THE ST. CLAIR COUNTY LAND BRIEF
Land in the
Southern Limestone/Dolomite Valleys and Low Rolling Hills setting.
St. Clair County has 631.6 square miles of land in Alabama. 4 mapped landscape regions meet across St. Clair County: Southern Limestone/Dolomite Valleys and Low Rolling Hills, Southern Sandstone Ridges, Southern Shale Valleys, among others.
Long, roughly parallel ridges and valleys follow folded and faulted rock layers. Limestone valleys, sandstone ridges and other geologic contrasts produce varied terrain and numerous regional springs and caves.
Regional context: Ridge and Valley ↗ · Regional mapping across the county footprint
Where the landscape changes
St. Clair County intersects 4 mapped regional units. The largest mapped shares are:
- Southern Limestone/Dolomite Valleys and Low Rolling Hills35.1%
- Southern Sandstone Ridges30.3%
- Southern Shale Valleys29.1%
- Southern Table Plateaus5.5%
Southwestern Appalachians in St. Clair County
Open low mountains and plateau edges form a landscape of wooded uplands and deeper ravines. Escarpments mark the transition toward both the Ridge and Valley and the Interior Plateau.
Read the regional source ↗Finding your parcel within St. Clair County
The atlas lists 14 cities, towns, townships, and Census communities associated with St. Clair County, including Trussville, Pell City, Moody. 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 21.7 square miles of water within St. Clair County, or 3.3% of its total area. That share is close to St. Clair County’s 3.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, St. Clair County has 45.2 times the land area of nearby Odenville city (14 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Blount County, Calhoun County, Etowah County, Jefferson County, Shelby County, Talladega County within Alabama. A tract near one of these lines should be matched to the county identifier on its own records.

