Knightstown is a town in Wayne Township, Henry County, Indiana, adjacent to Rush County, along the Big Blue River. The population was 2,182 at the 2010 census. It is approximately thirty-two miles east of Indianapolis. Knightstown is famous for the 1986 film Hoosiers. The Hoosier Gym was used in the filming of the film. Knightstown hosts two annual festivals: Jubilee Days held in early-mid June and The Hoosier Fall Festival held in September. Knightstown also hosts an annual car show and a music series on the town square. The Hoosier Gym also hosts Indiana's best high school basketball players in the annual Hoosier Classic.
Knightstown was founded and platted by Waitsell M. Cary in 1827. It was named for Jonathan Knight, an engineer on the National Road and U.S. Congressman from Pennsylvania.