,188 | $2.8 million | 2025-07 |
| Fox River Study Group | Oswego | 501(c)(3) | 2005 | $244,230 | $823,686 | 2025-12 |
| Green Earth Inc | Carbondale | 501(c)(3) | 1975 | $238,093 | $1.1 million | 2026-04 |
| Chicago Audubon Society | Chicago | 501(c)(3) | 1973 | $233,698 | $921,359 | 2024-12 |
| Pilsen Environmental Rights and Reform Organization | Chicago | 501(c)(3) | 2018 | $233,212 | $413,559 | 2025-12 |
| Climate Action Evanston | Evanston | 501(c)(3) | 2012 | $232,782 | $172,480 | 2025-12 |
| Flint Creek Wildlife Rehabilitation | Barrington | 501(c)(3) | 2004 | $228,588 | $320,618 | 2024-12 |
| Environmental Defenders of McHenry County Inc | Woodstock | 501(c)(3) | 1972 | $228,173 | $1.2 million | 2024-12 |
| The Recyclery Collective | Chicago | 501(c)(3) | 2009 | $227,204 | $161,596 | 2024-12 |
| Barrington Area Conservation Trust Inc | Barrington | 501(c)(3) | 2003 | $224,341 | $3.1 million | 2024-12 |
| Light Up Lawndale Inc | Chicago | 501(c)(3) | 2022 | $222,475 | $1,840 | 2024-12 |
| Submersible Wastewater Pump Association | Skokie | 501(c)(6) | 1992 | $222,255 | $35,573 | 2024-12 |
| Friends of the Green Bay Trail | Glencoe | 501(c)(3) | 2015 | $215,793 | $1.7 million | 2025-12 |
| Climate Jobs Illinois Inc | Springfield | 501(c)(4) | 2025 | $215,028 | $528,259 | 2025-12 |
| Ethanol Plant Managers Group NFP | Hennepin | 501(c)(6) | 2020 | $211,743 | $333,415 | 2024-12 |
| Macon County Conservation Foundation | Decatur | 501(c)(3) | 1981 | $197,020 | $2.1 million | 2026-03 |
| Kane Forest Preserve Foundation | Geneva | 501(c)(3) | 2016 | $184,937 | $184,150 | 2025-06 |
| Illinois Chapter-American Society of Landscape Architects | Oak Brook | 501(c)(6) | 2014 | $173,254 | $52,170 | 2025-12 |
| Willowbrook Economic Development Partnership | Willowbrook | 501(c)(3) | 2025 | $170,000 | $138,641 | 2026-04 |
| Saint Mary of Nazareth Medical Staf F NFP | Chicago | 501(c)(7) | 2026 | $168,296 | $508,122 | 2025-12 |
| Friends of the Sangamon Valley | Springfield | 501(c)(3) | 2000 | $164,003 | $3.4 million | 2025-12 |
| Clifftop NFP | Maeystown | 501(c)(3) | 2008 | $162,412 | $4.8 million | 2026-02 |
| Chicago Area Waterways Chloride Workgroup | Naperville | 501(c)(3) | 2022 | $154,198 | $124,240 | 2025-06 |
| Spotlight Air Environmental | Urbana | 501(c)(3) | 2021 | $150,000 | $171,983 | 2025-12 |
| Nature at the Confluence Inc | South Beloit | 501(c)(3) | 2018 | $149,929 | $169,183 | 2025-12 |
| Bluestem Hall Nature School NFP | Urbana | 501(c)(3) | 2022 | $149,589 | $15,951 | 2025-06 |
| Lakeforest Development Foundation | Buffalo Grove | 501(c)(3) | 2021 | $146,256 | $2.1 million | 2024-12 |
| Illinois Forestry Association | Chatham | 501(c)(3) | 2006 | $145,567 | $927,714 | 2025-12 |
| Garden Clubs of Illinois Inc | Elmhurst | 501(c)(3) | 1945 | $143,144 | $787,752 | 2026-03 |
| Accelerate Climate Solutions | Naperville | 501(c)(3) | 2023 | $141,012 | $29,531 | 2025-12 |
| Friends of the Fox River | West Dundee | 501(c)(3) | 1990 | $140,906 | $132,388 | 2024-12 |
| Lake Property Owners Association of Lake Zurich | Lake Zurich | 501(c)(7) | 2025 | $140,564 | $165,281 | 2025-12 |
| Homewood Izaak Walton Preserve Inc | Homewood | 501(c)(3) | 2015 | $133,951 | $428,986 | 2025-08 |
| Two Rivers Resource Conservation and Development | Pittsfield | 501(c)(3) | 1974 | $132,301 | $312,104 | 2025-12 |
| Nordson Green Earth Foundation | Chicago | 501(c)(3) | 2022 | $127,075 | $77,898 | 2025-12 |
| American Hosta Society | Savoy | 501(c)(3) | 1995 | $120,961 | $415,857 | 2025-12 |
| Lake Bluff Open Lands Association | Lake Bluff | 501(c)(3) | 1981 | $114,225 | $1.2 million | 2024-12 |
| Bronzeville Trail Task Force Inc | Chicago | 501(c)(3) | 2021 | $112,802 | $442,820 | 2024-12 |
| Moses West Foundation | Highland Park | 501(c)(3) | 2022 | $111,635 | $34,411 | 2024-12 |
| Campton Township Open Space Foundation | St Charles | 501(c)(3) | 2017 | $110,494 | $79,920 | 2025-12 |
| Play for All Playground and Garden | Wheaton | 501(c)(3) | 2014 | $107,784 | $235,466 | 2025-12 |
| Middle Rock Conservation Partners | Franklin GRV | 501(c)(3) | 2017 | $107,287 | $1.3 million | 2025-12 |
| Clean Up - Give Back Org | Des Plaines | 501(c)(3) | 2023 | $104,016 | $199,874 | 2024-12 |
| Starved Rock Historical & Education Al Foundation | Utica | 501(c)(3) | 1996 | $96,519 | $138,341 | 2025-12 |
| Land for Learning Institute | Buncombe | 501(c)(3) | 2004 | $89,024 | $17,224 | 2024-12 |
| Nature Preserve Foundation | Edwardsville | 501(c)(3) | 1994 | $88,641 | $332,928 | 2025-12 |
