Jonesboro (/ˈdʒoʊnzbʌrə/) is a city in Union County, Illinois, United States.

[3] The city is known for being tied to its close neighbor Anna, together known as Anna-Jonesboro.

Jonesboro was named for Doctor Jones, a pioneer settler.

There were 792 housing units at an average density of 413.7 per square mile (159.7/km2).

30.8% of all households were made up of individuals, and 17.6% had someone living alone who was 65 years of age or older.