Founded in 1841, Henderson County is one of 102 counties in the state of Illinois. Historically, Henderson County was formed from Warren County. The city of Oquawka is the county seat. With FIPS code of 71, Henderson County has a population of 6,312 and area of 378 square miles (979 km2).
List of all cities in Henderson County, IL alphabetically
|City/Town||Postal Code||Area Code|
|Carthage Lake, IL||61425||309|