- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°49'48"N 3°59'25"W
- Eastings/Northings: 266006, 327711
- OS Grid: SH660277
- Mapcode Local: GBR 5W.TP5C
- Mapcode Global: WH567.P414
Location and coordinates are for the approximate centre of Llyn Cwmhosan within this administrative area.
Geographic features and populated places may cross administrative borders.