- Category: Water Feature
- Type: Island
- Latitude/Longitude: 60°47'32"N 0°46'45"W
- Eastings/Northings: 466561, 1212760
- OS Grid: HP665127
- Mapcode Local: GBR S0F6.TSN
- Mapcode Global: XHF70.9Z7V
Location and coordinates are for the approximate centre of Hagmark Stack within this administrative area.
Geographic features and populated places may cross administrative borders.