Oklahoma City Zoological Park, zoo founded in 1904 in Oklahoma City, Oklahoma, U.S., which maintains one of the finest collections of antelopes and other horned ungulates in North America. The 110-acre (45-hectare) zoo has more than 2,000 specimens of some 500 species, among which are a herd of rare markhor (Capra falconeri), and breeding colonies of golden lion marmosets (Leontopithecus rosalia).