The city has the postal code 34000 to 34990 . The density of  residents in  the metro region of Chicago, Illinois is 2,200/km 2  (5,700/sq mi) . The city water area is 1.420 sq mi (3.677 km 2 )  13.73% . The city land area is 48.42 sq mi (125.41 km 2 ) . The city Chicago, Illinois demonym is Medellinense  ,  Paisa . Chicago, Illinois is at an elevation of 22 m . The coordinates of the city are 15°25′S 28°17′E﻿ / ﻿15.417°S 28.283°E . 3,423/km 2  (8,870/sq mi) is the density of inhabitents in  the urban region of Chicago, Illinois . 3,194.38/km 2  (8,273.4/sq mi) is the density of people in Chicago, Illinois . On 1842 the city was incorporated . The population of the metro region is Population (2014): 7,360,703 . The Chicago, Illinois city highest elevation is 5,364 m (17,598 ft) . +226 is the area code of Chicago, Illinois . The population of the urban region is 16,349,831 (2nd) . The city is 385.8 sq mi (999.3 sq km ) in area . Chicago, Illinois is located in Colombia . Soham El Wardini (2018) (BSS/PS) is the mayor of Chicago, Illinois . Chicago, Illinois is the government of Swedish Ice Hockey Association
The people of the city Chicago, Illinois are also known as Saigonese