- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 52°56'2"N 3°32'28"W
- Eastings/Northings: 296500, 338500
- OS Grid: SH965385
- Mapcode Local: GBR 6G.MB7R
- Mapcode Global: WH670.KJW5
Location and coordinates are for the approximate centre of Cefn-ddwysarn within this administrative area.
Geographic features and populated places may cross administrative borders.