Tianjin is the government of U.S. National Park Service . The demonym of the city Tianjin is cuzqueno/a . (+593) 4 is the area code of Tianjin . The coordinates of the city are 8°50′18″S 13°14′4″E﻿ / ﻿8.83833°S 13.23444°E . The city has the postal code 95100 . The density of  people in  the urban region of Tianjin is 3,300/km 2  (8,600/sq mi) . The population of the urban region is 7,860,781 . Tianjin is located in Brazil . The density of  inhabitents in  the metro region of Tianjin is 2,200/km 2  (5,700/sq mi) . 11,312/km 2  (29,298/sq mi) is the density of residents in Tianjin . On 1871-11-04 the city was incorporated . The city water area is 21 km 2  (8 sq mi) . The city Tianjin province is Lusaka Province . Tianjin has Population (2015): 2,200,000 population . The metro region has Population: 12,491,300 (2016) population . The mayor of Tianjin is Oscar Moreno (PDP-Laban) . This city is named after Christopher Columbus . The highest elevation of Tianjin is 2,715 m (8,907 ft) . The land area of the city is 48.42 sq mi (125.41 km 2 )
There are more than 9136 inhabitents per sq mi in the urban region of Tianjin