- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°16'43"N 3°30'54"W
- Eastings/Northings: 296723, 265598
- OS Grid: SN967655
- Mapcode Local: GBR 9J.YF6G
- Mapcode Global: VH5CQ.0ZZG
Location and coordinates are for the approximate centre of Llyn Aberdeuddwr within this administrative area.
Geographic features and populated places may cross administrative borders.