 The city area code is +55 81 . Tianjin is the government of Ministry of Culture . Tianjin is located in Iwaki, Fukushima, Japan . The postal code of the city is 9XXXXXX . The density of  residents in Tianjin is 850/km 2  (2,200/sq mi) . The metro region has Population: 12,491,300 (2016) population . The lowest elevation of Tianjin is 378 m  . The density of  residents in  the urban region of Tianjin is 2,300/km 2  (6,100/sq mi) . The land area of the city is 316.42 km 2  (122.17 sq mi) . This city is named after Rao Jodha . The demonym of the city Tianjin is Indorian . The Tianjin city highest elevation is 14,110 ft (4,300 m) . Tianjin is at an elevation of 2250 m . 1,275/km 2  (3,300/sq mi) is the density of people in  the metro region of Tianjin . 6°13′51″N 75°35′26″W﻿ / ﻿6.23083°N 75.59056°W are the coordinates of the city. . On December 23, 1814 (village) the city was incorporated . The city province is Jilin . The water area of the city is 4.46 sq km  (1.72 sq mi) . The mayor of Tianjin is Federico Gutiérrez, 2016-2019 . 1,407.2 sq mi (3,645 sq km) is the area of the urban region of Tianjin
1.25 percentage is water in Tianjin