THE JOHNSTON COUNTY LAND BRIEF
Land in the
Arbuckle Uplift setting.
Johnston County has 643.1 square miles of land in Oklahoma. 3 mapped landscape regions meet across Johnston County: Arbuckle Uplift, Eastern Cross Timbers, Cretaceous Dissected Uplands.
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
Johnston County intersects 3 mapped regional units. The largest mapped shares are:
- Arbuckle Uplift65.4%
- Eastern Cross Timbers27.8%
- Cretaceous Dissected Uplands6.8%
South Central Plains in Johnston County
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.
Read the regional source ↗Finding your parcel within Johnston County
The atlas lists 14 cities, towns, townships, and Census communities associated with Johnston County, including Tishomingo, Coleman, Mannsville. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Johnston County by land and water
The Census records 15.3 square miles of water within Johnston County, or 2.3% of its total area. That share is close to Johnston County’s 2.3%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Johnston County has 724.2 times the land area of nearby Reagan CDP (0.89 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Atoka County, Bryan County, Carter County, Coal County, Marshall County, Murray County, Pontotoc County within Oklahoma. A tract near one of these lines should be matched to the county identifier on its own records.

