London Zoo, previously known as ZSL London Zoo or London Zoological Gardens and sometimes called Regent's Park Zoo, is the world's oldest scientific zoo. It was opened in London on 27 April 1828, and was originally intended to be used as a collection for scientific study.

The ZSL London Zoo is a world-class scientific and conservation-focused zoological garden, distinguished as the oldest scientific zoo in the world (founded in 1828). Located on the northern edge of Regent's Park, it is a "living museum" of natural history that transformed from a private collection for study into a public attraction in 1847. In 2026, it serves as a major hub for global conservation efforts managed by the Zoological Society of London. The zoo is categorized by immersive "biomes" rather than simple cages, such as the Land of the Lions, which recreates an Indian village, and Gorilla Kingdom. It is famous for its "pioneering" structures, having opened the world's first reptile house, public aquarium, and insect house. As an attraction, it offers an "educational-leisure" experience where visitors can participate in "Keeper for a Day" programs and "Friendly Spider" workshops. While it is a family-friendly tourist destination, its primary identity remains rooted in animal welfare, scientific research, and the preservation of endangered species from across the globe.