This city is named after Cartagena, Spain . The lowest elevation of Chicago, Illinois is 2 m  . The demonym of the city Chicago, Illinois is Guayaquilean . The population of the metro region is 1,401,687 . Chicago, Illinois is located in India . Chicago, Illinois is at an elevation of 2355 m . The density of  residents in  the urban region of Chicago, Illinois is 14,100/km 2  (37,000/sq mi) . 2,900/km 2  (7,400/sq mi) is the density of residents in Chicago, Illinois . 1,770 sq mi (4,600 km 2 ) is the area of the urban region of Chicago, Illinois . Chicago, Illinois is the government of National Park Service .  The city area code is (0)2 . The city was incorporated in March 6, 1836 (city) . The highest elevation of Chicago, Illinois is 424 m (1,391 ft) . The province of the city Chicago, Illinois is Santiago Province . The city has the postal code 34000 to 34990 . The mayor of Chicago, Illinois is Alejandro Char  ,  (Radical Change) . The city land area is 138.75 sq mi (359.36 km 2 ) . Area: 116 km2 (45 sq mi) is the area of the city namedChicago, Illinois . The city water area is 1.63 sq mi (4.23 km 2 ) 1.1%
To send a mail to the city use 080020 as zip.