THE WALLA WALLA COUNTY LAND BRIEF
Land in the
Loess Islands setting.
Walla Walla County has 1,270 square miles of land in Washington. 7 mapped landscape regions meet across Walla Walla County: Loess Islands, Pleistocene Lake Basins, Deep Loess Foothills, among others.
Basalt underlies this dry plateau of grassland and sagebrush. Windblown soils cover some uplands, while ancient flood paths exposed rock across the region's scabland terrain.
Regional context: Columbia Plateau ↗ · Regional mapping across the county footprint
Where the landscape changes
Walla Walla County intersects 7 mapped regional units. The largest mapped shares are:
- Loess Islands46.4%
- Pleistocene Lake Basins35.1%
- Deep Loess Foothills10.3%
- Channeled Scablands3.2%
- Maritime-Influenced Zone3%
Blue Mountains in Walla Walla County
The Blue Mountains combine open mountain ranges and dissected volcanic uplands. The Wallowa and Elkhorn high country includes older granitic and metamorphic rocks above the surrounding lava landscape.
Read the regional source ↗Finding your parcel within Walla Walla County
The atlas lists 10 cities, towns, townships, and Census communities associated with Walla Walla County, including Walla Walla, Burbank, College Place. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Walla Walla County by land and water
The Census records 28.9 square miles of water within Walla Walla County, or 2.2% of its total area. That share is close to Walla Walla County’s 2.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Walla Walla County has 3,183 times the land area of nearby Prescott city (0.4 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Benton County, Columbia County, Franklin County within Washington. A tract near one of these lines should be matched to the county identifier on its own records.

