- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 53°5'39"N 4°8'21"W
- Eastings/Northings: 256846, 357366
- OS Grid: SH568573
- Mapcode Local: GBR 5P.92Z2
- Mapcode Global: WH54T.DH48
Location and coordinates are for the approximate centre of Cwm Dwythwch within this administrative area.
Geographic features and populated places may cross administrative borders.