- Category: Water Feature
- Type: Island
- Latitude/Longitude: 56°12'2"N 3°23'27"W
- Eastings/Northings: 313802, 701758
- OS Grid: NO138017
- Mapcode Local: GBR 21.F654
- Mapcode Global: WH6RB.WDGW
Location and coordinates are for the approximate centre of Castle Island within this administrative area.
Geographic features and populated places may cross administrative borders.