Llanberis is a village in Gwynedd, North Wales, lying on the southern banks of Llyn Padarn in Snowdonia. It takes its name from Saint Peris, an early Welsh saint.

According to the United Kingdom Census 2001, the population of Llanberis was 1,954. The census also revealed that 81% of the population speak Welsh fluently, with all of those aged 10-15 able to speak the language.

The village originally grew around the slate quarrying industry, but since the closure of the quarries the main employers have been tourism, the Dinorwig power station, a pumped storage hydroelectric station, Siemens Diagnostics and DMM. The ruins of Dolbadarn Castle, built by Llywelyn ap Iorwerth in the 13th century, stand above the town, famously painted by Richard Wilson and J.M.W. Turner.

Llanberis is a popular base for ascents of Snowdon (Yr Wyddfa in Welsh), the highest mountain in Wales and England. The Llanberis Path begins in the town, and although one of the longest routes, it is therefore the shallowest and hence the easiest. It is the most popular walking route to the summit, largely following the line of the Snowdon Mountain Railway.