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3 days ago · These are the people who service the homeowners and residents of St. Clair County and the County has multiple resources to help. Maps, assessment information, codes & regulations, and more can be found here.
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.
Use the tools on this page to find useful information about St. Clair County. The Parcel Inquiry will allow you to access information directly from the Assessor's and Treasurer's parcel database. You can get data on parcel assessments, taxes, and ownership.
Located in the heart of the Midwest, St. Clair County boasts a rich history and a diverse community. Our county is home to a variety of thriving industries, including healthcare, manufacturing, and transportation.
County Office Address #10 Public Square Belleville, IL 62220 Contact Info. (618) 277-6600. webmaster@co.st-clair.il.us
Belleville is a city in and the county seat of St. Clair County, Illinois, United States. [3] 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.
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.
Since 1905, the St. Clair County Historical Society has been helping St. Clair County to tell its story. We teach by using our museums, historic artifacts, historic sites, STCCHS publications and our research library
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 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] The county was founded in 1790, before the establishment of Illinois as a state.
