THE ADAIR LAND BRIEF
Land in the
Western Dissected Illinoian Till Plain setting.
Adair CDP has 0.43 square miles of land in McDonough County. Its Census reference point is in Western Dissected Illinoian Till Plain, within Interior River Valleys and Hills.
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 ↗ · Classification at the Census reference point
Adair and McDonough County
Adair is associated with McDonough County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Adair by land and water
The Census records 0 square miles of water within Adair, or 0% of its total area. It is 0.1 percentage points lower than the 0.1% recorded for McDonough County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Adair CDP has 1.2% of the land area of nearby New Salem township (36.2 square miles). These areas describe boundaries, not comparable property prices.