| Chicago Muslims Green Team | Chicago | 501(c)(3) | 2020 | $86,172 | $12,165 | 2025-12 |
| Protect Our Parks | Chicago | 501(c)(3) | 2008 | $85,054 | $20,404 | 2024-12 |
| Faith in Place Action Fund | Chicago | 501(c)(4) | 2017 | $84,255 | $26,146 | 2025-12 |
| Citizens United for Responsible Energy Development NFP | Aviston | 501(c)(6) | 2025 | $83,100 | $132 | 2025-03 |
| North Lawndale Greening Committee | Chicago | 501(c)(3) | 2001 | $80,675 | $127,187 | 2025-12 |
| The Calumet Region Chapter of the Izaak Walton League of America | Dolton | 501(c)(7) | 2008 | $80,491 | $26,963 | 2025-12 |
| Yucatan Environmental Foundation | Riverside | 501(c)(3) | 2001 | $75,989 | $27,501 | 2025-12 |
| Cress Creek Garden Club of Naperville Inc | Naperville | 501(c)(3) | 2015 | $73,606 | $30,980 | 2026-05 |
| Friends of Glen Ellyn Parks | Glen Ellyn | 501(c)(3) | 2015 | $73,241 | $115,455 | 2025-12 |
| Evanston Environmental Association | Evanston | 501(c)(3) | 1977 | $70,682 | $591,145 | 2024-12 |
| Kenilworth Garden Club | Wilmette | 501(c)(3) | 1980 | $69,920 | $202,622 | 2025-06 |
| Cache Bayou Outfitters Inc | Ullin | 501(c)(3) | 2023 | $67,456 | $105 | 2025-12 |
| Lake Michigan States Section of the Air & Waste Management Assocation | Palatine | 501(c)(3) | 1983 | $66,605 | $10,261 | 2025-12 |
| Mid Central Water Works Association | Oswego | 501(c)(3) | 2011 | $66,457 | $10,746 | 2025-12 |
| Mississippi River Confluence Foundation | East Alton | 501(c)(3) | 2019 | $60,675 | $374,813 | 2025-12 |
| Naperville Garden Club Incorporated | Naperville | 501(c)(3) | 1981 | $59,550 | $136,227 | 2025-04 |
| Friends of Sears Sunken Garden | Chicago | 501(c)(3) | 2022 | $51,359 | $1.3 million | 2025-12 |
| Friends of Catherine and Channel Lakes | Chicago | 501(c)(3) | 2016 | $51,195 | $160,884 | 2025-12 |
| Envirosolutions Institute | Chicago | 501(c)(3) | 2022 | $50,000 | $30,000 | 2024-12 |
| Beautify Decatur Coalition | Decatur | 501(c)(3) | 2019 | $48,282 | $76,122 | 2025-12 |
| Winnetka Garden Club | Winnetka | 501(c)(3) | 1969 | $47,414 | $117,162 | 2025-06 |
| Mississippi Bird Migration Flyway-Lake Senachwine and Goose | St Charles | 501(c)(3) | 2016 | $47,200 | $329,688 | 2025-12 |
| Sugar Grove Foundation | McLean | 501(c)(3) | 1995 | $46,830 | $2.6 million | 2025-12 |
| Getting Grown Collective Incorporated NFP | Chicago | 501(c)(5) | 2020 | $44,684 | $24,072 | 2024-12 |
| Pottawatomie Garden Club of St Charles | Saint Charles | 501(c)(3) | 2003 | $42,698 | $278,705 | 2025-12 |
| Global Water Works | Libertyville | 501(c)(3) | 2021 | $40,730 | $2,268 | 2025-12 |
| Taam Teva | Northbrook | 501(c)(3) | 2019 | $38,500 | $30,600 | 2025-12 |
| Southern Illinois Prescribed Burn Association | Golconda | 501(c)(3) | 2008 | $34,094 | $58,307 | 2025-12 |
| Decatur Audubon Society | Decatur | 501(c)(3) | 1981 | $33,836 | $249,272 | 2025-06 |
| Puerto Rican Agenda | Chicago | 501(c)(3) | 2019 | $32,150 | $174,801 | 2025-12 |
| Garden Club of Barrington | Barrington | 501(c)(3) | 1999 | $31,605 | $117,042 | 2025-12 |
| Apple Canyon Lake Property Owners Foundation | Apple River | 501(c)(3) | 2018 | $30,890 | $149,420 | 2025-12 |
| North Fork Conservation Club Inc Zook Lake Road | Hoopeston | 501(c)(4) | 2015 | $30,629 | $2,753 | 2025-12 |
| Rock River Watershed Group | Rockford | 501(c)(3) | 2021 | $30,151 | $290,794 | 2025-12 |
| Illinois Recycling Foundation | Geneva | 501(c)(3) | 2020 | $30,067 | $31,023 | 2025-06 |
| Klehm Arboretum Foundation | Rockford | 501(c)(3) | 2006 | $29,883 | $526,902 | 2025-10 |
| Wisdom of Owls | Saint Charles | 501(c)(3) | 2025 | $26,889 | $3,100 | 2024-12 |
| Build Solar Inc | Urbana | 501(c)(3) | 2023 | $26,500 | $29,349 | 2025-12 |
| 350 Chicago NFP | Chicago | 501(c)(3) | 2020 | $25,457 | $93,877 | 2025-06 |
| Izaak Walton League of America Inc | Des Plaines | 501(c)(3) | 1985 | $25,022 | $69,950 | 2025-12 |
| Sachas Sashay | Mackinaw | 501(c)(3) | 2023 | $22,764 | $39,351 | 2025-12 |
| Garden Guild of Winnetka | Winnetka | 501(c)(3) | 1978 | $22,480 | $120,802 | 2025-06 |
| Riverwalk Bicentennial Fund | Naperville | 501(c)(3) | 2023 | $22,196 | $729,834 | 2025-12 |
| Oak Lawn Parks Foundation | Oak Lawn | 501(c)(3) | 1993 | $21,602 | $51,226 | 2025-12 |
| Deep Roots Project | Oak Park | 501(c)(3) | 2018 | $16,998 | $7,833 | 2026-03 |
| Keep Vermilion County Beautiful Inc | Danville | 501(c)(3) | 2003 | $16,065 | $59,144 | 2025-06 |
| Peoria Garden Club | Washington | 501(c)(3) | 1991 | $14,939 | $31,404 | 2025-06 |
