- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°59'30"N 3°59'45"W
- Eastings/Northings: 266117, 345690
- OS Grid: SH661456
- Mapcode Local: GBR 5W.HFRY
- Mapcode Global: WH55G.L297
Location and coordinates are for the approximate centre of Llyn Croesor within this administrative area.
Geographic features and populated places may cross administrative borders.