- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 52°11'15"N 4°6'54"W
- Eastings/Northings: 255500, 256500
- OS Grid: SN555565
- Mapcode Local: GBR DQ.47X2
- Mapcode Global: VH4GH.M8BP
Location and coordinates are for the approximate centre of Llundain-fach within this administrative area.
Geographic features and populated places may cross administrative borders.