Jersey County, county in Illinois, United States. As of 2020 county had an estimated population of 21,616 inhabitants. The county was created 183 years ago in 1839. Its county seat is "Jerseyville".
There are 8 city/town in Jersey County, IL. The largest city of Jersey County is Jerseyville with a population of 8,111. Other cities include, Grafton population 691, Elsah population 604, Rosedale population 425, Fieldon population 219
Cities, Towns, Neighborhoods & Other Populated Places in Jersey County.
|Camden||Village in Illinois, United States||Jersey||76|
|Elsah||Township in Jersey County, Illinois||Jersey||604|
|Fidelity||Human settlement in Illinois, United States of America||Jersey||113|
|Fieldon||Human settlement in Illinois, United States of America||Jersey||219|
|Grafton||Town in Illinois, United States||Jersey||691|
|Jerseyville||City in Jersey County, Illinois, United States||Jersey||8,111|
|Otterville||Town of the United States||Jersey||116|
|Rosedale||Unincorporated community in Illinois, United States||Jersey||425|