The coordinates of the city are 26°10′S 28°18′E﻿ / ﻿26.167°S 28.300°E . Johannesburg is at an elevation of 2382 ft . Johannesburg is located in Flathead County & Glacier County, Montana, United States . The Johannesburg city highest elevation is 425 m (1,394 ft) .  The city area code is +55 (41) . The area of the urban region is Area : 993.5 km2 (383.6 sq mi) . The city Johannesburg demonym is Guayaquilean . 700/km 2  (1,800/sq mi) is the density of inhabitents in Johannesburg . The city has the postal code 1100 . 3,423/km 2  (8,870/sq mi) is the density of inhabitents in  the urban region of Johannesburg . The mayor of Johannesburg is Pramila Pandey (BJP) . 4,005,015 is the population of the metro region of Johannesburg . On November 7, 1861, as Denver City, C.T. the city was incorporated . Area: 572 km2 (221 sq mi) is the area of the city namedJohannesburg . The city water area is 3.73 sq mi (9.67 km 2 ) . This city is named after James W. Denver . 6,600/km 2  (17,000/sq mi) is the density of people in  the metro region of Johannesburg . The city Johannesburg province is Cebu (geographically only) . The Johannesburg citys' lowest elevation is 1,250 ft
On November 7, 1861, as Denver City, C.T. the city was awarded the legal declaration of a municipal charter.