The city was incorporated in 1842 . +226 is the area code of Chicago, Illinois . The urban region has 16,349,831 (2nd) population . Soham El Wardini (2018) (BSS/PS) is the mayor of Chicago, Illinois . The population of the metro region is Population (2014): 7,360,703 . Chicago, Illinois is located in Colombia . Chicago, Illinois is at an elevation of 72 ft . The city land area is 48.42 sq mi (125.41 km 2 ) . The city Chicago, Illinois demonym is Medellinense  ,  Paisa . Chicago, Illinois is the government of Swedish Ice Hockey Association . The highest elevation of Chicago, Illinois is 5,364 m (17,598 ft) . 3,423/km 2  (8,870/sq mi) is the density of inhabitents in  the urban region of Chicago, Illinois . 385.8 sq mi (999.3 sq km ) is the area of the city namedChicago, Illinois . The city water area is 1.420 sq mi (3.677 km 2 )  13.73% . The postal code of the city is 34000 to 34990 . 3,194.38/km 2  (8,273.4/sq mi) is the density of people in Chicago, Illinois . The coordinates of the city are 15°25′S 28°17′E﻿ / ﻿15.417°S 28.283°E . The density of  residents in  the metro region of Chicago, Illinois is 2,200/km 2  (5,700/sq mi)
Medellinense  ,  Paisa is another name for the people of the city Chicago, Illinois