Jersey County, county in Illinois, United States. As of 2020 county had an estimated population of 21,616 inhabitants. The county was created 185 years ago in 1839. Its county seat is Jerseyville.
There are 1 city/town in Jersey County, IL. The largest city of Jersey County is Jerseyville with a population of 8,111.
List of cities, towns, neighborhoods & other populated places in Jersey County.
City Name | Title | Population |
---|---|---|
Jerseyville | City in Jersey County, Illinois, United States | 8,111 |