- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°57'5"N 4°0'26"W
- Eastings/Northings: 265228, 341237
- OS Grid: SH652412
- Mapcode Local: GBR 5V.L50J
- Mapcode Global: WH55N.D2XM
Location and coordinates are for the approximate centre of Llyn Mair within this administrative area.
Geographic features and populated places may cross administrative borders.