Illinois

DuPage County

List of all cities and towns in DuPage County DuPage County is a county in the U.S. state of Illinois, and one of the Chicago metropolitan area’s collar counties. The population was 932,877 as of the 2020 census, making it Illinois’ second-most populous county. Wheaton is the county seat. DuPage County was founded from Cook …

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Douglas County

List of all cities and towns in Douglas County Douglas County is a county in the state of Illinois in the United States. As of the 2020 United States Census, there were 19,740 people living there. Tuscola is the county seat. Douglas County was made from Coles County in 1859. It was named after Stephen …

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DeWitt County

List of all cities and towns in DeWitt County DeWitt County is a county in Illinois, United States. The population was 16,561 at the time of the 2010 census. Clinton is the county seat. On March 1, 1839, the county was founded by combining Macon and McLean counties. DeWitt Clinton, the seventh Governor of New …

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DeKalb County

List of all cities and towns in DeKalb County In the U.S. state of Illinois, there is a county called DeKalb County. As of the 2020 United States Census, there were 100,420 people living there. Sycamore is the county seat. The Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area includes DeKalb County. The US Census Bureau says that …

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Cumberland County

List of all cities and towns in Cumberland County Cumberland County is a county in the state of Illinois in the United States. As of the census in 2010, there were 11,048 people living there. Toledo is the county seat. The Charleston–Mattoon, IL Micropolitan Statistical Area includes Cumberland County. On March 2, 1823, parts of …

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Crawford County

List of all cities and towns in Crawford County Crawford County is a county in the United States state of Illinois. The population was 19,817 at the time of the 2010 census. Robinson serves as the county seat. Crawford County was founded on December 31, 1816, from Edwards County in the Illinois Territory. It covered …

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Cook County

List of all cities and towns in Cook County Cook County is the most populated county in the United States, and the second-most populous county in the world, behind Los Angeles County, California. Cook County is home to more than 40% of all Illinois citizens. The population was 5,275,541 in 2020. Chicago, the most populous …

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Coles County

List of all cities and towns in Coles County Coles County is one of Illinois’s counties. As of the census in 2020, there were 46,863 people living there. The county seat is the city of Charleston, which is also where Eastern Illinois University is located. Coles County is included in the Charleston-Mattoon, IL Combined Statistical …

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Clinton County

List of all cities and towns in Clinton County Clinton County is in the state of Illinois in the United States. At the 2020 census, there were 37,762 people living there. Carlyle is the county seat. In 1960, the United States Census Bureau said that Clinton County, New York, was where most people lived. The …

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Clay County

List of all cities and towns in Clay County Clay County is a county in Illinois, United States. The population was 13,815 according to the 2010 United States Census. From 1842, the county seat has been Louisville, which is located in the county’s center. Clay County was designated as the mean center of population in …

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