THE MOUNT VERNON LAND BRIEF
Land in the
Southern Illinoian Till Plain setting.
Mount Vernon township has 37 square miles of land in Jefferson County. Its Census reference point is in Southern 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
Mount Vernon and Jefferson County
Mount Vernon is associated with Jefferson 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.
Mount Vernon by land and water
The Census records 0.26 square miles of water within Mount Vernon, or 0.7% of its total area. It is 1.4 percentage points lower than the 2.2% recorded for Jefferson County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Mount Vernon township has 2.5 times the land area of nearby Mount Vernon city (14.7 square miles). These areas describe boundaries, not comparable property prices.

