The county of Williamson is located in Illinois and was founded in 1839. There are 66,357 residents in Williamson who have access to courthouses in Marion. 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 17,193 residents in Marion, which is 16.7 square miles. It was settled in August 21, 1839.