- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°19'10"N 3°45'16"W
- Eastings/Northings: 280500, 270500
- OS Grid: SN805705
- Mapcode Local: GBR 96.VVM9
- Mapcode Global: VH5CC.VYYQ
Location and coordinates are for the approximate centre of Llyn Fyrddon Fawr within this administrative area.
Geographic features and populated places may cross administrative borders.