| Central Illinois Hosta Society | Dunlap | 501(c)(3) | 2005 | $14,411 | $19,510 | 2025-12 |
| Enos Park Neighborhood Improvement Association | Springfield | 501(c)(3) | 2025 | $14,246 | $48,697 | 2024-12 |
| Friends of the Hennepin Canal | Ladd | 501(c)(3) | 2010 | $13,871 | $169,786 | 2025-12 |
| My Mothers Community Garden Inc | Peoria | 501(c)(3) | 2022 | $12,031 | $133 | 2025-12 |
| Bloomingdale Park Foundation | Bloomingdale | 501(c)(3) | 1994 | $9,756 | $29,854 | 2025-12 |
| Galena S Living History Alliance NFP | Galena | 501(c)(3) | 2023 | $8,801 | $11,810 | 2025-12 |
| Reuse Depot Inc | Maywood | 501(c)(3) | 2019 | $5,078 | $2,257 | 2024-12 |
| Champaign County Soil and Water Conservation District Foundation | Champaign | 501(c)(3) | 2016 | $4,537 | $182,214 | 2025-12 |
| Friends of Winnslie Parkway | Chicago | 501(c)(3) | 2019 | $4,244 | $4,144 | 2025-12 |
| Lake Affect Foundation | Chicago | 501(c)(3) | 2024 | $4,000 | $4,000 | 2024-12 |
| Old Town Neighborhood Foundation | Chicago | 501(c)(3) | 2015 | $3,265 | $331,184 | 2024-12 |
| Fox Ridge Foundation | Charleston | 501(c)(3) | 2014 | $2,655 | $20,146 | 2025-12 |
| Women and Child Development Wacd USA Inc | Moline | 501(c)(3) | 2023 | $2,500 | $80 | 2025-12 |
| Save Our Illinois Land | Bartlett | 501(c)(3) | 2017 | $2,137 | $54,664 | 2025-12 |
| Lake Forest Land Foundation | Mettawa | 501(c)(3) | 1989 | $2,100 | $28,510 | 2025-03 |
| Lueaster T Mertz Legacy Trust for the New York Botanical Garden | Chicago | 501(c)(3) | 2022 | $1,914 | $5.1 million | 2025-12 |
| Nippersink Watershed Association | Wonder Lake | 501(c)(3) | 2011 | $1,767 | $333,969 | 2025-06 |
| Annas Garden NFP Inc | Sheridan | 501(c)(3) | 2014 | $1,215 | $741 | 2025-12 |
| Original Kaskaskia Area Wilderness Inc | Okawville | 501(c)(3) | 1998 | $849 | $10,902 | 2025-12 |
| Carbon Capture Tree Farm Co NFP | Chicago | 501(c)(3) | 2023 | $220 | $1,686 | 2025-12 |
| Air Support Project | Chicago | 501(c)(3) | 2024 | $114 | $552,483 | 2024-12 |
| Construction & Demolition Recycling Association | Chicago | 501(c)(3) | 1998 | $1 | $17,822 | 2024-12 |
| 1 for Community | Niles | 501(c)(3) | 2023 | $2,477 | 2025-12 | |
| 350 Kishwaukee | Dekalb | 501(c)(3) | 2016 | $0 | $0 | 2023-12 |
| 40&8 Voiture 405 | Danville | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| 95TH Street Garden | Belleville | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Aarrk Garden | Hebron | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| Abhimanu Singh | Buffalo Grove | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Adore Foundation Inc | Chicago | 501(c)(3) | 2024 | $0 | $1 | 2024-12 |
| African Diaspora Foundation | Romeoville | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Aid & Res | Bloomington | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Aigas Foundation Inc | Oak Brook | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Algonquin Garden Club | Algonquin | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| All in Together Now | Waukegan | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| American Natural Heritage Foundation and Mueller Fam Chartit | Galena | 501(c)(3) | 2001 | $1 | 2025-12 | |
| Ancient Oaks Foundation | Lake Zurich | 501(c)(3) | 2014 | $72,630 | 2025-12 | |
| Andrias Ark | Chicago | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Antioch Garden Club | Antioch | 501(c)(3) | 2018 | $0 | $0 | 2025-06 |
| Aos Chicago Judging Center | Crest Hill | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Aquatic Education Group | Rockford | 501(c)(3) | 1974 | $0 | $0 | 2026-07 |
| Arlington Heights Garden Club NFP | Arlington HTS | 501(c)(3) | 2023 | $0 | $0 | 2025-08 |
| Association for the Wolf Lake Initiative -A NFP Corporation- | Crete | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Aubrey Make A Memory Foundation | Glen Ellyn | 501(c)(3) | 2025 | $160,582 | 2025-06 | |
| Aull Nature Preserve | Lake Bluff | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Backcountry Champions Creative Stud Io Inc | Naperville | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Backyard Flower Friends | Winnetka | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Backyard Nature Center | Glencoe | 501(c)(3) | 2009 | $0 | $0 | 2024-06 |
| Barnhart Grove Prairie Restoration Project | Champaign | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Barrington Area Conservation Founders Fund Inc | Barrington | 501(c)(3) | 2026 | |||
| Batavia Orchid Society Incorporated | Warrenville | 501(c)(3) | 2004 | $0 | $0 | 2024-12 |
