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Illinois · NTEE C

Environment Nonprofits in Illinois

Givalgo Discover indexes 50 active environment nonprofits headquartered in Illinois. The list below is sorted by reported revenue on the most recent Form 990 indexed for each organisation.

Top 50 by reported revenue

From the most recent Form 990 indexed for each organisation. Click an org for full diligence detail.

#OrganisationRevenue
1CHICAGO HORTICULTURAL SOCIETY
EIN 36-2225482
$68.1M
2ELEVATE ENERGY
EIN 36-4443093
$60.9M
3MORTON ARBORETUM
EIN 36-1505770
$57.8M
4WATER QUALITY ASSOCIATION
EIN 36-2784319
$15.7M
5ENVIRONMENTAL LAW & POLICY CENTER OF THE MIDWEST
EIN 36-3866530
$10.9M
6LAKE FOREST OPEN LANDS ASSOCIATION
EIN 36-6162709
$8.9M
7CONSERVATION FOUNDATION
EIN 23-7221206
$7.5M
8CLIMATE VAULT INC
EIN 85-4211960
$6.0M
9CURRENT INNOVATION NFP
EIN 81-2620127
$5.9M
10CENTER FOR NEIGHBORHOOD TECHNOLOGY
EIN 36-2967283
$4.8M
11MIDWEST ENERGY EFFICIENCY ALLIANCE
EIN 36-4352022
$4.7M
12ROCKFORD PARK DISTRICT FOUNDATION
EIN 36-3083192
$4.2M
13GARFIELD PARK CONSERVATORY ALLIANCE
EIN 36-4200490
$3.9M
14ILLINOIS AUDUBON SOCIETY
EIN 36-6065870
$3.8M
15COUNCIL OF GREAT LAKES GOVERNORS INC
EIN 41-1427529
$3.8M
16BRUSHWOOD CENTER AT RYERSON WOODS
EIN 36-3715155
$3.7M
17CUB CONSUMER EDUCATION AND RESEARCHFUND
EIN 20-4904719
$3.7M
18BOND MADISON WATER COMPANY
EIN 37-1329067
$3.7M
19EVERGREEN CLIMATE INNOVATIONS
EIN 27-2378677
$3.7M
20THE WETLANDS INITIATIVE
EIN 36-3942451
$3.5M
21KINDNESS CAMPAIGN
EIN 82-1694708
$3.4M
22PASSIVE HOUSE INSTITUTE US INC
EIN 30-0211695
$3.4M
23PRESERVATION FOUNDATION OF THE LAKECOUNTY FOREST PRESERVES
EIN 26-0285660
$3.4M
24FRIENDS OF THE FOREST PRESERVES
EIN 36-4519273
$3.1M
25ILLINOIS ENVIRONMENTAL COUNCIL EDUCATION FUND
EIN 51-0211835
$3.0M
26NATURAL LAND INSTITUTE
EIN 36-2478025
$2.9M
27JO DAVIESS CONSERVATION FOUNDATION INC
EIN 36-3913497
$2.9M
28GREEN ERA EDUCATIONAL NFP
EIN 46-2580661
$2.7M
29ANDERSON GARDENS
EIN 36-4201695
$2.7M
30LIVING LANDS & WATERS
EIN 36-4244353
$2.5M
31HEALTHY SCHOOLS CAMPAIGN
EIN 36-4308068
$2.4M
32THE DUPAGE RIVER SALT CREEK WORK GROUP
EIN 56-2543795
$2.3M
33YOUTH CONSERVATION CORPS
EIN 36-3993578
$2.1M
34HEARTLANDS CONSERVANCY
EIN 37-1273869
$2.1M
35BLACK OAKS CENTER FOR SUSTAINABLE RENEWABLE LIVING NFP
EIN 20-4280294
$2.1M
36ILLINOIS PARK AND RECREATION ASSOCIATION
EIN 30-0098388
$2.0M
37QUAD CITY BOTANICAL CENTER FOUNDATION
EIN 36-3496537
$1.9M
38SOUTHEAST ENVIRONMENTAL TASK FORCE
EIN 36-3977631
$1.7M
39PRAIRIE RIVERS NETWORK
EIN 37-6085905
$1.6M
40FOOD FOR CLIMATE LEAGUE INC
EIN 84-2916598
$1.6M
41ALLIANCE FOR WATER EFFICIENCY NFP
EIN 30-0416781
$1.5M
42SAVING TOMORROWS AGRICULTURE RESOURCES
EIN 93-1858839
$1.5M
43ABRAHAM LINCOLN MEMORIAL GARDEN FOUNDATION
EIN 37-0811051
$1.2M
44THE GAIA-MOVEMENT LIVING EARTH GREEN WORLD ACTION USA INC
EIN 36-4284332
$1.2M
45ILLINOIS CONSERVATION FOUNDATION
EIN 37-1340071
$1.2M
46U S GREEN BUILDING COUNCIL-ILLINOIS CHAPTER
EIN 75-3098915
$1.1M
47A M HUNTINGTON TRUST FBO BROOKGREEN GARDENS PV 3584
EIN 13-6035523
$1.1M
48CITIZENS FOR CONSERVATION INC
EIN 23-7106675
$1.1M
49CLEAN ENERGY JOBS AND JUSTICE FUND
EIN 93-3203418
$1.0M
50FRIENDS OF NACHUSA GRASSLANDS
EIN 26-3303031
$1.0M

Frequently asked questions about environment nonprofits in Illinois

Answers compiled from the IRS Form 990, BMF, Pub 78, and Auto-Revocation List.

How many environment nonprofits operate in Illinois?
Every IRS-registered environment nonprofit in Illinois appears in the Givalgo Discover index. The top 50 by reported revenue are listed on this page; the full set is searchable on discover.givalgo.ai.
What's the largest environment nonprofit in Illinois?
The single largest environment nonprofit in Illinois by reported total revenue is shown at the top of the list on this page, sourced from each organisation's most recent IRS Form 990 filing.
How do I vet a environment nonprofit in Illinois before donating?
Use Givalgo Discover's free profile for the organisation: it cross-references the IRS Auto-Revocation List, IRS Publication 78, and the IRS Business Master File, and exposes the latest Form 990 financials and governance signals on a single page.
Are donations to Illinois environment nonprofits tax-deductible?
Federal deductibility is determined by IRS Publication 78 status, not state location. Donations to a Pub 78-listed environment nonprofit in Illinois are tax-deductible at the federal level; Illinois state tax treatment may differ.
Where do environment nonprofits in Illinois file their Form 990?
All US tax-exempt organisations file Form 990 with the IRS at the federal level — there is no state-specific filing for the federal exemption itself. Illinois state charity registration is a separate state-level requirement.