775 is the area code of Cairo . The postal code of the city is 207, 208, 220 - 224, 226 - 228, 231 - 239, 241 - 244, 247 - 249, 251 - 253 . The highest elevation of Cairo is 241.9 m (793.6 ft) . The city Cairo demonym is Catanesi . The city Cairo province is Algiers Province . The mayor of Cairo is Kwon Young-jin , (Liberty Korea) . Cairo is the government of Bristol City Council . The population of the urban region is 3,039,444 . Cairo is at an elevation of 5 m . This city is named after Christopher Columbus . The density of  inhabitents in Cairo is 2,818/km 2  (7,300/sq mi) (May 27, 2019) .  39°1′10″N 125°44′17″E﻿ / ﻿39.01944°N 125.73806°E are the coordinates of the city. . The city is 6.07 sq mi (15.73 km 2 ) in area . 1,600/sq km  (4,200/sq mi) is the density of people in  the metro region of Cairo . The density of  inhabitents in  the urban region of Cairo is 4,800/km 2  (12,000/sq mi) . The city land area is 225.73 sq km  (87.15 sq mi) . The water area of the city is 551.92 sq mi (1,429.46 km 2 ) . The metro region is 5,860 km 2  (2,261 sq mi) in area . Cairo is located in Flathead County & Glacier County, Montana, United States . The Cairo citys' lowest elevation is 75 m 
The city is at a height of 16 ft