Chester, IL Insights: Population,
Zip Codes, Influence, and Service Areas

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.

Zip Codes in Chester, IL that we also serve: 62233 62259





Cities Close To Chester, IL That We Also Serve