Geographic reference
Illinois Geographic Directory
Explore counties, cities, towns and ZIP-code records for Illinois.
Reference details
- State
- Illinois (IL)
- Census GEOID
- 17
- Land area
- 143,779.392 km²
- Water area
- 6,215.329 km²
- Representative point
- 40.102875, -89.152611
View point on map ↗
Geographic facts: 2026 U.S. Census Gazetteer. Coordinates identify a representative point, not the full geographic boundary.