FLINT, a municipal borough and county town in Wales, on the Dee estuary, 1 1 2 m. N.W. of Chester by rail. Pop. (1931), 7,635. Flint castle was built on an isolated rock by the river side by Edward I., who made the little settlement that grew beneath the castle a borough. The town received a charter from Edward III. and the Black Prince, as earl of Chester. It was held for the king during the civil war but twice taken, after siege, by the parliament, and finally dismantled in 1647. The town lived on as a country market town and small seaport until the i9th century, when it became associated with the coal and metal industries of the localities; now it has alkali and chemical works.