The density of  residents in Tianjin is 11,312/km 2  (29,298/sq mi) . 8°50′18″S 13°14′4″E﻿ / ﻿8.83833°S 13.23444°E are the coordinates of the city. . Oscar Moreno (PDP-Laban) is the mayor of Tianjin . Population: 12,491,300 (2016) is the population of the metro region of Tianjin . Tianjin is named for Christopher Columbus . 2,200/km 2  (5,700/sq mi) is the density of residents in  the metro region of Tianjin . Tianjin is the government of U.S. National Park Service . The Tianjin city highest elevation is 2,715 m (8,907 ft) . The density of  people in  the urban region of Tianjin is 3,300/km 2  (8,600/sq mi) . The city land area is 48.42 sq mi (125.41 km 2 ) . The water area of the city is 21 km 2  (8 sq mi) . The city was incorporated in 1871-11-04 . The city has the postal code 95100 . The demonym of the city Tianjin is cuzqueno/a . Tianjin is located in Brazil . The city Tianjin province is Lusaka Province .  The city area code is (+593) 4 . 7,860,781 is the population of the urban region of Tianjin . Tianjin has Population (2015): 2,200,000 population
There are more than 2101 residents per sq km in the metro region of Tianjin