Largest Environment Charities in United States 2026

Discover the the biggest environment organizations by annual revenue in United States.

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Charities in United States

76

Nature Conservancy

United States

EIN: 530242652 · Arlington, VA · Environment

76

New Venture Fund

United States

EIN: 205806345 · Washington, DC · Environment

77

Center for Sustainable Energy

United States

EIN: 330936366 · San Diego, CA · Environment

79

Calstart Inc

United States

EIN: 954375022 · Pasadena, CA · Environment

73

World Wildlife Fund Inc

United States

EIN: 521693387 · Washington, DC · Environment

79

The Conservation Fund a Nonprofit Corporation

United States

EIN: 521388917 · Reg: 52-1388917 · Arlington, VA · Environment

84

Conservation International Foundation

United States

EIN: 521497470 · Arlington, VA · Environment

76

Windward Fund

United States

EIN: 473522162 · Washington, DC · Environment

74

Environmental Defense Fund Incorporated

United States

EIN: 116107128 · New York, NY · Environment

79

National Park Foundation

United States

EIN: 521086761 · Washington, DC · Environment

69

Natural Resources Defense Council Inc

United States

EIN: 132654926 · New York, NY · Environment

79

Iso New England Inc

United States

EIN: 043372500 · Holyoke, MA · Environment

77

Energy Trust of Oregon Inc

United States

EIN: 931313663 · Portland, OR · Environment

69

Rockefeller Foundation

United States

EIN: 131659629 · New York, NY · Environment

63

Ducks Unlimited Inc

United States

EIN: 135643799 · Memphis, TN · Environment

70

Climate Imperative Foundation

United States

EIN: 845024713 · San Francisco, CA · Environment

76

Singing River Gulfport

United States

EIN: 851538878 · Gautier, MS · Environment

79

National Audubon Society Inc

United States

EIN: 131624102 · New York, NY · Environment

66

Trust for Public Land

United States

EIN: 237222333 · San Francisco, CA · Environment

76

Vermont Energy Investment Corp

United States

EIN: 030304418 · Winooski, VT · Environment

72

Wetlands America Trust Inc

United States

EIN: 363330394 · Memphis, TN · Environment

73

Rocky Mountain Institute

United States

EIN: 742244146 · Boulder, CO · Environment

64

Earthjustice

United States

EIN: 941730465 · San Francisco, CA · Environment

86

National Arbor Day Foundation

United States

EIN: 237169265 · Lincoln, NE · Environment

79

New York Botanical Garden

United States

EIN: 131693134 · Bronx, NY · Environment

76

Sierra Club Foundation

United States

EIN: 946069890 · Oakland, CA · Environment

71

City of Oaks Foundation Inc

United States

EIN: 274467111 · Raleigh, NC · Environment

86

Thanksgiving Point Institute Inc

United States

EIN: 841416158 · Lehi, UT · Environment

76

Social and Environmental Entrepreneurs Inc

United States

EIN: 954116679 · Calabasas, CA · Environment

76

Urban Land Institute

United States

EIN: 530159845 · Washington, DC · Environment

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Environmental Charities

Environmental charities protect natural resources, combat climate change, preserve biodiversity, and promote sustainable practices. These organizations range from local conservation groups to global advocacy networks. Their work includes wildlife protection, ocean conservation, reforestation, clean energy advocacy, and environmental education.

GiveRadar indexes environmental nonprofits globally with financial data and trust scores. Search and filter to discover environmental organizations by country, size, and impact area.