The demonym of the city Johannesburg is Guayaquilean . The city province is Cebu (geographically only) .  The city area code is +55 (41) . The lowest elevation of Johannesburg is 380 m  . Johannesburg is at an elevation of 726 m . The city is Area: 572 km2 (221 sq mi) in area . 4,005,015 is the population of the metro region of Johannesburg . The city has the postal code 1100 . The area of the urban region is Area : 993.5 km2 (383.6 sq mi) . The density of  inhabitents in  the urban region of Johannesburg is 3,423/km 2  (8,870/sq mi) . The water area of the city is 3.73 sq mi (9.67 km 2 ) . The coordinates of the city are 26°10′S 28°18′E﻿ / ﻿26.167°S 28.300°E . On November 7, 1861, as Denver City, C.T. the city was incorporated . This city is named after James W. Denver . The density of  people in Johannesburg is 700/km 2  (1,800/sq mi) . The mayor of Johannesburg is Pramila Pandey (BJP) . Johannesburg is located in Flathead County & Glacier County, Montana, United States . 6,600/km 2  (17,000/sq mi) is the density of people in  the metro region of Johannesburg . The Johannesburg city highest elevation is 425 m (1,394 ft)
+55 (41) code is required to call a number in Johannesburg