- Category: Water Feature
- Type: Island
- Latitude/Longitude: 59°1'21"N 2°54'6"W
- Eastings/Northings: 348323, 1015400
- OS Grid: HY483154
- Mapcode Local: GBR M46W.FDS
- Mapcode Global: WH7BZ.DHF4
Location and coordinates are for the approximate centre of Helliar Holm within this administrative area.
Geographic features and populated places may cross administrative borders.