The area of the metro region is 3,913 sq mi (10,130 km 2 ) . 3,351/km 2  (8,680/sq mi) is the density of residents in Chicago, Illinois . 8,600/km 2  (22,000/sq mi) is the density of residents in  the urban region of Chicago, Illinois . The highest elevation of Chicago, Illinois is 33 m (108 ft) . Chicago, Illinois is located in Cameroon . Chicago, Illinois is at an elevation of 2382 ft . Population (2014): 5,160,512 is the population of the urban region of Chicago, Illinois . +82-53 is the area code of Chicago, Illinois . The coordinates of the city are 25°00′40″N 121°26′45″E﻿ / ﻿25.01111°N 121.44583°E . The city is Area : 126 km2 (49 sq mi) in area . The land area of the city is 1,117.11 km 2  (431.32 sq mi) . This city is named after Cartagena, Spain . On December 23, 1814 (village) the city was incorporated . Chicago, Illinois is the government of Swedish Ice Hockey Association . The city has the postal code 34000 to 34990 . The water area of the city is 0.736 sq mi (1.905 sq km) 36.58%
There are 22000 residents per sq mi in the urban region of Chicago, Illinois