THE ST. CLAIR COUNTY LAND BRIEF
Land in the
Osage/Gasconade Hills setting.
St. Clair County has 675 square miles of land in Missouri. 3 mapped landscape regions meet across St. Clair County: Osage/Gasconade Hills, Cherokee Plains, Springfield Plateau.
Wooded uplands over limestone, dolomite and sandstone characterize the Ozarks. Springs, caves and spring-fed streams are widespread regional features within a landscape of uneven plateaus and valleys.
Regional context: Ozark Highlands ↗ · Regional mapping across the county footprint
Where the landscape changes
St. Clair County intersects 3 mapped regional units. The largest mapped shares are:
- Osage/Gasconade Hills46.1%
- Cherokee Plains43.7%
- Springfield Plateau10.2%
Central Irregular Plains in St. Clair County
Irregular plains form a transition between northern agricultural country and more wooded uplands to the south and east. Grassland and forest historically mixed, with wider woodland belts beside streams.
Read the regional source ↗Finding your parcel within St. Clair County
The atlas lists 7 cities, towns, townships, and Census communities associated with St. Clair County, including Roscoe, Appleton City, Osceola. The list includes overlapping geography types and does not divide the county into exclusive service areas.
St. Clair County by land and water
The Census records 27.1 square miles of water within St. Clair County, or 3.9% of its total area. That share is close to St. Clair County’s 3.9%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, St. Clair County has 625.6 times the land area of nearby Osceola city (1.08 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bates County, Benton County, Cedar County, Henry County, Hickory County, Polk County, Vernon County within Missouri. A tract near one of these lines should be matched to the county identifier on its own records.

