39°08′N 117°11′E﻿ / ﻿39.133°N 117.183°E are the coordinates of the city. . The mayor of Tianjin is Zhang Guoqing . The area of the metro region is Area: 5,609.9 km2 (2,166.0 sq mi)The population of the metro region is Population: 12,491,300 (2016) . The urban region is 11,609.91 km 2  (4,482.61 sq mi) in area . 1,300/km 2  (3,400/sq mi) is the density of inhabitents in Tianjin . The city has the postal code 3000 00 -  3019 00 . 22 is the area code of Tianjin . The demonym of the city Tianjin is Tianjinese , Tianjiner . The city land area is 11,609.91 km 2  (4,482.61 sq mi) . The city water area is 186 km 2  (72 sq mi) . Tianjin is located in People's Republic of China
There are less than 12492563 residents in the metro region of Tianjin