- Category: Water Feature
- Type: Island
- Latitude/Longitude: 56°28'28"N 6°7'55"W
- Eastings/Northings: 145637, 739047
- OS Grid: NM456390
- Mapcode Local: GBR CC7L.XNZ
- Mapcode Global: WGZDQ.SJ48
Location and coordinates are for the approximate centre of Eilean Casach within this administrative area.
Geographic features and populated places may cross administrative borders.