0211 is the area code of Johannesburg . On 1871 (Huntington) the city was incorporated . The city water area is 4.12 sq mi (10.67 km 2 ) . Johannesburg has 19.500.000 population . The highest elevation of Johannesburg is 424 m (1,391 ft) . The population of the metro region is Population: 3,113,725  . Johannesburg is at an elevation of 20 ft . The city Johannesburg demonym is Mashhadi, Mashadi, Mashdi (informal) . This city is named after Calgary, Mull . 210.9/km 2  (546.2/sq mi) is the density of inhabitents in  the metro region of Johannesburg . 7,400/km 2  (19,000/sq mi) is the density of residents in Johannesburg . Johannesburg is the government of Swedish Ice Hockey Association . The urban region is Area : 993.5 km2 (383.6 sq mi) in area . The city Johannesburg province is Kadiogo . The Johannesburg citys' lowest elevation is 1,750 m . 56°19′37″N 44°00′27″E﻿ / ﻿56.32694°N 44.00750°E  are the coordinates of the city. . The city has the postal code 080020 . The density of  residents in  the urban region of Johannesburg is 2,305/km 2  (5,970/sq mi) . The mayor of Johannesburg is Armand Béouindé (since 2016) . The city land area is 1.275 sq mi (3.303 sq km )
Johannesburg is 82.97 mabove sea level