Geographic reference
McHenry County, Illinois
McHenry County is a county or county-equivalent in Illinois.
Reference details
- State
- Illinois (IL)
- Census GEOID
- 17111
- Land area
- 1,562.806 km²
- Water area
- 19.856 km²
- Representative point
- 42.324298, -88.452245
View point on map ↗
Geographic facts: 2026 U.S. Census Gazetteer. Coordinates identify a representative point, not the full geographic boundary.