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The Chicago metropolitan area represents about 3 percent of the entire US population. Chicagoland has one of the world's largest and most diversified economies. With more than six million full and part-time employees, the Chicago metropolitan area is a key factor of the Illinois economy, as the state has an annual GDP of over $1 trillion. [7]
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 Southland is a region comprising the south and southwest suburbs of the City of Chicago in the U.S. state of Illinois.Home to roughly 2.5 million residents, this region has been known as the Southland by the local populace and regional media for over 20 years. [1]
Chicago is also divided into 77 community areas which were drawn by University of Chicago researchers in the late 1920s. [3] Chicago's community areas are well-defined, generally contain multiple neighborhoods, and depending on the neighborhood, less commonly used by residents. [2] [4]
In the Chicago area, the limestone underwent a further transformation into dolostone. Dolostone is the bedrock beneath Chicago's dense layer of clay and glacial debris. The world's second largest aggregate quarry, Thornton Quarry , exists just south of the city limits in the suburb of Thornton .
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Hoffman Estates is a village in Cook County, Illinois, United States.It is a suburb of Chicago.Per the 2020 census, the population was 52,530. [3]The village previously served as the headquarters for Sears and is one of the American headquarters for Mori Seiki.
Melrose Park is a village in Leyden and Proviso Townships, Cook County, Illinois, United States.It is a suburb of Chicago.As of the 2020 census it had a population of 24,796.