The city water area is 6.286 sq mi (16.281 km 2 ) 29.82% . The city province is Cebu (geographically only) . 985.13/km 2  (2,551.5/sq mi) is the density of residents in Johannesburg . The density of  people in  the urban region of Johannesburg is 464.71/km 2  (1,203.6/sq mi) . This city is named after Calgary, Mull . Johannesburg is at an elevation of 2355 m .  The city area code is 775 . The lowest elevation of Johannesburg is 75 m  . The highest elevation of Johannesburg is 5,364 m (17,598 ft) . 3,341.11 sq mi (8,653 km 2 ) is the area of the metro region of Johannesburg . The mayor of Johannesburg is Maung Maung Soe . The city has the postal code EC1701 . The city Johannesburg demonym is Tbilisian , Tbilisite . The population of Johannesburg is 1,779,361 . Johannesburg is the government of U.S. National Park Service . 16,349,831 (2nd) is the population of the urban region of Johannesburg . On February 17, 1909 the city was incorporated . The density of  inhabitents in  the metro region of Johannesburg is 4,484/km 2  (11,610/sq mi) . The city land area is 840 km 2  (325 sq mi) . Johannesburg is located in Nicaragua
To send a post to the city use 207, 208, 220 - 224, 226 - 228, 231 - 239, 241 - 244, 247 - 249, 251 - 253 as zip.