GivalgoGivalgo Discover

Looking for a specific nonprofit?

Search 1.9 million IRS-registered organisations by name, EIN, sector, or location.

Start a search

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
$12.1M
6LAKE FOREST OPEN LANDS ASSOCIATION
EIN 36-6162709
$8.9M
7CONSERVATION FOUNDATION
EIN 23-7221206
$7.5M
8MIDWEST ENERGY EFFICIENCY ALLIANCE
EIN 36-4352022
$6.1M
9CLIMATE VAULT INC
EIN 85-4211960
$6.0M
10CURRENT INNOVATION NFP
EIN 81-2620127
$5.9M
11CENTER FOR NEIGHBORHOOD TECHNOLOGY
EIN 36-2967283
$4.8M
12NATURAL LAND INSTITUTE
EIN 36-2478025
$4.2M
13ROCKFORD PARK DISTRICT FOUNDATION
EIN 36-3083192
$4.2M
14EVANSTON REBUILDING WAREHOUSE
EIN 27-3797852
$4.0M
15GARFIELD PARK CONSERVATORY ALLIANCE
EIN 36-4200490
$3.9M
16ILLINOIS AUDUBON SOCIETY
EIN 36-6065870
$3.8M
17COUNCIL OF GREAT LAKES GOVERNORS INC
EIN 41-1427529
$3.8M
18BRUSHWOOD CENTER AT RYERSON WOODS
EIN 36-3715155
$3.7M
19CUB CONSUMER EDUCATION AND RESEARCHFUND
EIN 20-4904719
$3.7M
20BOND MADISON WATER COMPANY
EIN 37-1329067
$3.7M
21EVERGREEN CLIMATE INNOVATIONS
EIN 27-2378677
$3.7M
22THE WETLANDS INITIATIVE
EIN 36-3942451
$3.5M
23KINDNESS CAMPAIGN
EIN 82-1694708
$3.4M
24PASSIVE HOUSE INSTITUTE US INC
EIN 30-0211695
$3.4M
25PRESERVATION FOUNDATION OF THE LAKECOUNTY FOREST PRESERVES
EIN 26-0285660
$3.4M
26FRIENDS OF THE FOREST PRESERVES
EIN 36-4519273
$3.1M
27ILLINOIS ENVIRONMENTAL COUNCIL EDUCATION FUND
EIN 51-0211835
$3.0M
28JO DAVIESS CONSERVATION FOUNDATION INC
EIN 36-3913497
$2.9M
29LIVING LANDS & WATERS
EIN 36-4244353
$2.8M
30HEARTLANDS CONSERVANCY
EIN 37-1273869
$2.8M
31GREEN ERA EDUCATIONAL NFP
EIN 46-2580661
$2.7M
32ANDERSON GARDENS
EIN 36-4201695
$2.7M
33HEALTHY SCHOOLS CAMPAIGN
EIN 36-4308068
$2.4M
34THE DUPAGE RIVER SALT CREEK WORK GROUP
EIN 56-2543795
$2.3M
35YOUTH CONSERVATION CORPS
EIN 36-3993578
$2.1M
36BLACK OAKS CENTER FOR SUSTAINABLE RENEWABLE LIVING NFP
EIN 20-4280294
$2.1M
37ILLINOIS PARK AND RECREATION ASSOCIATION
EIN 30-0098388
$2.0M
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
42THORIUM ENERGY ALLIANCE
EIN 45-1960267
$1.4M
43ABRAHAM LINCOLN MEMORIAL GARDEN FOUNDATION
EIN 37-0811051
$1.2M
44ILLINOIS CONSERVATION FOUNDATION
EIN 37-1340071
$1.2M
45U S GREEN BUILDING COUNCIL-ILLINOIS CHAPTER
EIN 75-3098915
$1.1M
46THE GAIA-MOVEMENT LIVING EARTH GREEN WORLD ACTION USA INC
EIN 36-4284332
$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.