Cylch-y-Garn is a community in Anglesey, Wales, located on the north west coast of the county, 9.0 miles west of Amlwch, 12.5 miles north east of Holyhead and 15.0 miles north west of Llangefni. It includes the villages of Llanfair-yng-Nghornwy, Llanrhyddlad and Rhydwyn, plus Llanrhwydrys, Caerau and Cemlyn. the north west tip of the island at Carmel Head, and the offshore islands of the Skerries and West Mouse.