Union County, Illinois

Union County
Union County Courthouse in Jonesboro
Map of Illinois highlighting Union County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Coordinates: 37°28′N 89°16′W / 37.47°N 89.26°W / 37.47; -89.26
Country United States
State Illinois
FoundedJanuary 2, 1818
SeatJonesboro
Largest cityAnna
Area
 • Total422 sq mi (1,090 km2)
 • Land413 sq mi (1,070 km2)
 • Water8.7 sq mi (23 km2)  2.1%
Population
 (2020)
 • Total17,244
 • Density41/sq mi (16/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district12th
Websitewww.unioncountyil.gov

Union County is a county located in the U.S. state of Illinois. According to the 2020 United States Census, it had a population of 17,244.[1] Its county seat is Jonesboro.[2] It is located in the southern portion of Illinois known locally as "Little Egypt".

  1. ^ "State & County QuickFacts". US Census Bureau.
  2. ^ "Find a County". National Association of Counties. Archived from the original on May 3, 2015. Retrieved June 7, 2011.