List of environmental and conservation organizations in the United States

Environmental and conservation organizations in the United States have been formed to help protect the environment, habitats, flora, and fauna on federally owned land, on private land, within coastal limits, in-state conservation areas, in-state parks and in locally governed municipalities. In addition, some organizations utilize the court system in states and at the federal level to enforce environmental and conservation regulations and laws. Most organizations operate as nonprofits. The revenue of these organizations is used to achieve their goals rather than distributing them as profit or dividends.

In the Environmental history of the United States there have been a multitude of environmental organizations--over 160 private groups are listed below. However the "Group of Ten" (or "Big Green") have been preeminent since the late 20th century: Sierra Club, Audubon, National Wildlife Federation, Environmental Defense Fund, Friends of the Earth, Izaak Walton League, The Wilderness Society, National Parks Conservation Association, Natural Resources Defense Council and Earthjustice.

After a nonprofit environmental and conservation organization has been established at the state level, it typically applies for tax exempt status with U.S. federal income tax. Failure to maintain operations in conformity to the laws may result in an organization losing its tax exempt status. Individual states and localities offer nonprofits exemptions from other taxes such as sales tax or property tax. An environmental and conservation organization that is tax exempt is required to file annual financial reports (IRS Form 990). These tax forms are required to be made available to the public.

Government agencies

 * United States Department of the Interior
 * Environmental Protection Agency
 * Fish and Wildlife Service
 * National Park Service

Native American Nations

 * Akwesasne Task Force on the Environment
 * Eyak Preservation Council
 * Indigenous Environmental Network
 * Inter-Tribal Environmental Council
 * InterTribal Sinkyone Wilderness Council

Alphabetical listing

 * 350 Bay Area
 * 5 Gyres
 * Abalone Alliance (historic)
 * Adirondack Mountain Club
 * African American Environmentalist Association
 * African Wild Dog Conservancy
 * Alaska Conservation Foundation
 * Allegheny Land Trust
 * Alliance for Climate Protection — see Climate Reality Project, The
 * Alliance to Save Energy
 * American Bird Conservancy
 * American Farmland Trust
 * American Forests
 * American Prairie Foundation
 * Appalachian Voices
 * Arlington Coalition on Transportation (ACT)
 * Audubon movement
 * Aytzim: Ecological Judaism
 * BARK
 * Ballona Wetlands
 * Big Green Bus, The
 * Bonneville Environmental Foundation
 * Boone and Crockett Club
 * Builders for the Bay
 * Brunswick-Topsham Land Trust
 * California Trout (CalTrout)
 * Californians Against Waste
 * Californians for Population Stabilization
 * Carbon180
 * Center for Biological Diversity
 * Center for Environmental Philosophy
 * Center for Food Safety
 * Center for International Environmental Law
 * Ceres
 * Chebeague & Cumberland Land Trust
 * Chesapeake Bay Foundation
 * Citizens Campaign for the Environment
 * Citizens Climate Lobby
 * Clean Water Action
 * The Climate Reality Project
 * The Climate Mobilization
 * ConservAmerica
 * The Conservation Fund
 * Conservation International
 * Conservation Law Foundation
 * Conserving Carolina
 * Cool Effect
 * Defenders of Wildlife
 * Ducks Unlimited
 * Earth Day
 * Earth First!
 * Earth Island Institute
 * Earthjustice
 * Earth Liberation Army (ELA)
 * Earth Liberation Front (ELF)
 * Earth Policy Institute
 * Earth's Birthday Project
 * Ecotrust
 * Endangered Planet Foundation
 * Engineers for a Sustainable World
 * Environment America
 * Environment California
 * Environmental and Energy Study Institute (EESI)
 * Environmental Defense Fund
 * Environmental Design Research Association (EDRA)
 * Environmental Integrity Project (EIP)
 * Environmental Law Institute
 * Environmental Life Force (ELF)
 * Environmental Working Group
 * Franciscan Action Network
 * GivePower
 * Global Water Policy Project
 * Golden State Salmon Association
 * Great March for Climate Action
 * Greenguard Environmental Institute
 * Greening of Detroit
 * Greenpeace USA
 * Heal the Bay
 * Honor the Earth
 * Hudson River Sloop Clearwater
 * Institute for Energy and Environmental Research (IEER)
 * Institute of Environmental Sciences and Technology (IEST)
 * International Council on Nanotechnology (ICON)
 * Island Conservation
 * Izaak Walton League
 * Keep America Beautiful
 * League of Conservation Voters
 * Maine Island Trail Association
 * Marine Mammal Center, The
 * McHenry County Conservation District (MCCD)
 * Mission: Wolf
 * National Audubon Society
 * National CleanUp Day
 * National Council for Science and the Environment (NCSE)
 * National Geographic Society
 * National Parks Conservation Association (NPCA)
 * National Wildlife Federation
 * National Wildlife Refuge Association
 * Natural Resources Council of Maine
 * Natural Resources Defense Council
 * Nature Conservancy, The
 * NatureServe
 * Negative Population Growth
 * New Dream
 * New York–New Jersey Trail Conference
 * Ocean Alliance
 * Ocean Conservancy
 * Ohio Citizen Action
 * One Planet One Future
 * One World One Ocean (California)
 * Oregon Wild
 * Pacific Environment
 * People's Climate Movement
 * The Peregrine Fund
 * Population Action International
 * Population Connection
 * Population Council
 * Population Media Center
 * Population Reference Bureau
 * Power Shift Network
 * Public Employees for Environmental Responsibility (PEER)
 * Prairie Rivers Network
 * Rainforest Action Network
 * Resources for the Future (RFF)
 * Rising Tide North America
 * Riverkeeper
 * Rocky Mountain Elk Foundation
 * Royal River Conservation Trust
 * RuckusRoots
 * Sand County Foundation
 * Santa Lucia Conservancy
 * Save the Redwoods League
 * Scenic Hudson
 * School for Field Studies, The
 * Sea Shepherd Conservation Society
 * Sierra Club
 * Sierra Student Coalition
 * Silicon Valley Toxics Coalition
 * Society for the Protection of Underground Networks (SPUN)
 * Southeast Alaska Conservation Council (SEACC)
 * Southern Environmental Law Center
 * Southern Utah Wilderness Alliance
 * Stand.earth
 * Student Conservation Association
 * Student Environmental Action Coalition (SEAC)
 * Surfrider Foundation
 * Texas Campaign for the Environment
 * Torreya Guardians
 * TreePeople
 * Trout Unlimited
 * The Earth Organization
 * The Trust for Public Land
 * Union of Concerned Scientists
 * United Plant Savers
 * Urban Bird Foundation
 * Waterkeeper Alliance
 * West Harlem Environmental Action (WEACT)
 * WILD Foundation
 * Wild Salmon Center
 * Wilderness Society, The
 * WildEarth Guardians
 * Wild Farm Alliance
 * Wildlife Conservation Network
 * The Wildlife Society
 * Wild Montana
 * Whippany River Watershed Action Committee
 * Worldwatch Institute
 * World Wildlife Fund (WWF)
 * Wyoming Outdoor Council