THE MARION LAND BRIEF
Land in the
Southern Illinoian Till Plain setting.
Marion city has 14.4 square miles of land in Williamson 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
Marion and Williamson County
Marion is associated with Williamson 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.
Marion by land and water
The Census records 0.22 square miles of water within Marion, or 1.5% of its total area. It is 4 percentage points lower than the 5.4% recorded for Williamson County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Marion city has 27.1 times the land area of nearby Spillertown village (0.53 square miles). These areas describe boundaries, not comparable property prices.

