Tianjin is located in Brazil . Tianjin is named for Christopher Columbus . Oscar Moreno (PDP-Laban) is the mayor of Tianjin . The water area of the city is 21 km 2  (8 sq mi) . The density of  people in  the urban region of Tianjin is 3,300/km 2  (8,600/sq mi) . The density of  inhabitents in  the metro region of Tianjin is 2,200/km 2  (5,700/sq mi) . The urban region has 7,860,781 population . The coordinates of the city are 8°50′18″S 13°14′4″E﻿ / ﻿8.83833°S 13.23444°E . The city province is Lusaka Province . On 1871-11-04 the city was incorporated . The postal code of the city is 95100 . The demonym of the city Tianjin is cuzqueno/a . The population of the metro region is Population: 12,491,300 (2016) . The city land area is 48.42 sq mi (125.41 km 2 ) . Tianjin is the government of U.S. National Park Service . Tianjin has Population (2015): 2,200,000 population . The highest elevation of Tianjin is 2,715 m (8,907 ft) .  The city area code is (+593) 4 . 11,312/km 2  (29,298/sq mi) is the density of residents in Tianjin
12491686 citizen live in the metro region of Tianjin