DeWitt County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 16,561. 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.
Walworth County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 102,228. Its county seat is Elkhorn. The county was created in 1836 from Wisconsin Territory and organized in 1839. It is named for Reuben H. Walworth. Walworth County comprises the Whitewater-Elkhorn, WI Micropolitan Statistical Area and is included in the Milwaukee-Racine-Waukesha, WI Combined Statistical Area. Lake Geneva, the University of Wisconsin-Whitewater, and Alpine Valley Resort, and Music Theatre are located in Walworth County.
Winnebago County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 285,350 making it the seventh most populous county in Illinois behind Cook County and its five surrounding collar counties. Its county seat is Rockford. Winnebago County is the central county of the Rockford Metropolitan Statistical Area.
Whiteside County is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 58,498. Its county seat is Morrison. The county is bounded on the west by the Mississippi River. Whiteside County comprises the Sterling, IL Micropolitan Statistical Area, which is also included in the Dixon-Sterling, IL Combined Statistical Area. U.S. President Ronald Reagan was born in 1911 in the Whiteside County community of Tampico.
Warren County is a county in the U.S. state of Illinois. According to the 2010 census, it had a population of 17,707. Its county seat is Monmouth.
Tazewell County is a county in the U.S. state of Illinois. According to the 2010 census, it had a population of 135,394. Its county seat and largest city is Pekin. It is pronounced with a short "a", to rhyme with "razz" rather than "raze".
Shelby County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 20,990. Its county seat is Shelbyville.
Rock Island County is a county located in the U.S. state of Illinois, bounded on the west by the Mississippi River. According to the 2010 census, it had a population of 147,546. Its county seat is Rock Island; its largest city is neighboring Moline. Rock Island County is one of the four counties that make up the Davenport-Moline-Rock Island, IA-IL Metropolitan Statistical Area.
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.
Pulaski County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 5,193. Its county seat is Mound City. It is located along the Ohio River in the southwestern portion of the state, known locally as "Little Egypt".
McLean County is the largest county by land area in the U.S. state of Illinois. According to the 2010 census, it had a population of 169,572. Its county seat is Bloomington. McLean County is included in the Bloomington–Normal, IL Metropolitan Statistical Area.
Kendall County is a county in the U.S. state of Illinois, within the Chicago metropolitan area. According to the 2020 census, it has a population of 131,869. Its county seat is Yorkville, and its most populous municipality is Oswego.
Kankakee County is a county located in the U.S. state of Illinois. According to the 2010 census, it has a population of 113,449. Its county seat is Kankakee. Kankakee County comprises the Kankakee, IL Metropolitan Statistical Area.
Fayette County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 22,140. Its county seat is Vandalia. Ramsey Lake State Recreation Area is located in the northwest part of this county.
Christian County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 34,800. Its county seat is Taylorville. Christian County comprises the Taylorville, IL Micropolitan Statistical Area, which is also included in the Springfield-Jacksonville-Lincoln, IL Combined Statistical Area.
Brown County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 6,937. Its county seat is Mount Sterling.
Palos Park is a village in southwestern Cook County, Illinois, United States. Per the 2020 census, the population was 4,899.
Streamwood is a village in Cook County, Illinois, United States. Per the 2020 census, the population was 39,577. It is a northwest suburb of Chicago, and is a part of the Chicago metropolitan area.
East Moline is a city in Rock Island County, Illinois, United States. The population was 21,374 at the 2020 census. East Moline is part of the Quad Cities, along with the cities of Rock Island, Moline, and the Iowa cities of Davenport and Bettendorf. As of 2011, the Quad Cities has a population estimate of 381,342.
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.
