- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°24'2"N 3°52'15"W
- Eastings/Northings: 272814, 279730
- OS Grid: SN728797
- Mapcode Local: GBR 91.PX5N
- Mapcode Global: VH4FG.VXHF
Location and coordinates are for the approximate centre of Llyn-yr-oerfa within this administrative area.
Geographic features and populated places may cross administrative borders.