- Category: Water Feature
- Type: Island
- Latitude/Longitude: 57°31'5"N 7°12'11"W
- Eastings/Northings: 88589, 859496
- OS Grid: NF885594
- Mapcode Local: GBR 88LV.KDT
- Mapcode Global: WGW3S.B93D
Location and coordinates are for the approximate centre of Dùn an t-Siamain within this administrative area.
Geographic features and populated places may cross administrative borders.