This is a list of nature conservation organisations that primarily aim to protect species, their habitats, and ecosystems.

List of international conservation organisations

• African Wild Dog Conservancy - dedicated to conserving the African wild dog
• African Wildlife Foundation - ensuring that wildlife and wild lands thrive in modern Africa
• Bat Conservation International - working to conserve the world's bats and their habitats
• BirdLife International - a global partnership of organisations that strive to conserve birds
• Center for Biological Diversity - protecting endangered species through legal action, petitions, media and activism
• Conservation International - secure the critical benefits that nature provides to humanity
• Durrell Wildlife Conservation Trust - mission to save species from extinction
• EcoHealth Alliance - protecting the health of people, animals, and the environment from emerging infectious diseases
• Frankfurt Zoological Society (FZS)
• Fauna and Flora International - safeguard the future of southern Africa's large mammal populations
• Greenpeace - raising environmental issues to public knowledge
• International Anti-Poaching Foundation - created a structured military-like approach to conservation in Africa
• International Union for Conservation of Nature - a partnership of 1400 organisations working in the field of nature conservation
• MarAlliance - non- profit that explores the tropical seas and conducts innovative and participatory science to answer key research questions and provide information that supports the effective management and conservation of large marine wildlife and their critical habitats with the support of dependent communities.
• National Audubon Society - non-profit environmental organisation dedicated to conservation
• Ocean Conservancy - formulate ocean policy based on saving ocean.
• Planet Protectors- Preserves trees, plants trees, did the #planthundredtreeschallenge, spreads awareness about animals.
• Rainforest Action Network - preserves forests, protects the climate and upholds human rights
• Rainforest Alliance - provision of an environmental certification on forestry and agriculture
• Rainforest Foundation Fund - preserving rainforest by defending the rights of the indigenous peoples
• Rainforest Foundation UK - preserving rainforest by defending the rights of the indigenous peoples
• Rainforest Partnership - links communities in Latin American rainforests to partner communities in the United States
• Rainforest Trust - focused on the purchase of tropical lands
• Rare - helps communities adopt sustainable behaviors toward their environment
• The Nature Conservancy - largest environmental nonprofit by assets and revenue in the world.
• Wildlife Conservation Network - protecting endangered species and preserving their natural habitats.
• Wildlife Conservation Society - saves wildlife and wild places worldwide with programs in 60 countries; also manages five New York City wildlife parks including the Bronx Zoo
• World Wide Fund for Nature, also known as World Wildlife Fund - international conservation
• Zoological Society of London - devoted to the worldwide conservation of animals and their habitats

List of national or local conservation organisations

• Ancient Forest Alliance - conserving old growth forests in British Columbia, Canada
• Appalachian Trail Conservancy - Appalachian National Scenic Trail from Maine to Georgia
• Blue Mountains Conservation Society - NGO, conservation of Greater Blue Mountains area in Australia
• BirdLife Australia - Australian ornithological conservation organisation
• California Coastal Conservancy - government agency that manages coastline resources
• Central Park Conservancy - manages 843 acre Central Park under a contract with City of New York
• Comunidad Inti Wara Yassi - Bolivian non-governmental organisation
• Conservancy Association - Hong Kong's oldest non-governmental environmental organisation
• Conservancy of Southwest Florida
• Conserving Carolina
• Defenders of Wildlife - works to protect all native animals and plants throughout North America
• Department of Conservation (New Zealand)
• Ducks Unlimited
• European Wildlife
• Federal Agency for Nature Conservation - German
• Great Swamp Watershed Association
• Indian Council of Forestry Research and Education
• Izaak Walton League of America - devoted to conservation in the United States
• The Land Conservancy of British Columbia (TLC) - land trust modeled after the National Trust of Britain
• Live Ocean - New Zealand Marine conservation charity
• Miami Conservancy District - Ohio agency that manages flood control of the Great Miami River
• National Trust of Britain
• National Wildlife Federation - conservation education and advocacy for Northern American Wildlife
• Nature Conservancy of Canada - help protect Canada's most important lands, waters and wildlife
• North China Institute of Water Conservancy and Hydroelectric Power - Chinese public university
• Open Space Institute - conservation organisation and think tank in the Eastern United States
• Pheasants Forever
• Point Blue Conservation Science - advancing conservation through bird and ecosystem research
• Pro Natura - 650 nature reserves in Switzerland (250 square kilometers)
• Rails-to-Trails Conservancy (RTC) - converted 13,150 miles (21,160 km) of former rail lines to trails
• Santa Lucia Conservancy - land trust and conservation community protecting 18,000 acres in California
• Santa Monica Mountains Conservancy - dedicated to the acquisition of land for conservation in California
• Sierra Nevada Conservancy - state conservancy in California
• Southern Conservation Trust - nonprofit land trust established in 1993; operates six public nature areas throughout Fayette County in addition to an environmental education center headquartered in Fayetteville, Georgia^[1]
• Ukraine Nature Conservation Society
• Sierra Club
• The Conservation Fund - to pursue environmental preservation and economic development in the United States
• Theodore Roosevelt Conservation Partnership
• Western Pennsylvania Conservancy - 200,000 acres (800 km²)
• Whaleman Foundation - protection of cetaceans
• Wild Salmon Center - identifies and protects the best salmon ecosystems of the Pacific Rim
• Wildlife Research and Conservation Trust - undertakes field research to promote the conservation of wildlife in India
• WCS Bangladesh - Wildlife Conservation Society
• Wolf River Conservancy - protects the Wolf River in Tennessee
• Tanzania Environmental Conservation Society (TECOSO Tanzania) - advancing environmental preservation, social and economic development sustainability in Tanzania

Cave conservancies

To see organisations that are specialized land trusts managing caves and karst features in the United States, refer to Cave conservancies.