- Category: Water Feature
- Type: Island
- Latitude/Longitude: 59°58'22"N 1°12'12"W
- Eastings/Northings: 444571, 1121160
- OS Grid: HU445211
- Mapcode Local: GBR R2CC.Z3Z
- Mapcode Global: XHD44.RL2D
Location and coordinates are for the approximate centre of Stack of Billyageo within this administrative area.
Geographic features and populated places may cross administrative borders.