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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. What is now Illinois was claimed as part of Illinois County, Virginia, between 1778 and 1782.
Of the 102 counties in the state of Illinois, 17 are divided into minor civil divisions known as precincts. [1] The 261 [ citation needed ] such precincts in Illinois are listed below. The remaining 85 counties are divided into 1,433 townships . [ 1 ]
From 1947 until 1988, the Illinois portion of the Chicago metro area was served by a single area code, 312, which abutted the 815 area code. In 1988 the 708 area code was introduced and the 312 area code became exclusive to the city of Chicago.
As of September 2023, the average value of a single-family home in the Chicago area was just over $370,000 — about $20,000 above the U.S. average. But in parts of the area, home prices soar far ...
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 ]
ZIP Code prefixes: 600xx–608xx. Area codes: ... Cook County, Illinois – Racial and ethnic composition ... temperatures in Chicago, Cook County average daytime ...
312: Chicago, the central city area including the Chicago Loop and the Near North Side. 618/730: Southern Illinois, including Carbondale and most of the Metro East region of St. Louis suburbs in Illinois. 630/331: West suburbs of Chicago in DuPage County and Kane County including Wheaton, Naperville, and Aurora. Area code 630 was overlaid with ...
Thornton Township is one of 29 townships in Cook County, Illinois. As of the 2020 census, its population was 157,865. [1] Incorporated in 1850, it is located immediately south of the city of Chicago. It is the second most populous township in Illinois as of the 2020 census, after Rockford Township (pop. 170,478) in Winnebago County. [1]