The city land area is 11,609.91 km 2  (4,482.61 sq mi) . Area: 5,609.9 km2 (2,166.0 sq mi) is the area of the metro region of TianjinThe metro region has Population: 12,491,300 (2016) population . Tianjin is located in People's Republic of China . 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 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 Tianjin demonym is Tianjinese , Tianjiner . The postal code of the city is 3000 00 -  3019 00 . The water area of the city is 186 km 2  (72 sq mi) .  The city area code is 22
There are less than 12489646 residents in the metro region of Tianjin