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Environment nonprofits

The IRS classifies 28,924 tax-exempt organizations under Environment, rank 13 of 25 major groups. 11,915 of them have a Form 990 on record.

Religion-Related · 206,183Social Science · 1,852

Environment is 13 of 25 by tax-exempt organizations, at 28,924. Highest on the left.

The 25 figures behind this strip
Every jurisdiction by tax-exempt organizations, highest first, with Environment marked
RankNameTax-exempt organizations
1Religion-Related206,183
2Education188,414
3Human Services156,654
4Arts, Culture and Humanities119,872
5Recreation and Sports115,112
6Philanthropy, Voluntarism and Grantmaking Foundations105,658
7Community Improvement and Capacity Building73,203
8Youth Development59,057
9Health Care46,474
10Animal-Related42,006
11Public and Societal Benefit35,776
12Housing and Shelter31,412
13Environment28,924
14Mental Health and Crisis Intervention27,977
15Public Safety, Disaster Preparedness and Relief22,751
16International, Foreign Affairs and National Security21,464
17Food, Agriculture and Nutrition20,796
18Mutual and Membership Benefit17,810
19Employment15,992
20Crime and Legal-Related15,315
21Voluntary Health Associations and Medical Disciplines14,205
22Civil Rights, Social Action and Advocacy11,489
23Science and Technology6,929
24Medical Research6,346
25Social Science1,852

At a glance

28,924
Organizations classified here
By the code the IRS assigned at registration.
27,752
Recognized under 501(c)(3)
The charitable subsection.
11,915
With a Form 990 on record
The only organizations with financial figures here.
$24.8 billion
Revenue reported
$24,785,349,994
Summed across filings, each for a different year.
$662.4 million
Largest single organization
$662,364,100
Revenue on its most recent filing.
2.1%
Share of all classified organizations
Of the organizations that carry a classification code at all.

Taken from the IRS on October 14, 2026. 576,240 organizations carry no code and appear in no category.

Largest by revenue

2 more columns on a wider screen

Organizations classified under Environment, by revenue on their most recent Form 990
RankOrganizationRevenue
1New Venture Fund$662.4 million
2Environmental Defense Fund Incorporated$443.3 million
3Ducks Unlimited Inc$380.3 million
4World Wildlife Fund Inc$366.7 million
5Center for Sustainable Energy$335.6 million
6The Conservation Fund a Nonprofit Corporation$329.4 million
7Conservation International Foundation$308.7 million
8Windward Fund$308.2 million
9Trust for Public Land$301.2 million
10Sixteen Thirty Fund$282.2 million
11Climate Imperative Foundation$271.7 million
12Iso New England Inc$264.6 million
13Energy Trust of Oregon Inc$251.2 million
14Natural Resources Defense Council Inc$248.9 million
15National Audubon Society Inc$197.3 million

Other categories

What this classification is

  • The IRS assigns a code when it recognizes an organization. It describes what an organization said it would do at registration, which may not be what it does now.
  • 576,240 of the 1,975,975 recognized organizations carry no code at all. They are in none of these categories and are counted on the hub instead.
  • The names here are the IRS’s own. Other publishers use a revised taxonomy with different names for several groups, so a figure here will not always line up with one of theirs carrying a similar label.

Full method at methodology.

Sources

Compiled automatically from Exempt Organizations Business Master File and Form 990 series e-file data by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved