- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 53°16'8"N 3°19'42"W
- Eastings/Northings: 311500, 375500
- OS Grid: SJ115755
- Mapcode Local: GBR 5Z6M.6V
- Mapcode Global: WH76P.V365
Location and coordinates are for the approximate centre of Pen-y-cefn within this administrative area.
Geographic features and populated places may cross administrative borders.