- Category: Water Feature
- Type: Island
- Latitude/Longitude: 57°41'40"N 7°7'4"W
- Eastings/Northings: 95182, 878704
- OS Grid: NF951787
- Mapcode Local: GBR 88TD.2K0
- Mapcode Global: WGW2V.MVRP
Location and coordinates are for the approximate centre of Sgeir a' Siar within this administrative area.
Geographic features and populated places may cross administrative borders.