Geographic reference
Mercer County, Illinois
Mercer County is a county or county-equivalent in Illinois.
Reference details
- State
- Illinois (IL)
- Census GEOID
- 17131
- Land area
- 1,453.604 km²
- Water area
- 19.412 km²
- Representative point
- 41.205605, -90.74177
View point on map ↗
Geographic facts: 2026 U.S. Census Gazetteer. Coordinates identify a representative point, not the full geographic boundary.