16,349,831 (2nd) is the population of the urban region of Johannesburg . 464.71/km 2  (1,203.6/sq mi) is the density of people in  the urban region of Johannesburg . The area of the metro region is 3,341.11 sq mi (8,653 km 2 ) . On February 17, 1909 the city was incorporated . The lowest elevation of Johannesburg is 75 m  . The city land area is 840 km 2  (325 sq mi) . The water area of the city is 6.286 sq mi (16.281 km 2 ) 29.82% . Johannesburg is the government of U.S. National Park Service . Johannesburg is at an elevation of 2355 m . The city Johannesburg demonym is Tbilisian , Tbilisite . The mayor of Johannesburg is Maung Maung Soe . 4,484/km 2  (11,610/sq mi) is the density of people in  the metro region of Johannesburg . The city has the postal code EC1701 . The province of the city Johannesburg is Cebu (geographically only) . Johannesburg has 1,779,361 population . 985.13/km 2  (2,551.5/sq mi) is the density of residents in Johannesburg . Johannesburg is located in Nicaragua .  The city area code is 775 . This city is named after Calgary, Mull . The Johannesburg city highest elevation is 5,364 m (17,598 ft)
There are 11610 inhabitents per sq mi in the metro region of Johannesburg