- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°29'48"N 3°52'20"W
- Eastings/Northings: 272985, 290421
- OS Grid: SN729904
- Mapcode Local: GBR 91.HWQ1
- Mapcode Global: VH4F2.THNQ
Location and coordinates are for the approximate centre of Llyn Nantycagal within this administrative area.
Geographic features and populated places may cross administrative borders.