- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°0'21"N 5°4'49"W
- Eastings/Northings: 188678, 238671
- OS Grid: SM886386
- Mapcode Local: GBR CF.HVXD
- Mapcode Global: VH1QC.WVL0
Location and coordinates are for the approximate centre of Ynys y Ddinas within this administrative area.
Geographic features and populated places may cross administrative borders.