St Llibio's Church, Llanllibio

St Llibio's Church, Llanllibio is a demolished church in Anglesey, north Wales. Founded by Llibio in the sixth century, the church served a small community of bondmen as a chapel of ease. The population of Llanllibio declined substantially during the Middle Ages as a result of the Black Death and changes in farming practice, amongst other factors, and the community that the church served effectively disappeared. As a result, St Llibio's closed in the seventeenth century; the remaining worshippers moved to another local church.

Plans in the nineteenth century to rebuild the church, which was in ruins by 1776, came to nothing. Except for a memorial stone, nothing more than "tiny traces" of St Llibio's can now be seen.