THE CALDWELL COUNTY LAND BRIEF
Land in the
Southern Post Oak Savanna setting.
Caldwell County has 544.5 square miles of land in Texas. 2 mapped landscape regions meet across Caldwell County: Southern Post Oak Savanna, Northern Blackland Prairie.
The Post Oak Savanna's irregular plains form a transition between open prairie and the Piney Woods. Post oak, grassland and locally dense clay subsoils are characteristic regional elements.
Regional context: East Central Texas Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Caldwell County intersects 2 mapped regional units. The largest mapped shares are:
- Southern Post Oak Savanna53.7%
- Northern Blackland Prairie46.3%
Texas Blackland Prairies in Caldwell County
Fine-textured clay soils distinguish the Blackland Prairie landscape from surrounding Texas regions. Its historic prairie setting now includes a mixture of agricultural areas and expanding developed corridors.
Read the regional source ↗Finding your parcel within Caldwell County
The atlas lists 7 cities, towns, townships, and Census communities associated with Caldwell County, including San Marcos, Lockhart, Luling. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Caldwell County by land and water
The Census records 1.91 square miles of water within Caldwell County, or 0.3% of its total area. That share is close to Caldwell County’s 0.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Caldwell County has 33.4 times the land area of nearby Lockhart city (16.3 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bastrop County, Fayette County, Gonzales County, Guadalupe County, Hays County, Travis County within Texas. A tract near one of these lines should be matched to the county identifier on its own records.

