The Butler County Courthouse is a public courthouse constructed in 1909, in El Dorado, Kansas. It was designed by George P. Washburn & Sons to serve as the main county courthouse for Butler County. The Romanesque Revival courthouse was typical of Washburn's courthouse designs; of the eleven surviving courthouses designed by the architect, nine are Romanesque. The red brick courthouse features a central clock tower and four octagonal corner towers, a statue of the Goddess of Justice, and a hipped roof with cross gables, all common features of Washburn's work. It was added to the National Register of Historic Places in 2002.