THE BROWN COUNTY LAND BRIEF
Land in the
Western Dissected Illinoian Till Plain setting.
Brown County has 305.7 square miles of land in Illinois. 3 mapped landscape regions meet across Brown County: Western Dissected Illinoian Till Plain, River Hills, Upper Mississippi Alluvial Plain.
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.
Regional context: Interior River Valleys and Hills ↗ · Regional mapping across the county footprint
Where the landscape changes
Brown County intersects 3 mapped regional units. The largest mapped shares are:
- Western Dissected Illinoian Till Plain69.8%
- River Hills24.6%
- Upper Mississippi Alluvial Plain5.6%
Finding your parcel within Brown County
The atlas lists 13 cities, towns, townships, and Census communities associated with Brown County, including Cooperstown, Buckhorn, Lee. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Brown County by land and water
The Census records 1.6 square miles of water within Brown County, or 0.5% of its total area. That share is close to Brown County’s 0.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Brown County has 8.2 times the land area of nearby Mount Sterling township (37.2 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Adams County, Cass County, Morgan County, Pike County, Schuyler County within Illinois. A tract near one of these lines should be matched to the county identifier on its own records.