- Category: Populated Place
- Type: Village
- Latitude/Longitude: 51°46'42"N 2°41'44"W
- Eastings/Northings: 352097, 209112
- OS Grid: SO520091
- Mapcode Local: GBR FL.Z5Y9
- Mapcode Global: VH871.7K6D
Location and coordinates are for the approximate centre of Pen-twyn within this administrative area.
Geographic features and populated places may cross administrative borders.