The postal code of the city is 34000 to 34990 . The density of  residents in  the metro region of Jersey City, New Jersey is 6,600/km 2  (17,000/sq mi) . 57 + 5 is the area code of Jersey City, New Jersey . 2,121 km 2  (819 sq mi) is the area of the city namedJersey City, New Jersey . The coordinates of the city are 35°50′08″N 51°00′37″E﻿ / ﻿35.83556°N 51.01028°E . The city land area is 138.75 sq mi (359.36 km 2 ) . On February 17, 1909 the city was incorporated . The Jersey City, New Jersey city highest elevation is 91 m (299 ft) . The mayor of Jersey City, New Jersey is Geraldo Júlio de Mello Filho (Geraldo Júlio) (PSB) . The density of  residents in Jersey City, New Jersey is 3,194.38/km 2  (8,273.4/sq mi) . Jersey City, New Jersey is named for James W. Denver . The city province is Alborz . Jersey City, New Jersey is located in Melanesia . The demonym of the city Jersey City, New Jersey is Recifense . Jersey City, New Jersey is the government of Swedish Ice Hockey Association . Jersey City, New Jersey is at an elevation of 277 m . The density of  people in  the urban region of Jersey City, New Jersey is 5,400/sq km  (14,000/sq mi) . The city water area is 129.3 km 2  (49.9 sq mi) . The Jersey City, New Jersey citys' lowest elevation is 246 ft
In the map the city could be found at 35°50′08″N 51°00′37″E﻿ / ﻿35.83556°N 51.01028°E by Jersey City, New Jersey