The city Chicago, Illinois demonym is Guayaquilean . 1,401,687 is the population of the metro region of Chicago, Illinois . Chicago, Illinois is at an elevation of 2355 m . The Chicago, Illinois city highest elevation is 424 m (1,391 ft) . Chicago, Illinois is named for Cartagena, Spain . The postal code of the city is 34000 to 34990 . The province of the city Chicago, Illinois is Santiago Province . The city was incorporated in March 6, 1836 (city) . The mayor of Chicago, Illinois is Alejandro Char  ,  (Radical Change) . The land area of the city is 138.75 sq mi (359.36 km 2 ) . 14,100/km 2  (37,000/sq mi) is the density of people in  the urban region of Chicago, Illinois . The lowest elevation of Chicago, Illinois is 7 ft . The area of the city is Area: 116 km2 (45 sq mi) . (0)2 is the area code of Chicago, Illinois . Chicago, Illinois is located in India . Chicago, Illinois is the government of National Park Service . The urban region is 1,770 sq mi (4,600 km 2 ) in area . 2,900/km 2  (7,400/sq mi) is the density of residents in Chicago, Illinois . The water area of the city is 1.63 sq mi (4.23 km 2 ) 1.1%
There are 3580 residents per km 2 in Chicago, Illinois