- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 54°59'4"N 4°55'54"W
- Eastings/Northings: 212500, 569500
- OS Grid: NX125695
- Mapcode Local: GBR GH6J.MPB
- Mapcode Global: WH2RW.6ZR1
Location and coordinates are for the approximate centre of Penwhirn Reservoir within this administrative area.
Geographic features and populated places may cross administrative borders.