St Illtyd's Church may refer to any of several churches in Wales dedicated to Illtud, also known as Illtyd:Church of St Illtyd, Caldey Island, Pembrokeshire Church of St Illtyd, Llanelltyd, Gwynedd St Illtyd's Church, Llanhilleth, Blaenau Gwent Church of St Rhidian and St Illtyd, Llanrhidian, Gower, Swansea Church of St Illtyd, St Gwynno and St Dyfodwg, LLantrisant, Rhondda Cynon Taff St Illtyd's Church, Llantrithyd, Vale of Glamorgan St Illtyd's Church, Llantwit Major, Vale of Glamorgan Church of St Illtyd, Mamhilad, Monmouthshire St Illtyd's Church, Oxwich, Gower, Swansea Church of St Illtyd, Pembry, Carmarthenshire Church of St Illtyd, Penrice, Swansea