Llanllyfni is a small village and a community in Gwynedd, Wales. The community consists of the villages of Drws-y-coed, Nantlle, Nasareth, Nebo, Penygroes, Talysarn and the village of Llanllyfni itself. As a community the 2011 census recorded a population of 4135. It is a largely Welsh speaking village; 85% of the villagers speak Welsh as their first language.