Chicago, Illinois is the government of Parks Canada . The city was incorporated in 1 October 1984 . 36°18′N 59°36′E﻿ / ﻿36.300°N 59.600°E are the coordinates of the city. . The population of Chicago, Illinois is Population (2012): 3,937,451 . Chicago, Illinois is at an elevation of 1050 ft . The water area of the city is 129.3 km 2  (49.9 sq mi) . The postal code of the city is 8320000 . The area of the metro region is 4,558.4 sq km (1,760.0 sq mi) . The province of the city Chicago, Illinois is Gauteng . The Chicago, Illinois citys' lowest elevation is 75 m  . The population of the urban region is 3,435,394 . The density of  inhabitents in  the urban region of Chicago, Illinois is 3,300/km 2  (8,600/sq mi) . The highest elevation of Chicago, Illinois is 2,715 m (8,907 ft) . The city Chicago, Illinois demonym is Alexandrian, Alexandrine (Arabic: إسكندراني‎) . Chicago, Illinois is named for Christ Church, Oxford . The city land area is 8.921 sq mi (23.106 km 2 ) . Kakha Kaladze is the mayor of Chicago, Illinois . Chicago, Illinois is located in Zulia .  The city area code is (+593) 4
15.13 percentage is land in Chicago, Illinois