Douglas County is a county located in the U.S. state of Illinois. As of the 2020 United States Census, the population was 19,740. The county seat is Tuscola.
Douglas County Courthouse and veterans' memorial
The west face of the Douglas County courthouse
Tuscola is a city in Douglas County, Illinois, United States. The population was 4,636 at the 2020 census. It is the county seat of Douglas County.
Douglas County Courthouse in Tuscola
Tuscola, Illinois, post office