THE WASHINGTON COUNTY LAND BRIEF
Land in the
Osage Cuestas setting.
Washington County has 415.5 square miles of land in Oklahoma. 2 mapped landscape regions meet across Washington County: Osage Cuestas, Northern Cross Timbers.
Irregular plains form a transition between northern agricultural country and more wooded uplands to the south and east. Grassland and forest historically mixed, with wider woodland belts beside streams.
Regional context: Central Irregular Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Washington County intersects 2 mapped regional units. The largest mapped shares are:
- Osage Cuestas92%
- Northern Cross Timbers8%
Cross Timbers in Washington County
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.
Read the regional source ↗Finding your parcel within Washington County
The atlas lists 6 cities, towns, townships, and Census communities associated with Washington County, including Bartlesville, Dewey, Copan. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Washington County by land and water
The Census records 8.83 square miles of water within Washington County, or 2.1% of its total area. That share is close to Washington County’s 2.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Washington County has 18.4 times the land area of nearby Bartlesville city (22.6 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Nowata County, Osage County, Rogers County, Tulsa County within Oklahoma. A tract near one of these lines should be matched to the county identifier on its own records.