Llyn Irddyn, Gwynedd

• Parish/Community: Dyffryn Ardudwy
• Unitary Authority: Gwynedd
• Region: Wales

• Category: Water Feature
• Type: Inland Water

• Latitude/Longitude: 52°46'46"N 4°1'58"W
• Eastings/Northings: 262985, 322166
• OS Grid: SH629221
• Mapcode Local: GBR 5T.XYNB
• Mapcode Global: WH56F.0DWF

Location and coordinates are for the approximate centre of Llyn Irddyn within this administrative area. Geographic features and populated places may cross administrative borders.