Johannesburg is the government of U.S. National Park Service . Johannesburg is named for Calgary, Mull . 1,779,361 is the population of Johannesburg . Johannesburg is located in Nicaragua . The population of the urban region is 16,349,831 (2nd) . The Johannesburg city highest elevation is 5,364 m (17,598 ft) . 4,484/km 2  (11,610/sq mi) is the density of people in  the metro region of Johannesburg . The city was incorporated in February 17, 1909 . The Johannesburg citys' lowest elevation is 246 ft . Johannesburg is at an elevation of 7726 ft . The mayor of Johannesburg is Maung Maung Soe . The postal code of the city is EC1701 . The city province is Cebu (geographically only) . The city water area is 6.286 sq mi (16.281 km 2 ) 29.82% . The metro region is 3,341.11 sq mi (8,653 km 2 ) in area .  The city area code is 775 . The density of  residents in Johannesburg is 985.13/km 2  (2,551.5/sq mi) . The city land area is 840 km 2  (325 sq mi) . The density of  people in  the urban region of Johannesburg is 464.71/km 2  (1,203.6/sq mi) . The city Johannesburg demonym is Tbilisian , Tbilisite
Johannesburg was legally declared as a city in 1799 (Guyandotte)