- Category: Water Feature
- Type: Island
- Latitude/Longitude: 55°56'32"N 6°9'50"W
- Eastings/Northings: 140094, 679984
- OS Grid: NR400799
- Mapcode Local: GBR CF50.7F0
- Mapcode Global: WGZH7.9W0V
Location and coordinates are for the approximate centre of Post Rocks within this administrative area.
Geographic features and populated places may cross administrative borders.