Llyn Iwerddon, Gwynedd

• Parish/Community: Ffestiniog
• Unitary Authority: Gwynedd
• Region: Wales

• Category: Water Feature
• Type: Inland Water

• Latitude/Longitude: 53°0'42"N 3°57'38"W
• Eastings/Northings: 268548, 347842
• OS Grid: SH685478
• Mapcode Local: GBR 5X.GBBF
• Mapcode Global: WH559.4K5J

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