- Category: Water Feature
- Type: Island
- Latitude/Longitude: 55°34'35"N 2°35'34"W
- Eastings/Northings: 362717, 631576
- OS Grid: NT627315
- Mapcode Local: GBR B3BY.FV
- Mapcode Global: WH8Y3.43KD
Location and coordinates are for the approximate centre of Oldmill Island within this administrative area.
Geographic features and populated places may cross administrative borders.