- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°6'0"N 4°8'13"W
- Eastings/Northings: 257006, 357997
- OS Grid: SH570579
- Mapcode Local: GBR 5P.8PH1
- Mapcode Global: WH54T.FB4T
Location and coordinates are for the approximate centre of Llyn Dwythwch within this administrative area.
Geographic features and populated places may cross administrative borders.