| Batavia Plain Dirt Gardeners Inc | Batavia | 501(c)(3) | 2005 | $0 | $0 | 2025-08 |
| Bee Haven | Mokena | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Bellamari Foundation | Chicago | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Bent of the River Sanctuary Trust P13210003 | Chicago | 501(c)(3) | 1993 | $10.5 million | 2025-12 | |
| Better Natures | Chicago | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Biofruitgradable Inc NFP | Evergreen PK | 501(c)(3) | 2024 | $0 | $0 | 2023-12 |
| Blackfoot Conversation Foundation | Frankfort | 501(c)(3) | 1999 | $751,310 | 2025-12 | |
| Blackfoot Valley Ranch Foundation | Frankfort | 501(c)(3) | 1997 | $2.7 million | 2025-12 | |
| Block X Block | Decatur | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Bonnie J and Robert G Stevenson Foundation Inc | McHenry | 501(c)(3) | 2017 | $10,675 | 2025-12 | |
| Boone-Dutch Creeks Watershed Alliance | Woodstock | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Botanical Futures Foundation NFP | Chicago | 501(c)(3) | 2025 | |||
| Bounce Back Recycle | Bolingbrook | 501(c)(3) | 2025 | |||
| Braided Roots NFP | McHenry | 501(c)(3) | 2026 | |||
| Brooks Sustainability Foundation NFP | Danville | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Butterfield Preservation Foundation | Lombard | 501(c)(3) | 2017 | $0 | $0 | 2026-04 |
| Byron Oregon Sportmans & Conservation Club Inc | Rockford | 501(c)(3) | 2014 | $0 | $0 | 2026-01 |
| Callies Enviromental Scientific Learning Center | Chicago | 501(c)(3) | 2025 | $0 | $1 | 2025-12 |
| Camp Vandeventer Inc | Waterloo | 501(c)(3) | 2022 | $2.5 million | 2025-12 | |
| Cannabeebee | Cahokia HGTS | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Caretakers of the Environment International USA Inc | Flossmoor | 501(c)(3) | 1991 | $0 | $0 | 2023-12 |
| Carol Stream Parks Foundation | Carol Stream | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Center for Transformation of Wastetechnology | Naperville | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Central States Dahlia Society | Lombard | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Chayah Solutions | Cntry CLB HLS | 501(c)(3) | 2025 | $0 | $0 | 2026-02 |
| Chicago Beach Cleanup | Arlington HTS | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Chicago Climate Connect | Chicago | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Chicago Excellence in Gardening Alliance | Chicago | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Chicago Native Garden Projects | Chicago | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Chicago Nature Seekers | Highland Park | 501(c)(3) | 2018 | $0 | $0 | 2026-06 |
| Chicago Recycling Coalition Inc | Chicago | 501(c)(3) | 1991 | $0 | $0 | 2025-12 |
| Children and Elders Forest | Normal | 501(c)(3) | 2013 | $0 | $0 | 2026-01 |
| Childrens Earth Foundation | Chicago | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Churchill Park Advisory Council | Chicago | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Circular Impact Network Inc | Buffalo Grove | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Citizens Against Predatory Pipelines | Chillicothe | 501(c)(4) | 2024 | $0 | $0 | 2025-12 |
| Citizens for A Cleaner Chicago NFP | Chicago | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Clarendon Hills Park Foundation | Clarendon HLS | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Clean Community | Chicago | 501(c)(3) | 2017 | $0 | $0 | 2023-12 |
| Clean Water for Rural Gambia | Chicago | 501(c)(3) | 2026 | |||
| Clear Ice King | Lincolnshire | 501(c)(3) | 2024 | $0 | $1 | 2025-12 |
| Clear Vision Impacts NFP | Kenilworth | 501(c)(3) | 2023 | $0 | $1 | 2025-12 |
| Cloudburst Collective | Apple River | 501(c)(3) | 2025 | |||
| Cob Connection | Chicago | 501(c)(3) | 2008 | |||
| Coles County SWCD Foundation NFP | Charleston | 501(c)(3) | 2004 | $0 | $0 | 2025-06 |
| Community Environmental Council | Decatur | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Community Share NFP | Monmouth | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Community Solar Solutions Inc | Barrington | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Connecting the Dots Project | Springfield | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Conservation Research Institute | Glen Ellyn | 501(c)(3) | 1998 | $0 | $0 | 2025-12 |
| Conserve Our Rural Ecosystem | Ottawa | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Conspirators Action Coalition | Lake Forest | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Cool Globes Inc | Highland Park | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Core Friends of Rend Lake | Benton | 501(c)(3) | 2025 | $0 | $0 | 2025-09 |
