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