Greene County, Illinois

Greene County is a county in Illinois with an estimated population of 11,543 in 2023. 5 cities, towns and Census places in it are indexed here.

Largest places in Greene County

About Greene County

Greene 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.