| Corporate Climate Alliance Incorporated | Chicago | 501(c)(3) | 2018 | $1,544 | 2025-12 | |
| Crabtree Cemetery PC Trust | Litchfield | 501(c)(13) | 2013 | $0 | $0 | 2025-12 |
| Crawford County Forest Preserve Foundation | Robinson | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Crews and Brews NFP | Mokena | 501(c)(3) | 2021 | $0 | $0 | 2025-07 |
| Crooked Lake Improvement Committee | Lindenhurst | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Cultivated With Care Inc | Charleston | 501(c)(3) | 2021 | $2,380 | 2025-12 | |
| Darien Garden Club | Darien | 501(c)(4) | 2016 | $0 | $0 | 2025-12 |
| Dayona Farm Foundation | Dixon | 501(c)(3) | 2023 | $0 | $0 | 2025-05 |
| Deerpath Garden Club of Lake Forest | Deer Park | 501(c)(3) | 2007 | $0 | $0 | 2025-06 |
| Dellwood Foundation Inc | Lockport | 501(c)(3) | 1992 | $0 | $0 | 2025-12 |
| Delta Redevelopment Institute | Chicago | 501(c)(3) | 1999 | $0 | $0 | 2025-06 |
| Depue Citizens Advisory Group | Depue | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Diverse Metamorphosis | Peoria | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Do Your Part Recycling Inc | Orient | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Doe Run Education Works Inc NFP | Roodhouse | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Douglas Discovery Garden Inc | Danville | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Duck Lake Waterway Association | Ingleside | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Dupage Environmental Preservation Inc | Medinah | 501(c)(3) | 2001 | $716,000 | 2024-12 | |
| Earth Hero | Chicago | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Earth S Friends Inc NFP | Bartlett | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Earthbeat Inc | Rockford | 501(c)(3) | 2006 | $0 | $0 | 2024-12 |
| Earthtone Environmental Group | Chicago | 501(c)(3) | 2010 | $0 | $0 | 2024-12 |
| Eastside Anglers Inc | Chicago | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Eco Circle International Incorporated | Highland Park | 501(c)(3) | 2021 | $0 | $0 | 2023-12 |
| Eco-Link Connexus | Springfield | 501(c)(3) | 2025 | $61,774 | 2025-12 | |
| Ecopartners | Northbrook | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Ecorebuild Innovations | Beaverville | 501(c)(3) | 2024 | $0 | $1 | 2024-12 |
| Ecorise Academy NFP | Naperville | 501(c)(3) | 2023 | $0 | $0 | 2026-06 |
| Ecoship NFP | Chicago | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Ecotech Agrivillage CDC | Evergreen PK | 501(c)(3) | 2024 | |||
| Edgewater Environmental Coalition | Chicago | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Ego Death Theatre Collective | Chicago | 501(c)(3) | 2023 | $0 | $0 | 2025-06 |
| Ekgs for Egk | South Elgin | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Embrace the Lake | Litchfield | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Employ 2 Empower | Chicago | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Energize Am Inc | Naperville | 501(c)(3) | 2025 | |||
| Enos Park Neighborhood Gardens | Springfield | 501(c)(3) | 2025 | $0 | $0 | 2025-06 |
| Environmental Exchange | Chicago | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Esta Barrett Manor and Gardens Inc | Rockford | 501(c)(3) | 2002 | $6.4 million | 2024-12 | |
| Ev Clean Charging Inc | Chicago | 501(c)(3) | 2024 | |||
| Every Heart Matters Inc | Champaign | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Everyones Collective | Pontiac | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Feather Leaf Farm and Nature Center | Minooka | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Fermilab Natural Areas | Warrenville | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Fish for It NFP | Chicago | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Floodplains Forever Inc | Northfield | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Fokc NFP | West Peoria | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Foresight Design Initiative Inc | Chicago | 501(c)(3) | 2003 | $0 | $0 | 2026-06 |
| Forest Foundation of Kendall County | Yorkville | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Fresh Coast Communities | Chicago | 501(c)(3) | 2016 | $0 | $19,605 | 2025-09 |
| Fresh Water for Life | Vernon Hills | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Friends of Argyle Lake Foundation Inc | Macomb | 501(c)(3) | 2004 | $0 | $0 | 2024-12 |
