- Category: Water Feature
- Type: Island
- Latitude/Longitude: 53°12'46"N 4°30'15"W
- Eastings/Northings: 232867, 371354
- OS Grid: SH328713
- Mapcode Local: GBR 56.1Q8V
- Mapcode Global: WH42X.SH7S
Location and coordinates are for the approximate centre of Ynys Sych within this administrative area.
Geographic features and populated places may cross administrative borders.