Llangefni (Welsh for 'church on the river Cefni';[2] Welsh pronunciation: [ɬaŋˈɡɛvni]) is the county town of Anglesey in Wales.[3] At the 2011 census, Llangefni's population was 5,116, making it the second-largest town in the county and the largest on the island.[1] The community includes the village of Rhosmeirch.