- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 51°47'1"N 4°4'54"W
- Eastings/Northings: 256500, 211500
- OS Grid: SN565115
- Mapcode Local: GBR DR.YXWB
- Mapcode Global: VH4JG.6FJG
Location and coordinates are for the approximate centre of Pen-twyn within this administrative area.
Geographic features and populated places may cross administrative borders.