- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 58°53'15"N 2°54'48"W
- Eastings/Northings: 347448, 1000370
- OS Grid: HY474003
- Mapcode Local: GBR M557.G33
- Mapcode Global: WH7CK.6WW4
Location and coordinates are for the approximate centre of St Mary's Bay within this administrative area.
Geographic features and populated places may cross administrative borders.