What is the largest zoo in the United States?

The largest zoo in the United States is the San Diego Zoo, located in San Diego, California. It spans over 100 acres and houses more than 3,500 animals representing over 650 species. The zoo is known for its open-air exhibits, including the Panda Canyon and the Elephant Odyssey, as well as its innovative approaches to animal care and conservation. The San Diego Zoo is a leader in wildlife conservation efforts and is also home to the San Diego Zoo Safari Park, a vast wildlife reserve that provides a more natural environment for its animals.