- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°45'1"N 3°15'19"W
- Eastings/Northings: 313426, 206492
- OS Grid: SO134064
- Mapcode Local: GBR HT.0ZTC
- Mapcode Global: VH6D0.J89H
Location and coordinates are for the approximate centre of Cwm Tyswg within this administrative area.
Geographic features and populated places may cross administrative borders.