DeWitt County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 15,516. Its county seat is Clinton. The county was formed on March 1, 1839, from Macon and McLean counties. The county was named in honor of the seventh Governor of New York State, DeWitt Clinton.
Montgomery County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 28,288. Its county seat is Hillsboro.
Tazewell County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 131,343. Its county seat and largest city is Pekin. It is pronounced with a short "a", to rhyme with "razz" rather than "raze."
Sangamon County is located in the center of the U.S. state of Illinois. According to the 2020 census, it had a population of 196,343. Its county seat and largest city is Springfield, the state capital.
Randolph County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 30,163. Its county seat is Chester.
Marshall County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 11,742. Its county seat is Lacon.
Livingston County is a county located in the U.S. state of Illinois. According to the 2020 census, it has a population of 35,815. Its county seat is Pontiac. Livingston County comprises the Pontiac, IL Micropolitan Statistical Area, which is combined with the Bloomington–Normal metropolitan statistical area as the Bloomington-Pontiac, IL Combined Statistical Area in upper portion of Central Illinois.
Knox County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 49,967. Its county seat is Galesburg.
Kankakee County is a county located in the U.S. state of Illinois. According to the 2020 census, it has a population of 107,502. Its county seat is Kankakee. Kankakee County comprises the Kankakee, IL Metropolitan Statistical Area.
Iroquois County is a county located in the northeast part of the U.S. state of Illinois. According to the 2020 United States Census, it has a population of 27,077. It is the only county in the United States to be named Iroquois, after the American Indian people. The county seat is Watseka. The county is located along the border with Indiana.
Franklin County is a county in Southern Illinois. At the 2020 census, it had a population of 37,804. The largest city is West Frankfort and the county seat is Benton. This area of Southern Illinois is known locally as "Little Egypt".
Effingham County is located in the south central part of the U.S. state Illinois. As of the 2020 census, the population was 34,668. Its county seat and largest city is Effingham. Some other cities in Effingham County, Illinois include Altamont, Teutopolis, Beecher City, Montrose, Dieterich, Shumway, Watson, Mason, and Edgewood. Effingham County comprises the Effingham, IL Micropolitan Statistical Area.
Edwards County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 6,245. Its county seat is Albion.
Clark County is a county located in the southeastern part of U.S. state of Illinois, along the Indiana state line. As of the 2020 census, the population was 15,455. Its county seat is Marshall. The county was named for George Rogers Clark, an officer who served in the American Revolution.
Christian County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 34,032. Its county seat is Taylorville.
Carroll County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 15,702. Its county seat is Mount Carroll.
Bond County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 16,725. Its county seat is Greenville.
Concord Township is one of twenty-five townships in Bureau County, Illinois, USA. As of the 2020 census, its population was 1,423 and it contained 738 housing units.
The U.S. State of Illinois currently has 43 statistical areas that have been delineated by the Office of Management and Budget (OMB). On March 6, 2020, the OMB delineated 11 combined statistical areas, 13 metropolitan statistical areas, and 19 micropolitan statistical areas in Illinois.
