Llanberis is a village, community and electoral ward in Gwynedd, northwest Wales, on the southern bank of the lake Llyn Padarn and at the foot of Snowdon, the highest mountain in Wales. It is a centre for outdoor activities in Snowdonia, including walking, mountaineering, climbing, mountain biking and pony trekking, as well as water sports such as scuba diving. The community includes Nant Peris.
Llanberis takes its name from Saint Peris, an early Welsh saint. It is twinned with the Italian town of Morbegno in Lombardy.