Geographic reference
Madison County, Illinois
Madison County is a county or county-equivalent in Illinois.
Reference details
- State
- Illinois (IL)
- Census GEOID
- 17119
- Land area
- 1,853.192 km²
- Water area
- 63.157 km²
- Representative point
- 38.82712, -89.900227
View point on map ↗
Geographic facts: 2026 U.S. Census Gazetteer. Coordinates identify a representative point, not the full geographic boundary.