- Category: Water Feature
- Type: Island
- Latitude/Longitude: 54°51'42"N 4°38'1"W
- Eastings/Northings: 231061, 555068
- OS Grid: NX310550
- Mapcode Local: GBR GHYV.L7B
- Mapcode Global: WH2SS.S2N6
Location and coordinates are for the approximate centre of Fern Island within this administrative area.
Geographic features and populated places may cross administrative borders.