Location and coordinates are for the approximate centre of Cogan within this administrative area. Geographic features and populated places may cross administrative borders.
Gazetteer of the British Isles (Edinburgh: Bartholomew, 1887). John Bartholomew
Cogan, par., SE. Glamorgan, 4½ m. SW. of Cardiff, 616 ac., pop. 755; contains hamlet of C. Pill; P.O., T.O.