THE JOHNSON COUNTY LAND BRIEF
Land in the
Eastern Cross Timbers setting.
Johnson County has 725.1 square miles of land in Texas. 3 mapped landscape regions meet across Johnson County: Eastern Cross Timbers, Grand Prairie, Northern Blackland Prairie.
The Cross Timbers mark a transition from prairie to more wooded eastern landscapes. Native grassland is interspersed with post oak and blackjack oak, creating a woodland-and-open-country mosaic.
Regional context: Cross Timbers ↗ · Regional mapping across the county footprint
Where the landscape changes
Johnson County intersects 3 mapped regional units. The largest mapped shares are:
- Eastern Cross Timbers42.2%
- Grand Prairie38.9%
- Northern Blackland Prairie18.9%
Texas Blackland Prairies in Johnson 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 Johnson County
The atlas lists 19 cities, towns, townships, and Census communities associated with Johnson County, including Fort Worth, Grand Prairie, Mansfield. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Johnson County by land and water
The Census records 9.18 square miles of water within Johnson County, or 1.3% of its total area. That share is close to Johnson County’s 1.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Johnson County has 138 times the land area of nearby Keene city (5.26 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Bosque County, Ellis County, Hill County, Hood County, Parker County, Somervell County, Tarrant County within Texas. A tract near one of these lines should be matched to the county identifier on its own records.

