- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°33'56"N 3°26'51"W
- Eastings/Northings: 301984, 297425
- OS Grid: SO019974
- Mapcode Local: GBR 9L.CKVN
- Mapcode Global: WH79Y.0RMV
Location and coordinates are for the approximate centre of Llyn y Tarw within this administrative area.
Geographic features and populated places may cross administrative borders.