Organizations
Largest first
By revenue on the last return. Organizations that file Form 990-N report no figures and come last.
| Organization | Return | Revenue |
|---|---|---|
| Environmental Defenders of McHenry County IncWoodstock | Form 990 | $228,173FY2024 |
| The Recyclery CollectiveChicago | Form 990 | $227,204FY2024 |
| Barrington Area Conservation Trust IncBarrington | Form 990 | $224,341FY2024 |
| Light Up Lawndale IncChicago | Form 990 | $222,475FY2024 |
| Friends of the Green Bay TrailGlencoe | Form 990 | $215,793FY2025 |
| Kane Forest Preserve FoundationGeneva | Form 990-EZ | $184,937FY2025 |
| Willowbrook Economic Development PartnershipWillowbrook | None required | $170,000FY2026 |
| Friends of the Sangamon ValleySpringfield | Form 990 | $164,003FY2025 |
| Clifftop NFPMaeystown | Form 990 | $162,412FY2026 |
| Chicago Area Waterways Chloride WorkgroupNaperville | Form 990-EZ | $154,198FY2025 |
| Spotlight Air EnvironmentalUrbana | Form 990-EZ | $150,000FY2025 |
| Nature at the Confluence IncSouth Beloit | Form 990-EZ | $149,929FY2025 |
| Lakeforest Development FoundationBuffalo Grove | Form 990 | $146,256FY2024 |
| Illinois Forestry AssociationChatham | Form 990 | $145,567FY2025 |
| Garden Clubs of Illinois IncElmhurst | Form 990 | $143,144FY2026 |
| Accelerate Climate SolutionsNaperville | Form 990-EZ | $141,012FY2025 |
| Friends of the Fox RiverWest Dundee | Form 990-EZ | $140,906FY2024 |
| Homewood Izaak Walton Preserve IncHomewood | Form 990-EZ | $133,951FY2025 |
| Two Rivers Resource Conservation and DevelopmentPittsfield | Form 990-EZ | $132,301FY2025 |
| Nordson Green Earth FoundationChicago | Form 990-EZ | $127,075FY2025 |
| American Hosta SocietySavoy | Form 990-EZ | $120,961FY2025 |
| Lake Bluff Open Lands AssociationLake Bluff | Form 990 | $114,225FY2024 |
| Bronzeville Trail Task Force IncChicago | Form 990-EZ | $112,802FY2024 |
| Moses West FoundationHighland Park | Form 990-EZ | $111,635FY2024 |
| Campton Township Open Space FoundationSaint Charles | Form 990-EZ | $110,494FY2025 |
| Play for All Playground and GardenWheaton | Form 990-EZ | $107,784FY2025 |
| Middle Rock Conservation PartnersFranklin Grove | Form 990 | $107,287FY2025 |
| Clean Up - Give Back OrgDes Plaines | Form 990-EZ | $104,016FY2024 |
| Starved Rock Historical & Education Al FoundationUtica | Form 990-EZ | $96,519FY2025 |
| Land for Learning InstituteBuncombe | Form 990-EZ | $89,024FY2024 |
| Nature Preserve FoundationEdwardsville | Form 990-EZ | $88,641FY2025 |
| Chicago Muslims Green TeamChicago | Form 990-EZ | $86,172FY2025 |
| Protect Our ParksChicago | Form 990-EZ | $85,054FY2024 |
| North Lawndale Greening CommitteeChicago | Form 990-EZ | $80,675FY2025 |
| Yucatan Environmental FoundationRiverside | Form 990-EZ | $75,989FY2025 |
| Cress Creek Garden Club of Naperville IncNaperville | Form 990-EZ | $73,606FY2026 |
| Friends of Glen Ellyn ParksGlen Ellyn | Form 990-EZ | $73,241FY2025 |
| Evanston Environmental AssociationEvanston | Form 990 | $70,682FY2024 |
| Kenilworth Garden ClubWilmette | Form 990-EZ | $69,920FY2025 |
| Cache Bayou Outfitters IncUllin | Form 990-EZ | $67,456FY2025 |
| Lake Michigan States Section of the Air & Waste Management AssocationPalatine | Form 990-EZ | $66,605FY2025 |
| Mid Central Water Works AssociationOswego | Form 990-EZ | $66,457FY2025 |
| Mississippi River Confluence FoundationEast Alton | Form 990-EZ | $60,675FY2025 |
| Naperville Garden Club IncorporatedNaperville | Form 990-EZ | $59,550FY2025 |
| Friends of Sears Sunken GardenChicago | Form 990 | $51,359FY2025 |
| Friends of Catherine and Channel LakesChicago | Form 990-EZ | $51,195FY2025 |
| Envirosolutions InstituteChicago | Form 990-EZ | $50,000FY2024 |
| Beautify Decatur CoalitionDecatur | Form 990-N | No figure |
| Winnetka Garden ClubWinnetka | Form 990-EZ | $47,414FY2025 |
| Mississippi Bird Migration Flyway-Lake Senachwine and GooseSaint Charles | Form 990-N | No figure |
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