The land area of the city is 16.0 sq mi (41.4 sq km) . The urban region has Population: 3,160,000 (2006) population . The Karachi citys' lowest elevation is 0 ft . Karachi is the government of Municipality of Quito . This city is named after Christopher Columbus . The density of  residents in Karachi is 3,351/km 2  (8,680/sq mi) . The highest elevation of Karachi is 1,879 m (6,165 ft) . On November 7, 1861, as Denver City, C.T. the city was incorporated . (+20) 2 is the area code of Karachi . Population: 3,113,725  is the population of the metro region of Karachi . 210.9/km 2  (546.2/sq mi) is the density of residents in  the metro region of Karachi . The city has the postal code 130000 . The density of  residents in  the urban region of Karachi is 4,800/km 2  (12,000/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 Karachi demonym is Recifense . The water area of the city is 4.12 sq mi (10.67 km 2 ) . Karachi is at an elevation of 16 ft . The city Karachi province is Jilin . Karachi is located in Sanma Province, Vanuatu . The mayor of Karachi is Takele Uma Benti
On 1842 the city was awarded the legal declaration of a municipal charter.