THE SHERMAN COUNTY LAND BRIEF
Land in the
Umatilla Plateau setting.
Sherman County has 823.6 square miles of land in Oregon. 3 mapped landscape regions meet across Sherman County: Umatilla Plateau, Deschutes/John Day Canyons, Pleistocene Lake Basins.
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
Sherman County intersects 3 mapped regional units. The largest mapped shares are:
- Umatilla Plateau73.9%
- Deschutes/John Day Canyons20.7%
- Pleistocene Lake Basins5.5%
Finding your parcel within Sherman County
The atlas lists 5 cities, towns, townships, and Census communities associated with Sherman County, including Rufus, Wasco, Biggs Junction. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Sherman County by land and water
The Census records 7.57 square miles of water within Sherman County, or 0.9% of its total area. That share is close to Sherman County’s 0.9%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Sherman County has 1,611.8 times the land area of nearby Grass Valley city (0.51 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Gilliam County, Wasco County within Oregon. A tract near one of these lines should be matched to the county identifier on its own records.

