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There are 102 counties in Illinois. The most populous of these is Cook County, the second-most populous county in the United States and the home of Chicago, while the least populous is Hardin County. The largest by land area is McLean County, while the smallest is Putnam County. Illinois's FIPS state code is 17 and its postal abbreviation is IL.
In the United States, inner suburbs (sometimes known as "first-ring" suburbs) are the older, more densely populated communities of a metropolitan area with histories that significantly predate those of their suburban or exurban counterparts. Most inner suburbs share a common border with the principal city of the metropolitan area and developed ...
The basic subdivisions of Illinois are the 102 counties. [2] Illinois has more units of local government than any other state—over 8,000 in all. [3] The Constitution of 1970 created, for the first time in Illinois, a type of "home rule", which allows localities to govern themselves to a certain extent. [4]
847/224 (North and Northwest Suburbs) 630/331 (Outer Western Suburbs) 708 (South and Near West Suburbs) 815/779 (Rockford & Joliet: Far Northwest/Southwest Suburbs) 219 (Northwest Indiana) 574 (North-central Indiana) 262 (Southeast Wisconsin surrounding Milwaukee County)
Illinois is the 13th-wealthiest of the 50 United States, with a per capita income of $37,728 according to the 2020 census. Illinois counties ranked by per capita income [ edit ]
According to the 2020 United States census, Illinois is the 6th most populous state with 12,812,508 inhabitants but the 24th largest by land area spanning 55,499.0 square miles (143,742 km 2) of land. [1] Illinois is divided into 102 counties and, as of 2020, contained 1,300 municipalities consisting of cities, towns, and villages.
This is a list of the area codes in the state of Illinois and its numbering plan areas in the North American Numbering Plan.. All NPAs within Illinois. 217/447: Central Illinois, including the region running west from the Illinois-Indiana border through Danville, Effingham, Champaign–Urbana, Decatur, Springfield, Quincy until Illinois' western border with Missouri and Iowa
Collar counties is a colloquialism for DuPage, Kane, Lake, McHenry, and Will counties, the five counties of Illinois that border Cook County, which is home to Chicago. The collar counties are part of the Chicago metropolitan area and comprise many of the area's suburbs .