Llangefni is the county town of Anglesey in Wales and contains the principal offices of the Isle of Anglesey County Council. According to the UK Census 2001, the population of Llangefni was 4,500 people and is the second largest settlement on the island. The census also reveals that 83.8% of the population speak Welsh fluently, with the highest percentage of speakers being in the 10-14 age group where 95.2% are able to speak Welsh.