THE MCDONOUGH COUNTY LAND BRIEF
Land in the
Western Dissected Illinoian Till Plain setting.
McDonough County has 589.3 square miles of land in Illinois. The mapped landscape region in McDonough County is Western Dissected Illinoian Till 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
Finding your parcel within McDonough County
The atlas lists 30 cities, towns, townships, and Census communities associated with McDonough County, including Hire, Sciota, Blandinsville. The list includes overlapping geography types and does not divide the county into exclusive service areas.
McDonough County by land and water
The Census records 0.8 square miles of water within McDonough County, or 0.1% of its total area. That share is close to McDonough County’s 0.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, McDonough County has 54.4 times the land area of nearby Macomb city (10.8 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Fulton County, Hancock County, Henderson County, Schuyler County, Warren County within Illinois. A tract near one of these lines should be matched to the county identifier on its own records.

