Missouri had 48 county and 14 regional library systems in 2000, when the combined book stock of all public libraries in the state was 22,697,000, and their combined circulation 38,458,000. The Missouri State Library, in Jefferson City, is the center of the state's interlibrary loan network. It also serves as the only public library for the population who live in areas without public libraries; it has 79,761 books. The largest public library systems, those of Kansas City and St. Louis County, had 1,204,992 and 2,777,056 volumes, respectively; the public library system of the city of St. Louis had 2,505,182 in 15 branches. The University of Missouri-Columbia has the leading academic library, with 2,850,747 volumes in 1998. The State Historical Society of Missouri Library in Columbia contains 453,000 volumes. The federally-administered Harry S. Truman Library and Museum is at Independence. The total income of public libraries in Missouri came to $146,528,000 in 2000; including $2,344,448 in federal grants and $3,223,616 in state grants.
Missouri has well over 162 museums and historic sites. The William Rockhill Nelson Gallery/Atkins Museum of Fine Arts in Kansas City and the St. Louis Art Museum each house distinguished general collections, while the Springfield Art Museum specializes in American sculpture, paintings, and relics of the westward movement. The Mark Twain Home and Museum in Hannibal has a collection of manuscripts and other memorabilia. Also notable are the Museum of Art and Archaeology, Columbia; the Kansas City Museum of History and Science; the Pony Express Stables Museum, St. Joseph; and the Jefferson National Expansion Memorial, Missouri Botanical Garden, St. Louis Center Museum of Science and Natural History and McDonnell Planetarium, National Museum of Transport, and a zoo, all in St. Louis. Kansas City, Springfield, and Eldon also have zoos.