The Chicago, Illinois city highest elevation is 91 m (299 ft) . The mayor of Chicago, Illinois is Solomon Mguni . The postal code of the city is 130000 . 234.72 km 2  (90.63 sq mi) is the area of the urban region of Chicago, Illinois . 4,484/km 2  (11,610/sq mi) is the density of inhabitents in  the metro region of Chicago, Illinois . The city is Area: 572 km2 (221 sq mi) in area . The coordinates of the city are 51°30′N 116°00′W﻿ / ﻿51.5°N 116.0°W﻿ / 51.5; -116.0 . The province of the city Chicago, Illinois is Davao del Sur  (geographically only) . Chicago, Illinois is located in People's Republic of China . The city Chicago, Illinois demonym is Cartagenero(s) (in Spanish) . Chicago, Illinois is named for Confluence of Grand River and Gunnison River . Chicago, Illinois is the government of Ministry of Culture . 3,300/km 2  (8,600/sq mi) is the density of residents in  the urban region of Chicago, Illinois . The density of  residents in Chicago, Illinois is 850/km 2  (2,200/sq mi) . 0211 is the area code of Chicago, Illinois . Chicago, Illinois is at an elevation of 13 ft . The water area of the city is 0.49 sq mi (1.27 km 2 ) . The population of the metro region is Population (2015): 2,500,000 . The land area of the city is 16.0 sq mi (41.4 sq km) . The Chicago, Illinois citys' lowest elevation is 380 m 
The peak of Chicago, Illinois is at 241.9 m (793.6 ft)