- Category: Water Feature
- Type: Island
- Latitude/Longitude: 54°41'25"N 4°21'54"W
- Eastings/Northings: 247657, 535373
- OS Grid: NX476353
- Mapcode Local: GBR HJL9.P8K
- Mapcode Global: WH3VT.XCKP
Location and coordinates are for the approximate centre of Mare Rock within this administrative area.
Geographic features and populated places may cross administrative borders.