The Mid-America Air Museum is an aerospace and aircraft museum located in Liberal, Kansas, at the Liberal Mid-America Regional Airport.The Mid-American Air Museum is the largest aircraft museum in Kansas, and the fifth-largest in the United States. The museum has on display over 100 aircraft (both within the museum's primary building and on the adjacent tarmac), a gift store, and several displays of photographs and ephemera relating to the history of aviation in the region.