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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.
Illinois is divided into 102 counties and, as of 2020, contained 1,300 municipalities consisting of cities, towns, and villages. The most populous city is Chicago with 2,746,388 residents while the least populous is Valley City with 14 residents.
The Illinois Counties section of the gazetteer lists the cities, towns, neighborhoods and subdivisions for each of the 102 Illinois Counties. Also see Illinois County: ZIP Codes | Physical, Cultural & Historical Features | Census Data | Land, Farms, & Ranches
There are 102 counties in the state of Illinois. Old counties. Dane County was renamed in 1840 to the current Christian County. The original Knox County, Illinois, became extinct with the formation of the Illinois Territory in 1809. It became Knox County, Indiana.
The following is a list of cities in Illinois, by letter. For towns and villages, go to List of towns and villages in Illinois .
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 County Map FREE! Check the list of 102 Counties in Illinois and their County Seats in alphabetical order by populations, areas, date of formation and more at Whereig.com.
