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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.
312 Chicago - City (The Loop and central neighborhoods, e.g. the Near North Side) 773 Chicago - City (Everywhere else within the city limits, excluding central area) 872 Chicago - City (overlay for 312 & 773, effective November 7, 2009) 847/224 (North and Northwest Suburbs) 630/331 (Outer Western Suburbs) 708 (South and Near West Suburbs)
The Census Bureau created the metropolitan district for the 1910 census as a standardized classification for large urban centers and their surrounding areas. The original threshold for a metropolitan district was 200,000, but was lowered to 100,000 in 1930 and 50,000 in 1940. [12]
At the time its boundaries were the city limits at North Avenue and Wood Street to its respective north and west, Randolph Street to its south, and the Chicago River to its east. In 1847 it was moved to the Loop and Near South Side, being bounded by the Chicago River to its north and west, 22nd Street (modern-day Cermak) to its south, and Wells ...
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]
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 ...
When Chicago was founded in 1837, most of the early building was around the mouth of the Chicago River, as can be seen on a map of the city's original 58 blocks. [104] The overall grade of the city's central, built-up areas is relatively consistent with the natural flatness of its overall natural geography, generally exhibiting only slight ...
In the 1920s, the University of Chicago created the community area system of city subdivision with the current names that continue to be used today. [7] The community areas although not formally adopted by the United States Census Bureau are largely consistent with census tract boundaries. The Washington Park community area and its census ...