Geographic reference
Montgomery County, Illinois
Montgomery County is a county or county-equivalent in Illinois.
Reference details
- State
- Illinois (IL)
- Census GEOID
- 17135
- Land area
- 1,822.745 km²
- Water area
- 15.472 km²
- Representative point
- 39.228068, -89.478141
View point on map ↗
Geographic facts: 2026 U.S. Census Gazetteer. Coordinates identify a representative point, not the full geographic boundary.