THE TRINITY COUNTY LAND BRIEF
Land in the
Southern Tertiary Uplands setting.
Trinity County has 693.9 square miles of land in Texas. 2 mapped landscape regions meet across Trinity County: Southern Tertiary Uplands, Floodplains and Low Terraces.
The Piney Woods occupy irregular plains at the western edge of the southern forest belt. Pine and hardwood landscapes alternate with wider river corridors such as the Red River valley.
Regional context: South Central Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Trinity County intersects 2 mapped regional units. The largest mapped shares are:
- Southern Tertiary Uplands95.6%
- Floodplains and Low Terraces4.4%
Finding your parcel within Trinity County
The atlas lists 3 cities, towns, townships, and Census communities associated with Trinity County, including Trinity, Westwood Shores, Groveton. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Trinity County by land and water
The Census records 20.1 square miles of water within Trinity County, or 2.8% of its total area. That share is close to Trinity County’s 2.8%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Trinity County has 268.6 times the land area of nearby Groveton city (2.58 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Angelina County, Houston County, Polk County, San Jacinto County, Walker County within Texas. A tract near one of these lines should be matched to the county identifier on its own records.

