Pontyclun (or Pont-y-clun) is a village in the County Borough of Rhondda Cynon Taf, Wales. It is served by the South Wales Main Line and has its own local rugby union club. Like other surrounding towns, it has seen a sharp increase in its population in the last ten years as people migrate south from the South Wales Valleys, and west from the capital city of Cardiff. Pontyclun translates from the Welsh language as 'bridge over the River Clun', the Clun being a tributary to the River Ely, that runs through Pontyclun. A bridge crosses the Afon Clun just before its confluence with the Ely.