- Category: Water Feature
- Type: Island
- Latitude/Longitude: 57°37'0"N 7°9'58"W
- Eastings/Northings: 91637, 870285
- OS Grid: NF916702
- Mapcode Local: GBR 88PL.JCC
- Mapcode Global: WGW36.WTNB
Location and coordinates are for the approximate centre of Lonachan within this administrative area.
Geographic features and populated places may cross administrative borders.