| Friends of Butterfield Trail State Recreation Area | Gilman | 501(c)(3) | 2025 | $0 | $0 | 2025-02 |
| Friends of Crab Orchard Refuge Inc | Marion | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Friends of Cycling in Elk Grove | Arlington HTS | 501(c)(3) | 2014 | $0 | $0 | 2025-09 |
| Friends of Everbloom | Normal | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Friends of Henderson County Wildlife | Gladstone | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Friends of Lake Mattoon | Neoga | 501(c)(3) | 2002 | $0 | $0 | 2026-01 |
| Friends of Lake Shelbyville | Shelbyville | 501(c)(3) | 2000 | $0 | $0 | 2024-09 |
| Friends of Loomis Street Gardens | Chicago | 501(c)(3) | 2026 | |||
| Friends of Rosenblum Park LLC | Chicago | 501(c)(3) | 2026 | |||
| Friends of Shabbona Lake State Park | Shabbona | 501(c)(3) | 2015 | $0 | $0 | 2023-12 |
| Friends of the Auburn Parks | Auburn | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| Friends of the Bluff Spring Fen | Elgin | 501(c)(3) | 2007 | $0 | $0 | 2024-12 |
| Friends of the Calumet-Sag Trail | Blue Island | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Friends of the Forest | Benton | 501(c)(3) | 2026 | |||
| Friends of the Hybernia Nature Pres Erve Inc | Highland Park | 501(c)(3) | 2026 | |||
| Friends of the Illinois Supreme Court Historic Preservation | Springfield | 501(c)(3) | 2012 | $0 | $21,362 | 2024-12 |
| Friends of the Kickapoo Rail Trail | Oakwood | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Friends of the PHNRC NFP | Prospect HTS | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Friends of the Rock River Inc | South Beloit | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Friends of the Trails | Quincy | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Friends of the Tunnel Hill State Trail | Metropolis | 501(c)(3) | 2024 | $0 | $0 | 2023-12 |
| Friends of the Water Trails | Berwyn | 501(c)(3) | 2023 | $0 | $0 | 2026-06 |
| Future En Noir Foundation Inc | Chicago | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Garbage Gals | Chicago | 501(c)(3) | 2024 | $0 | $0 | 2025-05 |
| Garbageist Inc | Highland Park | 501(c)(3) | 2023 | $0 | $0 | 2025-04 |
| Garden Club of Evanston | Evanston | 501(c)(3) | 1963 | $0 | $0 | 2025-06 |
| Garden Guild of Highland Park | Highland Park | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Garden Prairie Park Improvement Association | Garden PR | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Gardeners of the North Shore | Lincolnwood | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Gardening 2 Grow | Lake Forest | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Garfield Ridge Clearing Community Gardens | Chicago | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Generation Untrashed Inc NFP | Chester | 501(c)(3) | 2025 | |||
| Generations Community Development Corporation | Chicago | 501(c)(3) | 2024 | |||
| Geneva Green Market NFP | Geneva | 501(c)(3) | 2008 | $0 | $0 | 2024-12 |
| Geo Exchange Information Bureau Inc | Springfield | 501(c)(3) | 1999 | $0 | $1 | 2024-12 |
| Gilbert Lake Advancement Association Inc | Cary | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Ginnfarms Corp | Sumner | 501(c)(3) | 2016 | $51,425 | 2024-12 | |
| Glenn Shoals Lake Club Inc | Hillsboro | 501(c)(3) | 2018 | $0 | $0 | 2026-03 |
| Glenview Golf Gardeners | Northfield | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Global Green Solutions and Studies NFP | Chicago | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Go Green Des Plaines | Des Plaines | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Go Green Glen Ellyn | Glen Ellyn | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Go Green Glencoe | Glencoe | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Go Green Lagrange A NFP Corp | La Grange | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Go Green Northbrook Inc | Northbrook | 501(c)(3) | 2020 | $0 | $0 | 2025-07 |
| Go Green Oak Lawn | Oak Lawn | 501(c)(3) | 2024 | |||
| Go Green Park Ridge | Park Ridge | 501(c)(4) | 2024 | $0 | $0 | 2025-12 |
| Go Green Wilmette NFP Inc | Wilmette | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Go Green Winnetka | Winnetka | 501(c)(3) | 2016 | $10,757 | 2025-12 | |
| Gratiot Lake Conservancy | Oak Brook | 501(c)(3) | 1998 | $13.1 million | 2025-12 | |
| Great Lakes Sport Fishing Council Inc | Elmhurst | 501(c)(3) | 1991 | $0 | $0 | 2025-12 |
