Marion County, Illinois
Marion County is a county in Illinois with an estimated population of 36,673 in 2023. 10 cities, towns and Census places in it are indexed here.
Largest places in Marion County
Centralia 11,848Salem 7,056Sandoval 1,127Central City 1,076Odin 910Kinmundy 716Junction City 520Patoka 508Iuka 494Alma 305
About Marion County
Marion County is one of the counties of Illinois. County governments in Illinois handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.