- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 51°59'3"N 3°35'23"W
- Eastings/Northings: 290913, 232955
- OS Grid: SN909329
- Mapcode Local: GBR YF.K06C
- Mapcode Global: VH5F6.QDJ5
Location and coordinates are for the approximate centre of Pentre-bach within this administrative area.
Geographic features and populated places may cross administrative borders.