THE MENARD COUNTY LAND BRIEF
Land in the
Illinois/Indiana Prairies setting.
Menard County has 314.4 square miles of land in Illinois. 3 mapped landscape regions meet across Menard County: Illinois/Indiana Prairies, River Hills, Upper Mississippi Alluvial Plain.
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
Menard County intersects 3 mapped regional units. The largest mapped shares are:
- Illinois/Indiana Prairies87.7%
- River Hills9.4%
- Upper Mississippi Alluvial Plain2.9%
Interior River Valleys and Hills in Menard 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 Menard County
The atlas lists 6 cities, towns, townships, and Census communities associated with Menard County, including Lake Petersburg, Athens, Petersburg. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Menard County by land and water
The Census records 1.02 square miles of water within Menard County, or 0.3% of its total area. That share is close to Menard County’s 0.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Menard County has 201.3 times the land area of nearby Petersburg city (1.56 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Cass County, Logan County, Mason County, Sangamon County within Illinois. A tract near one of these lines should be matched to the county identifier on its own records.

