4,484/km 2  (11,610/sq mi) is the density of people in  the metro region of Johannesburg . The land area of the city is 840 km 2  (325 sq mi) . The province of the city Johannesburg is Cebu (geographically only) . The water area of the city is 6.286 sq mi (16.281 km 2 ) 29.82% . The urban region has 16,349,831 (2nd) population . This city is named after Calgary, Mull . Johannesburg is at an elevation of 2355 m . The mayor of Johannesburg is Maung Maung Soe . Johannesburg is the government of U.S. National Park Service . 3,341.11 sq mi (8,653 km 2 ) is the area of the metro region of Johannesburg . The city has the postal code EC1701 . 985.13/km 2  (2,551.5/sq mi) is the density of residents in Johannesburg . The city was incorporated in February 17, 1909 . The density of  people in  the urban region of Johannesburg is 464.71/km 2  (1,203.6/sq mi) . Johannesburg is located in Nicaragua . The demonym of the city Johannesburg is Tbilisian , Tbilisite . The Johannesburg citys' lowest elevation is 75 m  . 775 is the area code of Johannesburg . The highest elevation of Johannesburg is 5,364 m (17,598 ft) . 1,779,361 is the population of Johannesburg
The zip code of the city Johannesburg is EC1701