The county of Union is located in Illinois and was founded in 1818. There are 17,808 residents in Union who have access to courthouses in Jonesboro. 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 1,821 residents in Jonesboro, which is 2.7 square miles.