- Category: Water Feature
- Type: Island
- Latitude/Longitude: 53°7'55"N 4°24'52"W
- Eastings/Northings: 238553, 362150
- OS Grid: SH385621
- Mapcode Local: GBR 5B.6N2V
- Mapcode Global: WH43C.5J1S
Location and coordinates are for the approximate centre of Ynys y Mochyn within this administrative area.
Geographic features and populated places may cross administrative borders.