Chester Zoo is a zoological garden at Upton-by-Chester, in Cheshire, England. It was opened in 1931 by George Mottershead and his family, who used as a basis some animals reported to have come from an earlier zoo in Shavington. It is one of the UK's largest zoos at 111 acres. The zoo has a total land holding of approximately 400 acres.
Chester Zoo is currently operated by the North of England Zoological Society, a registered charity founded in 1934. The zoo receives no government funding. It is the most-visited wildlife attraction in Britain with more than 1.3 million visitors in 2007. In the same year Forbes described it as one of the best fifteen zoos in the world, above Beijing Zoo and San Diego Zoo.