Location and coordinates are for the approximate centre of Derwen within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Derwen, par. and ry. sta., on S. border of Denbighshire, 5 miles NW. of Corwen, 3554 ac., pop. 535; P.O.