THE TONTI LAND BRIEF
Land in the
Southern Illinoian Till Plain setting.
Tonti township has 35.5 square miles of land in Marion 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
Tonti and Marion County
Tonti is associated with Marion 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.
Tonti by land and water
The Census records 0.1 square miles of water within Tonti, or 0.3% of its total area. It is 0.3 percentage points lower than the 0.6% recorded for Marion County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Tonti township has 31.3 times the land area of nearby Alma village (1.13 square miles). These areas describe boundaries, not comparable property prices.

