pueblo zoo is a zoo located in pueblo, colorado in the united states. the zoo is open year-round and is home to over 420 animals of more than 140 species. the pueblo zoological society manages the zoo, which is accredited by the association of zoos and aquariums (aza). the original core of the zoo was built 1933–1940 by the public works administration, civilian conservation corps, and works progress administration and is listed on the national register of historic places as the pueblo city park zoo.