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Location map of Chicago metropolitan area name Chicago metropolitan area border coordinates 42.336 -88.465 ←↕→ -87.304 41.426 map center
A map of the 77 community areas, broken down by purported regions. While the areas have official use and definition, the color groupings are unofficial, and such "regions" may be defined differently, grouped differently, or not be used at all. The city of Chicago is divided into 77 community areas for statistical and planning purposes.
The Chicago MSA, now defined by the U.S. Office of Management and Budget (OMB) as the Chicago–Naperville–Elgin, IL–IN–WI Metropolitan Statistical Area, is the third-largest MSA by population in the United States. The 2022 census estimate for the population of the MSA was 9,441,957.
As the city grew and annexed adjacent towns, problems arose with duplicate street names and a confusing numbering system based on the Chicago River. On June 22, 1908, the city council adopted a system proposed by Edward P. Brennan; [2] amended June 21, 1909. The changes were effective September 1, 1909 for most of the city. [3]
This is a list of airports in Illinois (a U.S. state), grouped by type and sorted by location.It contains all public-use and military airports in the state. Some private-use and former airports may be included where notable, such as previously public-use airports, those with commercial enplanements recorded by the FAA or airports assigned an IATA airport code.
Chicago's present natural geography is a result of the large glaciers of the Ice Age, namely the Wisconsinan Glaciation that carved out the modern basin of Lake Michigan (which formed from the glacier's meltwater). The city of Chicago itself sits on the Chicago Plain, a flat plain that was once the bottom of ancestral Lake Chicago. This plain ...
Nearly the entire western boundary of Illinois is the Mississippi River, except for a few areas where the river has changed course. Illinois' southeastern and southern boundary is along the Wabash River and the Ohio River, whereas its northern boundary and much of its eastern boundary are straight survey (longitudinal and latitudinal) lines ...