The county of Rock Island is located in Illinois and was founded in 1831. There are 147,546 residents in Rock Island who have access to courthouses in Rock Island. 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 39,018 residents in Rock Island, which is 17.1 square miles. It was settled in 1841.