- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°32'51"N 3°40'51"W
- Eastings/Northings: 286111, 295756
- OS Grid: SN861957
- Mapcode Local: GBR 99.DNC0
- Mapcode Global: VH5BG.47V8
Location and coordinates are for the approximate centre of Llyn Nantddeiliog within this administrative area.
Geographic features and populated places may cross administrative borders.