- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°0'31"N 3°57'40"W
- Eastings/Northings: 268500, 347500
- OS Grid: SH685475
- Mapcode Local: GBR 5X.GJ74
- Mapcode Global: WH559.3MXW
Location and coordinates are for the approximate centre of Llyn Iwerddon within this administrative area.
Geographic features and populated places may cross administrative borders.