THE PROSSER LAND BRIEF
Land in the
Pleistocene Lake Basins setting.
Prosser city has 5.17 square miles of land in Benton County. Its Census reference point is in Pleistocene Lake Basins, within Columbia Plateau.
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 ↗ · Classification at the Census reference point
Prosser and Benton County
Prosser is associated with Benton County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
Prosser by land and water
The Census records 0.13 square miles of water within Prosser, or 2.4% of its total area. It is 1 percentage points lower than the 3.4% recorded for Benton County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Prosser city has 75.9% of the land area of nearby Grandview city (6.81 square miles). These areas describe boundaries, not comparable property prices.

