- Category: Water Feature
- Type: Island
- Latitude/Longitude: 49°58'11"N 6°16'55"W
- Eastings/Northings: 93068, 16526
- OS Grid: SV930165
- Mapcode Local: GBR BXWR.MCQ
- Mapcode Global: VGYBZ.20BZ
Location and coordinates are for the approximate centre of Mackerel Rocks within this administrative area.
Geographic features and populated places may cross administrative borders.