Toulon is a city in Stark County, Illinois, United States. The population was 1,400 at the 2000 census. It is the county seat of Stark County. Toulon is part of the Peoria-Pekin MSA, and is the northwestern terminus of the Rock Island Trail State Park. Toulon apartments for rent comparison page shows most up to date rent information on Toulon apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.