Hartlepool (65), a seaport of Durham, situated on a tongue of land which forms the Bay of Hartlepool, 4 m. N. of the Tees estuary; the chief industries are shipbuilding, cement works, and a shipping trade, chiefly in coal and iron. West Hartlepool (43), lies on the opposite and south side of the bay, 1 m. distant, but practically forming one town with Hartlepool, and carries on a similar trade, but on a somewhat larger scale; the extensive docks, stretching between the two towns, cover an area of 300 acres.