Llantrisant is a town and community in the county borough of Rhondda Cynon Taf, Wales. It lies within the historic county boundaries of Glamorgan, on the River Ely and the Afon Clun. The three saints of the town's name are Illtyd, Gwynno, and Dyfodwg. Llantrisant is a hilltop settlement, at an altitude of 174 m (571 ft) above sea level. The town is home to the Royal Mint.