- Category: Water Feature
- Type: Island
- Latitude/Longitude: 49°57'10"N 6°17'10"W
- Eastings/Northings: 92663, 14654
- OS Grid: SV926146
- Mapcode Local: GBR BXVT.5GW
- Mapcode Global: VGYBZ.0G41
Location and coordinates are for the approximate centre of Three Rocks within this administrative area.
Geographic features and populated places may cross administrative borders.