- Category: Water Feature
- Type: Island
- Latitude/Longitude: 51°52'2"N 5°12'27"W
- Eastings/Northings: 179267, 223612
- OS Grid: SM792236
- Mapcode Local: GBR C8.SDZH
- Mapcode Global: VH0TM.PBBC
Location and coordinates are for the approximate centre of Ystafelloedd within this administrative area.
Geographic features and populated places may cross administrative borders.