Karachi is at an elevation of 16 ft . The Karachi city highest elevation is 1,879 m (6,165 ft) . 3,351/km 2  (8,680/sq mi) is the density of people in Karachi . This city is named after Christopher Columbus . The population of the metro region is Population: 3,113,725  .  The city area code is (+20) 2 . The density of  residents in  the urban region of Karachi is 4,800/km 2  (12,000/sq mi) . The city water area is 4.12 sq mi (10.67 km 2 ) . Karachi is located in Sanma Province, Vanuatu . On November 7, 1861, as Denver City, C.T. the city was incorporated . The demonym of the city Karachi is Recifense . The mayor of Karachi is Takele Uma Benti . The urban region has Population: 3,160,000 (2006) population . Karachi is the government of Municipality of Quito . The city land area is 16.0 sq mi (41.4 sq km) . The city province is Jilin . The lowest elevation of Karachi is 0 m  . The density of  people in  the metro region of Karachi is 210.9/km 2  (546.2/sq mi) . 59°20′17″N 018°04′20″E﻿ / ﻿59.33806°N 18.07222°E﻿ / 59.33806; 18.07222 are the coordinates of the city. . The city has the postal code 130000
There are more than 3321 people per sq km in Karachi