- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°17'36"N 3°46'36"W
- Eastings/Northings: 278917, 267624
- OS Grid: SN789676
- Mapcode Local: GBR 95.XNRC
- Mapcode Global: VH5CK.HM67
Location and coordinates are for the approximate centre of Llyn Hir within this administrative area.
Geographic features and populated places may cross administrative borders.