Orchardton Tower is a ruined tower house in Kirkcudbrightshire, Dumfries and Galloway, Scotland. It is located four miles (six kilometres) south of Dalbeattie, and one mile (two kilometres) south of Palnackie, in Buittle parish. It is remarkable as the only cylindrical tower house in Scotland. Orchardton Tower is in the care of Historic Environment Scotland as a Scheduled Ancient Monument.