This city is named after Confluence of Grand River and Gunnison River . The mayor of Karachi is Kwon Young-jin , (Liberty Korea) . On 1799 (Guyandotte) the city was incorporated . The Karachi citys' lowest elevation is 7 ft . The metro region has 4,291,577 (3rd)(population of the Federal District) population . Karachi is at an elevation of 10 m . The postal code of the city is 207, 208, 220 - 224, 226 - 228, 231 - 239, 241 - 244, 247 - 249, 251 - 253 . The city province is Alborz . The city Karachi demonym is Mashhadi, Mashadi, Mashdi (informal) . 720/km 2  (1,900/sq mi) is the density of residents in  the metro region of Karachi . The land area of the city is 5,490.35 km 2  (2,119.84 sq mi) . Karachi is located in Zulia . 242 is the area code of Karachi . 3,039,444 is the population of the urban region of Karachi . Karachi is the government of Swedish Ice Hockey Association . The area of the city is Area : 22,142 km2 (8,549 sq mi) . 36°18′N 59°36′E﻿ / ﻿36.300°N 59.600°E are the coordinates of the city. . 2,300/km 2  (6,100/sq mi) is the density of inhabitents in  the urban region of Karachi
There are more than 6050 residents per sq mi in the urban region of Karachi