- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°45'39"N 4°47'29"W
- Eastings/Northings: 211739, 321807
- OS Grid: SH117218
- Mapcode Local: GBR GPJD.KY3
- Mapcode Global: WH33S.CVKQ
Location and coordinates are for the approximate centre of Bardsey Island within this administrative area.
Geographic features and populated places may cross administrative borders.