- Category: Water Feature
- Type: Island
- Latitude/Longitude: 50°40'6"N 1°30'23"W
- Eastings/Northings: 434975, 85529
- OS Grid: SZ349855
- Mapcode Local: GBR 799.3XK
- Mapcode Global: FRA 77Q9.QX7
Location and coordinates are for the approximate centre of Mermaid Rock within this administrative area.
Geographic features and populated places may cross administrative borders.