| Great Rivers Prescribed Burn Association | Godfrey | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Green Actions 4 Earth | Chicago | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Green Fire Conservancy Inc | Saint Charles | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Green Minds LFLB | Lake Forest | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Green Roselle | Roselle | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Greener Grove Inc | Downers Grove | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Greenville Garden Club | Greenville | 501(c)(3) | 2026 | |||
| Hank Gianvecchio Natural Habitat Area Foundation | Bloomingdale | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Hanover Park Park Foundation | Hanover Park | 501(c)(3) | 1995 | $0 | $0 | 2026-04 |
| Healthy Lands Healthy People | Godfrey | 501(c)(3) | 2012 | $0 | $0 | 2024-12 |
| Helping M3 Help You Inc | Chicago | 501(c)(3) | 2024 | |||
| Helping Others Maintain Environmental Standards | Warren | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Highcountry Conservation Trust | Chicago | 501(c)(3) | 2026 | |||
| Homer Glen Foundation | Homer Glen | 501(c)(3) | 2006 | $0 | $0 | 2023-12 |
| Hsmai Chicago | Evanston | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Human Limit | Fox Lake | 501(c)(3) | 2024 | |||
| Ikebana International Chicago Chapter | Winnetka | 501(c)(3) | 2005 | $0 | $0 | 2026-06 |
| Il Association of Resource Conservation & Development Areas | Macomb | 501(c)(3) | 1995 | $0 | $0 | 2025-06 |
| Illini Solar Car | Urbana | 501(c)(3) | 2020 | $0 | $0 | 2025-08 |
| Illinois Association of Conservation Districts | Belvidere | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Illinois Association of Environmental Professionals | Rosemont | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Illinois Climbers Association | Carbondale | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Illinois Clinicians for Climate Act Ion | Vernon Hills | 501(c)(3) | 2026 | |||
| Illinois Dunesland Garden Club | Zion | 501(c)(3) | 2024 | $0 | $0 | 2025-07 |
| Illinois Mosquito and Vector Control Association | Northfield | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Illinois Orchid Society Inc | Deerfield | 501(c)(3) | 2013 | $0 | $0 | 2026-06 |
| Illinois Prairie Hosta Society | Savoy | 501(c)(7) | 2013 | $0 | $0 | 2025-12 |
| Illinois Renewable Energy Association Inc | Oregon | 501(c)(3) | 2003 | $0 | $2,785 | 2025-12 |
| Illinois River Valley Conservation Group | Varna | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Illinois Science and Energy Innovation Fund | Gilberts | 501(c)(3) | 2013 | $0 | $310 | 2024-12 |
| Illinois Soil and Water Conservation Districts Foundation | Springfield | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Imagine Haitian Inc NFP | Chicago | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Improve Our Communities | Wadsworth | 501(c)(3) | 2024 | $0 | $0 | 2023-12 |
| In the Gardens | Elmhurst | 501(c)(3) | 2018 | $0 | $0 | 2023-12 |
| Inner City Outdoors Inc | Cahokia HGTS | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Institute for Neotropical Conservation | Carbondale | 501(c)(3) | 2007 | $0 | $0 | 2026-06 |
| Institute of Global Energy Education Inc | Naperville | 501(c)(3) | 2020 | $0 | $0 | 2024-12 |
| Institute of Healthcare Connections | Chicago | 501(c)(3) | 2022 | $0 | $0 | 2025-10 |
| International Erosion Control Association | Dekalb | 501(c)(3) | 1979 | $0 | $0 | 2026-06 |
| Iseejustice40 | Alton | 501(c)(3) | 2026 | |||
| Izaak Walton League of America Inc | Crete | 501(c)(3) | 1968 | $0 | $0 | 2026-05 |
| Jackson Park Conservancy | Chicago | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Jade Marie Beasley Speak Life Foundation Inc | Marion | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Jens Jensen Gardens in Evanston | Evanston | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| John Wesley Powell Audubon Society | Normal | 501(c)(3) | 1976 | $0 | $0 | 2024-12 |
| Johnsie Fiock Fildes Nature Foundation LTD | Olney | 501(c)(3) | 2010 | $557,067 | 2024-12 | |
| Junior Garden Club of Lake Forest | Lake Forest | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Kankakee Kultivators Inc | Bourbonnais | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Kankakee River Basin Commission | Kankakee | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Karst Conservancy of Illinois Inc | Metamora | 501(c)(3) | 2000 | $0 | $0 | 2024-12 |
| Keeler Gardens NFP | Chicago | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Keep Carbondale Beautiful Inc | Carbondale | 501(c)(3) | 1994 | $0 | $0 | 2024-12 |
