Dumbarton (; ) is a town and burgh which is the administrative centre of the council area of West Dunbartonshire, and formerly of the historic county of Dunbartonshire, in the West-Central Lowlands of Scotland. The town lies on the north bank of the River Clyde where the River Leven flows into the Clyde estuary. As of 2006, the town had an estimated population of 19,990 and forms a conurbation with Alexandria, Bonhill and Renton with a combined estimated population of 44,690.