- Category: Water Feature
- Type: Island
- Latitude/Longitude: 54°55'41"N 3°55'54"W
- Eastings/Northings: 276304, 560971
- OS Grid: NX763609
- Mapcode Local: GBR 0CZG.K6
- Mapcode Global: WH4W0.KDWD
Location and coordinates are for the approximate centre of Fir Island within this administrative area.
Geographic features and populated places may cross administrative borders.