BARTIN, a town in the vilayet of Zunguldak in Turkey, re taining the name of the ancient village Parthenia and situated near the mouth of the Bartan-su (anc. Parthenius), which formed part of the boundary between Bithynia and Paphlagonia. The town, which is the residence of a kaimmakam, is built on two low limestone hills and its streets are paved with limestone blocks. It is noted for the fine box-wood grown in the vicinity, is a port of call for Black sea coasting steamers and carries on a considerable trade with Constantinople which might be increased were it not for the obstruction of the harbour by a bar. Pop. (1927), 64,227.