- Category: Populated Place
- Type: Village
- Latitude/Longitude: 51°41'53"N 3°8'56"W
- Eastings/Northings: 320688, 200579
- OS Grid: SO206005
- Mapcode Local: GBR HZ.48LQ
- Mapcode Global: VH6D8.CKLY
Location and coordinates are for the approximate centre of Pen-twyn within this administrative area.
Geographic features and populated places may cross administrative borders.