Bargoed (Welsh: Bargod) is a town in the Rhymney Valley, Wales, one of the South Wales Valleys. It lies on the Rhymney River in the county borough of Caerphilly and straddles ancient boundary of Glamorgan and Monmouthshire, with Bargoed originally lying within the old county of Glamorganshire whereas Aberbargoed was in the old county of Monmouthshire. 'Greater Bargoed', as defined by the local authority Caerphilly County Borough Council, consists of the towns of Bargoed, Aberbargoed and the village of Gilfach. The combined population of these settlements is approximately 13,000.