- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°53'12"N 3°59'50"W
- Eastings/Northings: 265702, 334008
- OS Grid: SH657340
- Mapcode Local: GBR 5W.Q1G6
- Mapcode Global: WH55V.KPPV
Location and coordinates are for the approximate centre of Llyn Dû within this administrative area.
Geographic features and populated places may cross administrative borders.