- Category: Water Feature
- Type: Bay
- Latitude/Longitude: 50°23'16"N 3°29'51"W
- Eastings/Northings: 293631, 55281
- OS Grid: SX936552
- Mapcode Local: GBR QY.G0YV
- Mapcode Global: FRA 38K0.P6C
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.