THE FRANKLIN COUNTY LAND BRIEF
Land in the
Pleistocene Lake Basins setting.
Franklin County has 1,241.6 square miles of land in Washington. 4 mapped landscape regions meet across Franklin County: Pleistocene Lake Basins, Loess Islands, Channeled Scablands, 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
Franklin County intersects 4 mapped regional units. The largest mapped shares are:
- Pleistocene Lake Basins58.6%
- Loess Islands31.4%
- Channeled Scablands8.7%
- Yakima Folds1.3%
Finding your parcel within Franklin County
The atlas lists 6 cities, towns, townships, and Census communities associated with Franklin County, including Pasco, Connell, Basin City. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Franklin County by land and water
The Census records 23.4 square miles of water within Franklin County, or 1.8% of its total area. That share is close to Franklin County’s 1.8%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Franklin County has 749.3 times the land area of nearby Mesa city (1.66 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Adams County, Benton County, Columbia County, Grant County, Walla Walla County, Whitman County within Washington. A tract near one of these lines should be matched to the county identifier on its own records.

