- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°4'54"N 3°10'24"W
- Eastings/Northings: 321500, 354500
- OS Grid: SJ215545
- Mapcode Local: GBR 6Y.9X87
- Mapcode Global: WH77K.7S4P
Location and coordinates are for the approximate centre of Llyn Cyfynwy within this administrative area.
Geographic features and populated places may cross administrative borders.