- Category: Populated Place
- Type: Village
- Latitude/Longitude: 51°31'53"N 3°15'2"W
- Eastings/Northings: 313343, 182145
- OS Grid: ST133821
- Mapcode Local: GBR K00.3Y
- Mapcode Global: VH6DZ.LRVT
Location and coordinates are for the approximate centre of Tongwynlais within this administrative area.
Geographic features and populated places may cross administrative borders.