Johannesburg is located in Flathead County & Glacier County, Montana, United States . The mayor of Johannesburg is Pramila Pandey (BJP) . The province of the city Johannesburg is Cebu (geographically only) . The city has the postal code 1100 . The city Johannesburg demonym is Guayaquilean . The lowest elevation of Johannesburg is 380 m  . The city was incorporated in November 7, 1861, as Denver City, C.T. . The population of the metro region is 4,005,015 . The Johannesburg city highest elevation is 425 m (1,394 ft) . 3,423/km 2  (8,870/sq mi) is the density of inhabitents in  the urban region of Johannesburg . 26°10′S 28°18′E﻿ / ﻿26.167°S 28.300°E are the coordinates of the city. . The city is Area: 572 km2 (221 sq mi) in area . Johannesburg is at an elevation of 2382 ft .  The city area code is +55 (41) . The density of  inhabitents in  the metro region of Johannesburg is 6,600/km 2  (17,000/sq mi) . The density of  people in Johannesburg is 700/km 2  (1,800/sq mi) . The city water area is 3.73 sq mi (9.67 km 2 ) . Area : 993.5 km2 (383.6 sq mi) is the area of the urban region of Johannesburg . This city is named after James W. Denver
The urban region is more than 1167 sq mi)