THE COLLINSVILLE LAND BRIEF
Land in the
River Hills setting.
Collinsville city has 15.4 square miles of land in Madison County, St. Clair County. Its Census reference point is in River Hills, 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
One place name. 2 county geographies.
Collinsville intersects 2 county geographies: Madison County, St. Clair County. A Collinsville mailing address alone cannot choose the right record office; use the county and parcel identifier on the tax bill or deed.
Collinsville by land and water
The Census records 0.19 square miles of water within Collinsville, or 1.2% of its total area. It is 3 percentage points lower than the 4.1% recorded for Illinois. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Collinsville city has 44.3% of the land area of nearby Collinsville township (34.9 square miles). These areas describe boundaries, not comparable property prices.

