- Category: Water Feature
- Type: Island
- Latitude/Longitude: 60°22'30"N 1°27'58"W
- Eastings/Northings: 429531, 1165810
- OS Grid: HU295658
- Mapcode Local: GBR Q1Q9.YN3
- Mapcode Global: XHD23.9HH2
Location and coordinates are for the approximate centre of Sillock Holm within this administrative area.
Geographic features and populated places may cross administrative borders.