- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 56°12'40"N 3°37'0"W
- Eastings/Northings: 299810, 703248
- OS Grid: NN998032
- Mapcode Local: GBR 1R.DPDH
- Mapcode Global: WH5Q3.D4WR
Location and coordinates are for the approximate centre of Castlehill Reservoir within this administrative area.
Geographic features and populated places may cross administrative borders.