- Category: Water Feature
- Type: Island
- Latitude/Longitude: 55°37'51"N 6°5'53"W
- Eastings/Northings: 142152, 645113
- OS Grid: NR421451
- Mapcode Local: GBR CFBT.TV2
- Mapcode Global: WGZJT.9QDK
Location and coordinates are for the approximate centre of Sgeir a' Mhuillir within this administrative area.
Geographic features and populated places may cross administrative borders.