2,500/km 2  (6,600/sq mi) is the density of inhabitents in  the metro region of Chicago, Illinois . The city land area is 840 km 2  (325 sq mi) . (+251) 11 is the area code of Chicago, Illinois . The metro region has 1,973,470 (2016 Census) population . The postal code of the city is 130000 . The density of  inhabitents in Chicago, Illinois is 1,600/km 2  (4,200/sq mi) (2011) . The lowest elevation of Chicago, Illinois is 378 m  . The city is 19.4 sq mi (50.2 sq km) in area . The province of the city Chicago, Illinois is Santiago Province . The urban region is 1,770 sq mi (4,600 km 2 ) in area . The city was incorporated in 1799 (Guyandotte) . Chicago, Illinois is at an elevation of 2250 m . The highest elevation of Chicago, Illinois is 770 m (2,530 ft) . The coordinates of the city are  4°16′4″S 15°17′31″E﻿ / ﻿4.26778°S 15.29194°E . Chicago, Illinois is located in Indonesia . The mayor of Chicago, Illinois is Pramila Pandey (BJP) . Chicago, Illinois is the government of Municipality of Quito . The demonym of the city Chicago, Illinois is Tianjinese , Tianjiner . The city water area is 41.21 sq mi (106.73 km 2 ) . 464.71/km 2  (1,203.6/sq mi) is the density of inhabitents in  the urban region of Chicago, Illinois . This city is named after James W. Denver
Land covers840 km 2 area of the city