Geographic reference
McDonough County, Illinois
McDonough County is a county or county-equivalent in Illinois.
Reference details
- State
- Illinois (IL)
- Census GEOID
- 17109
- Land area
- 1,526.292 km²
- Water area
- 2.06 km²
- Representative point
- 40.455808, -90.678954
View point on map ↗
Geographic facts: 2026 U.S. Census Gazetteer. Coordinates identify a representative point, not the full geographic boundary.