THE MACOUPIN COUNTY LAND BRIEF
Land in the
Western Dissected Illinoian Till Plain setting.
Macoupin County has 863 square miles of land in Illinois. 3 mapped landscape regions meet across Macoupin County: Western Dissected Illinoian Till Plain, 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
Macoupin County intersects 3 mapped regional units. The largest mapped shares are:
- Western Dissected Illinoian Till Plain72%
- Southern Illinoian Till Plain19.6%
- Illinois/Indiana Prairies8.4%
Central Corn Belt Plains in Macoupin 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 Macoupin County
The atlas lists 53 cities, towns, townships, and Census communities associated with Macoupin County, including Honey Point, Scottville, Barr. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Macoupin County by land and water
The Census records 4.71 square miles of water within Macoupin County, or 0.5% of its total area. That share is close to Macoupin County’s 0.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Macoupin County has 256.2 times the land area of nearby Carlinville city (3.37 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Greene County, Jersey County, Madison County, Montgomery County, Morgan County, Sangamon County within Illinois. A tract near one of these lines should be matched to the county identifier on its own records.

