- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 53°15'57"N 3°19'58"W
- Eastings/Northings: 311203, 375160
- OS Grid: SJ112751
- Mapcode Local: GBR 5Z5N.7Y
- Mapcode Global: WH76P.S54K
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.