THE CAHOKIA HEIGHTS LAND BRIEF
Land in the
Middle Mississippi Alluvial Plain setting.
Cahokia Heights city has 15.8 square miles of land in St. Clair County. Its Census reference point is in Middle Mississippi Alluvial 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
Cahokia Heights and St. Clair County
Cahokia Heights is associated with St. Clair 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.
Cahokia Heights by land and water
The Census records 0.65 square miles of water within Cahokia Heights, or 3.9% of its total area. It is 1.6 percentage points higher than the 2.4% recorded for St. Clair County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Cahokia Heights city has 56.5% of the land area of nearby Centreville township (27.9 square miles). These areas describe boundaries, not comparable property prices.

