Search results
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 a city and the county seat of St. Clair County, Illinois, United States. The population was 42,404 at the 2020 census, making it the most populated city in the Metro East region of Greater St. Louis, and in all of Southern Illinois.
Jul 1, 2022 · St. Clair County, Illinois. QuickFacts provides statistics for all states and counties, and for cities and towns with a population of 5,000 or more.
In 2022, St. Clair County, IL had a population of 257k people with a median age of 39.4 and a median household income of $68,915. Between 2021 and 2022 the population of St. Clair County, IL declined from 258,597 to 256,791, a −0.698% decrease and its median household income grew from $63,017 to $68,915, a 9.36% increase.
St. Clair County is the oldest county in the U.S. state of Illinois. According to the 2020 census, it had a population of 257,400, making it the ninth-most populous county in Illinois. Its county seat is Belleville. The county was founded in 1790, before the establishment of Illinois as a state. References
St. Clair County, Illinois's estimated 2024 population is 249,771 with a growth rate of -0.5% in the past year according to the most recent United States census data. St. Clair County, Illinois is the 9th largest county in Illinois .
People also ask
Where is St Clair County Illinois?
What is the population of St Clair County IL in 2022?
How many people live in St Clair County IL?
Which census tract in St Clair County IL has the highest income?
Mar 14, 2024 · Population estimates are updated annually using current data on births, deaths, and migration to calculate population change since the most recent decennial census. The annual time series of estimates begins with the most recent decennial census data and extends to the vintage year.
