Knightstown is a town in Wayne Township, Henry County, Indiana, along the Big Blue River. The population was 2,182 at the 2010 census. Knightstown is famous for the 1986 movie Hoosiers. The Hoosier Gym was used in the filming of the movie. 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.