THE AFFTON LAND BRIEF
Land in the
River Hills setting.
Affton CDP has 4.57 square miles of land in St. Louis 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
Affton and St. Louis County
Affton is associated with St. Louis 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.
Affton by land and water
The Census records 0 square miles of water within Affton, or 0% of its total area. It is 2.9 percentage points lower than the 2.9% recorded for St. Louis County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Affton CDP has 20.4 times the land area of nearby Lakeshire city (0.22 square miles). These areas describe boundaries, not comparable property prices.

