Pentraeth is a village on the island of Anglesey (Ynys Môn), North Wales, at grid reference SH523786. The Royal Mail postcode begins LL75. The community population taken at the 2011 census was 1,178.
Its Welsh name means at the end of (or head of) a beach, and it is located near Traeth Coch (Red Wharf Bay). There is a small river, Afon Nodwydd which runs through it. The village's ancient name was Llanfair Betws Geraint. In 1170 it was the site of a battle when Hywel ab Owain Gwynedd landed with an army raised in Ireland in an attempt to claim a share of the kingdom of Gwynedd following the death of his father Owain Gwynedd. He was defeated and killed here by the forces of his half-brothers Dafydd ab Owain Gwynedd and Rhodri.
In 1859, Charles Dickens stayed in the village on his trip, as a journalist for The Times, to visit the wreck of the Royal Charter in Moelfre. Between 1908 and 1950 it was served by Pentraeth railway station, on the Red Wharf Bay branch line.
The village has a football side, Pentraeth F.C., who play in the Gwynedd League, the fourth tier of Welsh football.