Llanfairfechan is a town and community in the Conwy County Borough, Wales. It is known as a seaside resort and had a population at the 2001 Census of 3,755, reducing to 3,637 at the 2011 Census. The history of the area dates back to at least Roman times, as demonstrated by the discovery of a large second century milestone, which is now preserved in the British Museum.

Until 1974, Caernarfonshire, sometimes spelled Caernarvonshire or Carnarvonshire, was an administrative county in the north-west of Wales, later classed as one of the thirteen historic counties of Wales.