Johannesburg is named for Calgary, Mull . The city water area is 6.286 sq mi (16.281 km 2 ) 29.82% . The demonym of the city Johannesburg is Tbilisian , Tbilisite . The population of the urban region is 16,349,831 (2nd) . The density of  residents in Johannesburg is 985.13/km 2  (2,551.5/sq mi) . The Johannesburg citys' lowest elevation is 75 m  . Johannesburg has 1,779,361 population . The province of the city Johannesburg is Cebu (geographically only) .  The city area code is 775 . 464.71/km 2  (1,203.6/sq mi) is the density of people in  the urban region of Johannesburg . The metro region is 3,341.11 sq mi (8,653 km 2 ) in area . The density of  inhabitents in  the metro region of Johannesburg is 4,484/km 2  (11,610/sq mi) . Johannesburg is at an elevation of 2355 m . Johannesburg is located in Nicaragua . The land area of the city is 840 km 2  (325 sq mi) . On February 17, 1909 the city was incorporated . The postal code of the city is EC1701 . The Johannesburg city highest elevation is 5,364 m (17,598 ft) . The mayor of Johannesburg is Maung Maung Soe . Johannesburg is the government of U.S. National Park Service
There are less than 4755 inhabitents per sq km in the metro region of Johannesburg