- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°55'12"N 3°52'5"W
- Eastings/Northings: 274500, 337500
- OS Grid: SH745375
- Mapcode Local: GBR 61.N2VQ
- Mapcode Global: WH55Q.KV8N
Location and coordinates are for the approximate centre of Llyn Hiraethlyn within this administrative area.
Geographic features and populated places may cross administrative borders.