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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.
Apr 30, 2024 · Guide to St. Clair County, Illinois ancestry, genealogy and family history, birth records, marriage records, death records, census records, family history, and military records.
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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.
Lebanon is a city in St. Clair County, Illinois, United States. The population was 4,691 at the 2020 census It is a part of the Metro East region of the Greater St. Louis metropolitan area. Lebanon is home to McKendree University, the oldest college in Illinois. Registered historic places. Lebanon, 1938. Emerald Mound and Village Site.
Jul 1, 2023 · St. Clair County, Illinois; United States. QuickFacts provides statistics for all states and counties. Also for cities and towns with a population of 5,000 or more.
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St. Clair County, Illinois has 657.7 square miles of land area and is the 28th largest county in Illinois by total area. St. Clair County, Illinois is bordered by St. Louis County, Missouri, Randolph County, Illinois, Clinton County, Illinois, Monroe County, Illinois, St. Louis city, Missouri, Washington County, Illinois, and Madison County ...
Website. www .co .st-clair .il .us. 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, [1] making it the ninth-most populous county in Illinois. Its county seat is Belleville. [2]
