Whiteside County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 55,691. 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.
St. Clair County is the ninth most populous county in Illinois. Located directly east of St. Louis, the county is part of the Metro East region of the Greater St. Louis metropolitan area in southern Illinois. As of the 2020 United States census, St. Clair County had a population of 257,400, making it the third most populous county in Illinois outside the Chicago metropolitan area. Belleville is the county’s seat and largest city. Cahokia Village was founded in 1697 by French settlers and served as a Jesuit mission to convert tribes of the Illinois Confederation to Christianity. Prior to the establishment of Illinois as a state, the government of the Northwest Territory created St. Clair County in 1790 out of the western half of Knox County. In 1809, the county became the administrative center of the Illinois Territory and one of the two original counties of Illinois, alongside Randolph County. In 1970, the United States Census Bureau placed the mean center of U.S. population in St. Clair County.
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.
Lee County is a county located in the U.S. state of Illinois. According to the 2020 census, it has a population of 34,145. Its county seat is Dixon. The Dixon, IL Micropolitan Statistical Area includes all of Lee County.
Jo Daviess County is the northwesternmost county in the U.S. state of Illinois. According to the 2020 census, it had a population of 22,035. Its county seat is Galena. Jo Daviess County is part of the Tri-State Area and is located near Dubuque, Iowa and Platteville, Wisconsin. As part of the Driftless Area, Jo Daviess County contains rugged terrain compared to the rest of the state. Within Jo Daviess County lies Charles Mound, the highest natural point in Illinois, as well as eight of the ten highest points in Illinois.
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.
Brown County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 6,244. Its county seat is Mount Sterling.
Mount Sterling is a city in and the county seat of Brown County, Illinois, United States. The population was 2,006 at the 2020 census.
Forest View is a village in Cook County, Illinois, United States. Per the 2020 census, the population was 792. It is primarily an industrial corridor adjacent to the Chicago neighborhood of Garfield Ridge, which is on the village's southern border.
Albany is a village in Whiteside County, Illinois, United States. The population was 891 at the 2010 census, down from 895 in 2000.
Coleta is a village in Whiteside County, Illinois, United States. The population was 164 at the 2010 census, up from 155 in 2000.
Fulton is a city in Whiteside County, Illinois, United States. The population was 3,481 at the 2010 census, down from 3,881 in 2000. Fulton is located across the Mississippi River from Clinton, Iowa.
Lyndon is a village in Whiteside County, Illinois, United States. The population was 648 at the 2010 census, up from 566 in 2000.
Morrison is a city and the county seat of Whiteside County, Illinois, United States. The population was 4,188 at the 2010 census, down from 4,447 in 2000. It is located on the Historic Lincoln Highway, the nation's first transcontinental highway and in Morrison was the site of two concrete "seedling miles", which served as prototypes of what an improved highway could do for the nation.
Prophetstown is a city in Whiteside County, Illinois, United States. The population was 2,080 at the 2010 census, up from 2,023 in 2000.
Rock Falls is a city in Whiteside County, Illinois, United States. The recorded population was 8,606 at the 2020 census, down 7.12% from 9,266 in 2010. The city is located on the Rock River, directly opposite its twin city of Sterling.
Sterling is a city in Whiteside County, Illinois, United States, along the Rock River. The population was 14,782 at the 2020 census, down from 15,370 in 2010. Formerly nicknamed "Hardware Capital of the World", the city has long been associated with manufacturing and the steel industry.
Tampico is a village located in Tampico Township, Whiteside County, Illinois, United States next to Rock Falls and Sterling, Illinois. As of the 2010 census the village had a total population of 790, up from 772 at the 2000 census. It is known as the birthplace of Ronald Reagan, the 40th President of the United States.
Sterling High School is a high school, located at 1608 Fourth Ave in Sterling, Illinois. It is the high school within Sterling Community Unit District 5.
Galt is an unincorporated community in Whiteside County, Illinois, United States. Galt is 3 miles (4.8 km) west of Sterling and has a post office with ZIP code 61037.
