Llantwit Major is located in southeast Wales and mid-west along the coast of the Vale of Glamorgan. The town can be accessed from the north directly by the B4268 road and indirectly by the B4270 road (St. Athan road) which branches from the A48 road, and directly by the B4265 road which leads to Bridgend in the northwest and Cardiff Airport and Barry in the east. It is one of four towns in the Vale of Glamorgan with the third largest population after Barry and Penarth, and ahead of Cowbridge, which is about to the northeast. Llantwit Major is about from Bridgend, 10 miles from Barry and about from Cardiff. Boverton is an eastern suburb of Llantwit.