Llantwit Major (Welsh: Llanilltud Fawr) is a small coastal town and community in the Vale of Glamorgan, Wales, lying on the Bristol Channel coast. It is one of four towns in the Vale of Glamorgan and the third largest by population (13,366 (2001)) after Barry and Penarth, and ahead of Cowbridge, which lies about 4.5 miles (7.2 km) to the northeast.