Mason County, county in Illinois, United States. As of 2020 county had an estimated population of 13,173 inhabitants. The county was created 183 years ago in 1841. Its county seat is Havana.
There are 1 city/town in Mason County, IL. The largest city of Mason County is Forest City with a population of 249.
List of cities, towns, neighborhoods & other populated places in Mason County.
City Name | Title | Population |
---|---|---|
Forest City | Township in Mason County, Illinois | 249 |