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