- Category: Water Feature
- Type: Island
- Latitude/Longitude: 58°20'56"N 5°10'42"W
- Eastings/Northings: 214096, 944461
- OS Grid: NC140444
- Mapcode Local: GBR F6LN.GS2
- Mapcode Global: WH16C.FD9V
Location and coordinates are for the approximate centre of Sgeir Thòmais within this administrative area.
Geographic features and populated places may cross administrative borders.