Tripoli District (Arabic: طرابلس عروس البحر, Aros Al baher Ṭarābulus) is one of the 22 first level subdivisions (بلدية) of Libya. Its capital and largest city is Tripoli, the national capital. Tripoli District is in the Tripolitania region of northwestern Libya. The district has a shoreline along the coast of the Mediterranean Sea in the north (Gulf of Tripoli), Zawiya in the west, Jafara in the southwest, Jabal al Gharbi in the south and Murqub in the east.