Tripoli District is one of the 22 first level subdivisions 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, Zawiya in the west, Jafara in the southwest, Jabal al Gharbi in the south and Murqub in the east. Per the census estimates of 2012, the total population in the region was 157,747 with 150,353 Libyans.