Geographic reference
Marion County, Illinois
Marion County is a county or county-equivalent in Illinois.
Reference details
- State
- Illinois (IL)
- Census GEOID
- 17121
- Land area
- 1,482.867 km²
- Water area
- 9.233 km²
- Representative point
- 38.648331, -88.920446
View point on map ↗
Geographic facts: 2026 U.S. Census Gazetteer. Coordinates identify a representative point, not the full geographic boundary.