Geographic reference
Union County, Illinois
Union County is a county or county-equivalent in Illinois.
Reference details
- State
- Illinois (IL)
- Census GEOID
- 17181
- Land area
- 1,070.733 km²
- Water area
- 22.539 km²
- Representative point
- 37.485652, -89.244639
View point on map ↗
Geographic facts: 2026 U.S. Census Gazetteer. Coordinates identify a representative point, not the full geographic boundary.