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."
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 2020 census, it had a population of 144,672. 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.
Macoupin County is located in the U.S. state of Illinois. According to the 2020 census, it had a population of 44,967. The county seat is Carlinville.
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.
LaSalle County is located within the Fox Valley and Illinois River Valley regions of the U.S. state of Illinois. As of the 2020 Census, it had a population of 109,658. Its county seat and largest city is Ottawa. LaSalle County is part of the Ottawa, IL Micropolitan Statistical Area of Northern Illinois.
Jackson County is a county located in the U.S. state of Illinois with a population of 52,974 at the 2020 census. Its county seat is Murphysboro, and its most populous city is Carbondale, home to the main campus of Southern Illinois University. The county was incorporated on January 10, 1816, and named for Andrew Jackson. The community of Brownsville served as the fledgling county's first seat.
Grundy County is a county in the U.S. state of Illinois. According to the 2020 census, it has a population of 52,533. Its county seat is Morris.
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".
Bureau County is a county located in the U.S. state of Illinois. As of the 2020 United States Census, the population was 33,244. Its county seat is Princeton.
Dalzell is a village in Bureau and LaSalle counties in the U.S. state of Illinois. The population was 663 at the 2020 census, down from 717 at the 2010 census. It is part of the Ottawa Micropolitan Statistical Area. Dalzell was founded on November 24, 1903 and certified on February 11, 1904.
Ladd is a village in Bureau County, Illinois, United States. The population was 1,236 at the 2020 census. It is part of the Ottawa Micropolitan Statistical Area. Ladd is perhaps most known for a Vietnam War tank located in the center of its park.
Spring Valley is a city situated on the Illinois River in Bureau County, Illinois, United States. The population was 5,582 at the 2020 census, up from 5,558 in 2010. It is part of the Ottawa Micropolitan Statistical Area.
Cedar Point is a village in LaSalle County, Illinois, United States. The population was 266 at the 2020 census, down from 277 at the 2010 census. It is part of the Ottawa Micropolitan Statistical Area. North of town was the Cedar Point Mine, which operated from 1906 to 1924.
LaSalle or La Salle is a city in LaSalle County, Illinois, United States, located at the intersection of Interstates 39 and 80. It is part of the Ottawa, IL Micropolitan Statistical Area. Originally platted in 1837 over one square mile, the city's boundaries have grown to 12 sq mi (31 km2). City boundaries extend from the Illinois River and Illinois and Michigan Canal to a mile north of Interstate 80 and from the city of Peru on the west to the village of North Utica on the east. Starved Rock State Park is located approximately 5 mi (8 km) to the east. The population was 9,582 as of the 2020 census, down from 9,609 at the 2010 census. LaSalle and its twin city, Peru, make up the core of the Illinois Valley. Due to their combined dominance of the zinc processing industry in the early 1900s, they were collectively nicknamed "Zinc City."
Oglesby is a city in LaSalle County, Illinois, United States. The population was 3,712 at the 2020 census, down from 3,791 at the 2010 census. It is part of the Ottawa Micropolitan Statistical Area.
Streator is a city in LaSalle and Livingston counties in the U.S. state of Illinois. The city is situated on the Vermilion River approximately 81 miles (130 km) southwest of Chicago in the prairie and farm land of north-central Illinois. As of the 2020 census, the population of Streator was 12,500.
Troy Grove is a village in LaSalle County, Illinois, United States. The population was 225 at the 2020 census, down from 250 at the 2010 census. It is part of the Ottawa, IL Micropolitan Statistical Area.
Wenona is a city in Marshall and LaSalle counties in the U.S. state of Illinois. The population was 974 at the 2020 census.
Harrisburg is a city in and the county seat of Saline County, Illinois, United States. It is located about 57 miles southwest of Evansville, Indiana, and 111 mi (179 km) southeast of St. Louis, Missouri. Its 2020 population was 8,219, and the surrounding Harrisburg Township had a population of 10,037, including the city residents. Harrisburg is included in the Illinois–Indiana–Kentucky tri-state area and is the principal city in the Harrisburg micropolitan statistical area with a combined population of 24,913.
The Chicago metropolitan area, also colloquially referred to as Chicagoland, is the metropolitan area containing the City of Chicago, which includes its surrounding suburbs and satellite cities. Encompassing 10,286 square mi (28,120 km2), the metropolitan area includes the city of Chicago, its suburbs and hinterland, that span 14 counties across northeast Illinois, northwest Indiana, and southeast Wisconsin. The MSA had a 2020 census population of 9,618,502 and the combined statistical area which spans up to 19 counties had a population of nearly 10 million people. The Chicago area is the fourth largest metropolitan area in North America, the third-largest metropolitan area in the United States, the largest within the entire Midwest, and the largest in the Great Lakes megalopolis. Its urban area is one of the forty largest in the world.
