• Environmental organizations based in the United States by state‎ (33 C)

.

• Environmental organizations based in Washington, D.C.‎ (1 C, 54 P)
• Environmental organizations based in Puerto Rico‎ (1 C, 2 P)

A

• Anti-nuclear organizations based in the United States‎ (21 P)
• Aquaria in the United States‎ (2 C, 7 P)
• Audubon movement‎ (4 C, 28 P, 1 F)

B

• Botanical gardens in the United States‎ (4 C, 2 P)

C

• Climate change organizations based in the United States‎ (103 P)
• Conservation and environmental foundations in the United States‎ (1 C, 41 P)

E

• Earth Liberation Front‎ (24 P)
• Environmental agencies in the United States‎ (8 C, 20 P)

G

• Green political parties in the United States‎ (2 C, 7 P)

L

• Land trusts in the United States‎ (11 C, 36 P)

N

• National Environmental Satellite, Data, and Information Service‎ (1 C, 8 P)
• Natural resources agencies in the United States‎ (2 C, 41 P)
• Nature centers in the United States‎ (3 C, 1 P)
• Nature conservation organizations based in the United States‎ (10 C, 258 P)

O

• Ornithological organizations in the United States‎ (4 C, 60 P, 2 F)

R

• Renewable energy organizations based in the United States‎ (45 P)
• Resources for the Future‎ (9 P)

T

• The Nature Conservancy‎ (1 C, 12 P)

W

• Water organizations in the United States‎ (3 C, 75 P)

Z

• Zoos in the United States‎ (4 C, 6 P)

• List of environmental and conservation organizations in the United States

*

• Environmental community organizations

A

• Acid Rain Program
• Adirondack Mountain Club
• African American Environmentalist Association
• Alliance for Climate Education
• American Acclimatization Society
• American Bison Society
• American Cetacean Society
• American Chestnut Cooperators' Foundation
• The American Chestnut Foundation
• American Forests
• American Shore and Beach Preservation Association
• American Society of Reclamation Sciences
• Anecdata.org
• Appalachian Trail Conservancy
• Arbor Day Foundation
• Argos Izaak Walton League Historic District
• As You Sow
• Association of American Weather Observers
• Association of Environmental and Resource Economists
• Audubon Colorado Council
• Audubon
• Avoided Deforestation Partners

B

• Beyond Coal
• Bioneers
• Black Birders Week
• Brunswick-Topsham Land Trust

C

• Carbon180
• Center for Plant Conservation
• Chebeague & Cumberland Land Trust
• Chesapeake Bay Program
• Church of Euthanasia
• Circle of Life Foundation
• Citizens Campaign for the Environment
• Clean Air Conservancy
• Clean Water Action
• Climate Counts
• Climate Hawks Vote
• Climate Positive Development Program
• Coalition for Environmentally Responsible Economies
• Coastal and Estuarine Research Federation
• Community Against Pollution
• Continental Divide Trail Coalition
• Corporate Accountability

D

• Deep Green Resistance
• The Detroit Project
• Disney's Friends for Change

E

• Earth First!
• Earth Liberation Front
• EcoHealth Alliance
• Ecoplanet Bamboo Group
• EcoTeach
• Eden Reforestation Projects
• Environmental Action
• Environmental Design Research Association
• Environmental groups and resources serving K–12 schools
• Environmental Law Alliance Worldwide
• Environmental Law and Policy Center
• Environmental Life Force
• ETC Group (eco-justice)

F

• Family Nature Summit
• Finding Species
• Food Democracy Now!
• Forest History Society
• The FracTracker Alliance
• Friends of the Boundary Waters Wilderness
• Friends of the Earth (US)

G

• Global Environmental Institute
• Global Footprint Network
• Global Water Policy Project
• GLOBIO
• Golden Gate Bird Alliance
• Got Mercury?
• Green Light New Orleans
• The Green Project

H

• Herb Society of America
• Highway Action Coalition
• Honor the Earth

I

• Idaho Conservation League
• Independent Party of Delaware
• Indigenous Environmental Network
• Institute for Energy and Environmental Research
• Institute for Environmental Diplomacy and Security
• Institute for Marine Mammal Studies
• Institute of Environmental Sciences and Technology
• International Council on Clean Transportation
• International Rivers
• Investor Network on Climate Risk
• Ioby
• IWLA Diana Chapter
• Izaak Walton League

L

• The Land Institute
• Leave No Trace
• Louisiana Bucket Brigade

M

• Madagascar Fauna and Flora Group
• Maderas Rainforest Conservancy
• Maine Coast Heritage Trust
• Maine Island Trail Association
• Maine Land Trust Network
• Missouri Prairie Foundation
• Moms Clean Air Force
• Mountain Justice (organization)

N

• National Council for Science and the Environment
• National Environmental Justice Advisory Council
• National Fish Habitat Partnership
• Natural Capital Project
• Natural Resources Council of Maine
• Natural Resources Defense Council
• List of nature centers in the United States
• Negative Population Growth
• New Dream
• New England Forestry Foundation
• New Hampshire Wildlife Federation
• Noise Free America
• North American Invasive Species Network
• Northwest Energy Efficiency Alliance
• Northwest Service Academy
• Noya Fields Family Funds

O

• Ocean Arks International
• Ocean Champions
• The Ocean Project
• Office of Response and Restoration
• Open Space Institute
• OpEPA

P

• Pacific Crest Trail Association
• Partnership for the Delaware Estuary
• People's Climate Movement
• Personal Responsibility in a Desirable Environment
• Pheasants Forever
• Plastic Pollution Coalition
• Public Employees for Environmental Responsibility
• Public Lab

R

• Restore America's Estuaries
• Reverb (non-profit)
• Rewilding Institute
• Rocky Mountain Elk Foundation
• Royal River Conservation Trust
• Rural Action

S

• The Shad Foundation
• Sherburne Complex Wildlife Management Area
• Sierra Nevada Alliance
• Skytruth
• Smokies Life
• Snake River Alliance
• Soil and Water Conservation Society
• Southeast Propane Autogas Development Program
• Southeastern Cave Conservancy Inc.
• Stand.earth
• Student Conservation Association
• Student Environmental Action Coalition
• Superfund Research Program

T

• Tar Sands Blockade
• Torreya Guardians
• Tri-State Bird Rescue and Research

U

• U.S. Climate Action Partnership
• US Institute for Environmental Conflict Resolution

V

• Voluntary Human Extinction Movement

W

• WAAKE-UP!
• WildEarth Guardians
• Wildlife Alliance
• World Center for Birds of Prey
• World Surfing Reserves