The Church of St Illtyd is Grade II* Listed Building in the city and county of Swansea in south Wales. It is 1 km from Oxwich village, on a site overlooking Oxwich Bay and reached by the Wales Coast Path. It has a square churchyard with a stone wall and a modern gate. The church was originally listed on 6 March 1964. The church was originally dedicated to Hylledd, and no reason is known as to why it was changed.