World Conservation Union (IUCN)
- Country: Switzerland
- Type: Organization
- Website: www.iucn.org
- Update: 05-02
The International Union for the Conservation of Nature (IUCN) is a global environmental organization founded in 1948 and headquartered in Gland, Switzerland. It focuses on assessing and conserving nature, seeking systematic solutions to the world's most pressing environmental and development challenges, and publishing the famous IUCN Red List of Threatened Species. It publishes the famous IUCN Red List of Threatened Species.