| Kenilworth Clippers | Kenilworth | 501(c)(7) | 2014 | $0 | $0 | 2025-12 |
| Kenilworth Council of Garden Clubs | Kenilworth | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Kewanee Chapter Izaak Walton League of America Inc | Kewanee | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Khanya Foundation Inc NFP | Waukegan | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Kickapoo Mud Creek Nature Conservancy | Oregon | 501(c)(3) | 2003 | $1 million | 2025-12 | |
| Kincaid Area Watershed Project Inc | Murphysboro | 501(c)(3) | 1998 | $0 | $0 | 2025-12 |
| Kiss My Glass Recycling NFP | O Fallon | 501(c)(3) | 2026 | |||
| Kristas Legacy Foundation | El Paso | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Kurtis Conservation Foundation | Libertyville | 501(c)(3) | 1997 | $3.2 million | 2025-12 | |
| LCLC Support Corporation | Chicago | 501(c)(3) | 2024 | $0 | $1 | 2025-06 |
| LWV Upper Mississippi River Region Inter League Organization | Naperville | 501(c)(3) | 2016 | $0 | $0 | 2025-06 |
| Ladies Civic Improvement Association of Chautauqua Ill | Elsah | 501(c)(4) | 2012 | $0 | $0 | 2025-12 |
| Lake Bluff Garden Club | Lake Bluff | 501(c)(5) | 1990 | $0 | $0 | 2025-12 |
| Lake Centralia Association Inc | Centralia | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Lake County Audubon Society | Libertyville | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Lake County Lake Lovers | Grayslake | 501(c)(3) | 2026 | |||
| Lake County Zebra Mussel Project Foundation | Round Lake | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Lake Lorraine Restoration and Protection Association Inc | Arlington HTS | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Lake Minear Foundation Inc | Libertyville | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Lake Shelbyville Fish Habitat Allia Nce | Sullivan | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Lakeridge Restoration Association | Long Grove | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Land Legacy Prairie Restoration | Yorkville | 501(c)(3) | 2024 | |||
| Lee A & Mary Jane Rieth Foundation for Environmental Education | Chicago | 501(c)(3) | 1996 | $21.7 million | 2025-12 | |
| Let Them Drink Water NFP | Chicago | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Level Up Movement Community Healing Hub | Chicago | 501(c)(3) | 2026 | |||
| Liam Hammonds Memorial Foundation | Flossmoor | 501(c)(3) | 2005 | $0 | $0 | 2025-05 |
| Lincoln Heritage Resource Conservation and Development NFP | Charleston | 501(c)(3) | 2002 | $0 | $0 | 2026-03 |
| Lincolnshire Garden Club | Lincolnshire | 501(c)(3) | 2012 | $0 | $0 | 2026-06 |
| Lingo Sanitation Community Development Corp | Chicago | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Lombard Garden Club Inc | Lombard | 501(c)(4) | 2010 | $0 | $0 | 2026-03 |
| Long Lake Improvement and Sanitatio Association | Ingleside | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Loon Lakes Mangt Association | Antioch | 501(c)(3) | 2015 | $0 | $0 | 2025-11 |
| Lorna J Konsis Memorial Foundation | Westville | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Lower Wabash Partnership Inc | Carmi | 501(c)(3) | 2026 | |||
| MS Mariposa Butterfly Resource Bus | Galesburg | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Macomb Beautiful Association | Macomb | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Mahomet Aquifer Consortium | Atlanta | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| McHenry County Audubon | Woodstock | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Menard County Trails and Greenways NFP | Petersburg | 501(c)(3) | 2020 | $0 | $0 | 2026-06 |
| Michael Gray Foundation of Dreams | Oak Park | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
| Midewin Interpretive Association | Wilmington | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Midewin Tallgrass Prairie Alliance | Joliet | 501(c)(3) | 1997 | $0 | $0 | 2024-12 |
| Midwest Bonsai Society | Highland Park | 501(c)(3) | 2026 | $0 | $0 | 2021-12 |
| Midwest Dahlia Conference | Elk Grove VLG | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Midwest Fruit Explorers | Markham | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Midwest Invasive Plant Network Inc | Lisle | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Midwest Society for Acoustic Ecology | Chicago | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
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.