- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°3'30"N 4°8'58"W
- Eastings/Northings: 256030, 353401
- OS Grid: SH560534
- Mapcode Local: GBR 5P.C6G0
- Mapcode Global: WH550.7D66
Location and coordinates are for the approximate centre of Llyn y Dywarchen within this administrative area.
Geographic features and populated places may cross administrative borders.