Llanfaelog is a village and community in western Anglesey, Wales. It is situated some 13 kilometres south-east of Holyhead and 22 kilometres west of the city of Bangor. At the 2001 census, it had a population of 1,679, increasing to 1,758 at the 2011 Census. The community includes Rhosneigr, Bryn Du, and Pencarnisiog. The population of the village itself is less than 400.