THE SHELBY COUNTY LAND BRIEF
Land in the
Southern Illinoian Till Plain setting.
Shelby County has 758.5 square miles of land in Illinois. 2 mapped landscape regions meet across Shelby County: Southern Illinoian Till Plain, Illinois/Indiana Prairies.
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
Shelby County intersects 2 mapped regional units. The largest mapped shares are:
- Southern Illinoian Till Plain50.3%
- Illinois/Indiana Prairies49.7%
Central Corn Belt Plains in Shelby County
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.
Read the regional source ↗Finding your parcel within Shelby County
The atlas lists 38 cities, towns, townships, and Census communities associated with Shelby County, including Oconee, Prairie, Ash Grove. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Shelby County by land and water
The Census records 9.56 square miles of water within Shelby County, or 1.2% of its total area. That share is close to Shelby County’s 1.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Shelby County has 182 times the land area of nearby Shelbyville city (4.17 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Christian County, Coles County, Cumberland County, Effingham County, Fayette County, Macon County, Montgomery County, Moultrie County within Illinois. A tract near one of these lines should be matched to the county identifier on its own records.

