The First Arthur County Courthouse and Jail stand on Marshall Street between Fir and Elm streets in Arthur. The frame courthouse, 26 by 28 feet, was built in 1914 for $980, and the jail, with three wooden cells, in 1915; they served until 1962, and the courthouse is billed as the smallest in the United States. Listed on the National Register in 1990, they are kept as museums by the Arthur County Historical Society, open by appointment.