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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
$15.9M
5ENVIRONMENTAL LAW & POLICY CENTER OF THE MIDWEST
EIN 36-3866530
$12.1M
6URBAN SUSTAINABILITY DIRECTORS NETWORK
EIN 82-5015863
$11.3M
7LAKE FOREST OPEN LANDS ASSOCIATION
EIN 36-6162709
$9.4M
8CONSERVATION FOUNDATION
EIN 23-7221206
$7.5M
9MIDWEST ENERGY EFFICIENCY ALLIANCE
EIN 36-4352022
$6.1M
10CLIMATE VAULT INC
EIN 85-4211960
$6.0M
11CURRENT INNOVATION NFP
EIN 81-2620127
$5.9M
12JO DAVIESS CONSERVATION FOUNDATION INC
EIN 36-3913497
$5.4M
13CENTER FOR NEIGHBORHOOD TECHNOLOGY
EIN 36-2967283
$5.3M
14PRESERVATION FOUNDATION OF THE LAKECOUNTY FOREST PRESERVES
EIN 26-0285660
$4.4M
15NATURAL LAND INSTITUTE
EIN 36-2478025
$4.2M
16CITIZENS FOR CONSERVATION INC
EIN 23-7106675
$4.0M
17EVANSTON REBUILDING WAREHOUSE
EIN 27-3797852
$4.0M
18GARFIELD PARK CONSERVATORY ALLIANCE
EIN 36-4200490
$3.9M
19BOND MADISON WATER COMPANY
EIN 37-1329067
$3.9M
20ILLINOIS AUDUBON SOCIETY
EIN 36-6065870
$3.8M
21FRIENDS OF THE FOREST PRESERVES
EIN 36-4519273
$3.8M
22COUNCIL OF GREAT LAKES GOVERNORS INC
EIN 41-1427529
$3.8M
23CUB CONSUMER EDUCATION AND RESEARCHFUND
EIN 20-4904719
$3.7M
24EVERGREEN CLIMATE INNOVATIONS
EIN 27-2378677
$3.7M
25THE WETLANDS INITIATIVE
EIN 36-3942451
$3.5M
26KINDNESS CAMPAIGN
EIN 82-1694708
$3.4M
27PASSIVE HOUSE INSTITUTE US INC
EIN 30-0211695
$3.4M
28ROCKFORD PARK DISTRICT FOUNDATION
EIN 36-3083192
$3.4M
29ANDERSON GARDENS
EIN 36-4201695
$3.2M
30ILLINOIS ENVIRONMENTAL COUNCIL EDUCATION FUND
EIN 51-0211835
$3.0M
31BRUSHWOOD CENTER AT RYERSON WOODS
EIN 36-3715155
$3.0M
32LIVING LANDS & WATERS
EIN 36-4244353
$2.8M
33HEARTLANDS CONSERVANCY
EIN 37-1273869
$2.8M
34PRAIRIE RIVERS NETWORK
EIN 37-6085905
$2.8M
35GREEN ERA EDUCATIONAL NFP
EIN 46-2580661
$2.7M
36HEALTHY SCHOOLS CAMPAIGN
EIN 36-4308068
$2.4M
37THE DUPAGE RIVER SALT CREEK WORK GROUP
EIN 56-2543795
$2.3M
38YOUTH CONSERVATION CORPS
EIN 36-3993578
$2.1M
39BLACK OAKS CENTER FOR SUSTAINABLE RENEWABLE LIVING NFP
EIN 20-4280294
$2.1M
40ILLINOIS PARK AND RECREATION ASSOCIATION
EIN 30-0098388
$2.0M
41GRAND PRAIRIE FRIENDS
EIN 37-1159051
$1.8M
42SOUTHEAST ENVIRONMENTAL TASK FORCE
EIN 36-3977631
$1.7M
43ALLIANCE FOR WATER EFFICIENCY NFP
EIN 30-0416781
$1.7M
44FOOD FOR CLIMATE LEAGUE INC
EIN 84-2916598
$1.6M
45U S GREEN BUILDING COUNCIL-ILLINOIS CHAPTER
EIN 75-3098915
$1.5M
46THORIUM ENERGY ALLIANCE
EIN 45-1960267
$1.4M
47ABRAHAM LINCOLN MEMORIAL GARDEN FOUNDATION
EIN 37-0811051
$1.2M
48ILLINOIS CONSERVATION FOUNDATION
EIN 37-1340071
$1.2M
49HUISINGH FAMILY FOUNDATION
EIN 93-4459811
$1.2M
50CLEAN ENERGY JOBS AND JUSTICE FUND
EIN 93-3203418
$1.1M

Featured organizations

A representative cross-section beyond the revenue ranking, from national institutions to small community groups and private foundations, chosen for complete, recent IRS filings.

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.