- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°6'59"N 4°1'33"W
- Eastings/Northings: 264511, 359630
- OS Grid: SH645596
- Mapcode Local: GBR 5V.7LJZ
- Mapcode Global: WH54P.4X5M
Location and coordinates are for the approximate centre of Llyn Idwal within this administrative area.
Geographic features and populated places may cross administrative borders.