- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°14'9"N 3°48'12"W
- Eastings/Northings: 276937, 261302
- OS Grid: SN769613
- Mapcode Local: GBR Y4.175V
- Mapcode Global: VH5CY.1224
Location and coordinates are for the approximate centre of Llyn Du within this administrative area.
Geographic features and populated places may cross administrative borders.