Brynrefail is a small village in Gwynedd, Wales. The village is in the Arfon and the Gwynedd Council Ward of Penisa'r Waun. It is close to the northern shore of Llyn Padarn lake. Along the main street there are mainly traditional terraced houses. Notable buildings include the village's post office and the village's sole chapel, which is still in use. The village is protected from Llanberis and has a dedicated community beat manager.