Llandygai is a small village and community on the A5 road between Bangor and Talybont in Gwynedd, Wales. It affords a view of the nearby Carneddau mountain range. The population of the community taken at the 2011 Census was 2,487. Llandygai community includes nearby Tregarth and Mynydd Llandygai and also the pass of Nant Ffrancon.