The county of St. Clair is located in Illinois and was founded in 1790. There are 270,056 residents in St. Clair who have access to courthouses in Belleville. In general, each county has a full set of courts, from traffic court to superior and appellate court; supreme courts are usually located in the state capital. Illinois is part of the 7th federal circuit court as well.
There are 0 residents in Belleville, which is 23.5 square miles and 515ft above sea level. It was settled in 1814 and is governed by a local government.