16°51′N 96°11′E﻿ / ﻿16.850°N 96.183°E are the coordinates of the city. . The city has the postal code 21500 . The density of  people in  the metro region of Johannesburg is 2,813/km 2  (7,290/sq mi) . The urban region has 3,372,090 population . The metro region has 8,653,521 , 8,917,749 (Extended UA) population . The density of  people in Johannesburg is 630/sq km  (1,600/sq mi) . Johannesburg is at an elevation of 184 m . Takele Uma Benti is the mayor of Johannesburg . The city Johannesburg demonym is Indorian . The city land area is 225.73 sq km  (87.15 sq mi) . The city Johannesburg province is Liaoning . 9 is the area code of Johannesburg . Johannesburg is located in Sanma Province, Vanuatu . On 1871-11-04 the city was incorporated . The water area of the city is 3.4 sq mi (8.8 sq km) . The lowest elevation of Johannesburg is 1,240 ft . Area: 418 km2 (161 sq mi) is the area of the city namedJohannesburg . Johannesburg is the government of Ministry of Culture . This city is named after Miami-Illinois:  shikaakwa  ,  (wild onion or wild garlic) . The highest elevation of Johannesburg is 424 m (1,391 ft) . 4,800/km 2  (12,000/sq mi) is the density of residents in  the urban region of Johannesburg
Johannesburg is 5 mabove sea level