Chester is a city in and the county seat of Randolph County, Illinois, United States, on a bluff above the Mississippi River. The population was 7,640 at the 2020 census. It lies 61 miles (98 km) south of St. Louis, Missouri.
Randolph County Courthouse
Randolph County, Illinois
Randolph County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 30,163. Its county seat is Chester.
Randolph County Courthouse in Chester