- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°46'10"N 3°52'22"W
- Eastings/Northings: 273748, 320757
- OS Grid: SH737207
- Mapcode Local: GBR 61.YFR0
- Mapcode Global: WH56H.HN13
Location and coordinates are for the approximate centre of Llyn Cynwch within this administrative area.
Geographic features and populated places may cross administrative borders.