THE HENRY COUNTY LAND BRIEF
Land in the
Illinois/Indiana Prairies setting.
Henry County has 823.2 square miles of land in Illinois. 5 mapped landscape regions meet across Henry County: Illinois/Indiana Prairies, Sand Area, Upper Mississippi Alluvial Plain, among others.
Glaciated plains historically supported tallgrass prairie mixed with oak and hickory woodland. Dark prairie soils and broad farming landscapes distinguish much of the Central Corn Belt.
Regional context: Central Corn Belt Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Henry County intersects 5 mapped regional units. The largest mapped shares are:
- Illinois/Indiana Prairies68.7%
- Sand Area25.7%
- Upper Mississippi Alluvial Plain2.4%
- Western Dissected Illinoian Till Plain1.7%
- River Hills1.5%
Interior River Valleys and Hills in Henry County
Broad terraced river valleys contrast with wooded slopes and dissected glacial plains. Bottomland settings and upland oak landscapes occur close together across the Interior River Valleys and Hills.
Read the regional source ↗Finding your parcel within Henry County
The atlas lists 43 cities, towns, townships, and Census communities associated with Henry County, including Cambridge, Andover, Osco. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Henry County by land and water
The Census records 2.5 square miles of water within Henry County, or 0.3% of its total area. That share is close to Henry County’s 0.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Henry County has 22.9 times the land area of nearby Munson township (35.9 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bureau County, Knox County, Mercer County, Rock Island County, Stark County, Whiteside County within Illinois. A tract near one of these lines should be matched to the county identifier on its own records.

