THE HILLSBORO LAND BRIEF
Land in the
Prairie Terraces setting.
Hillsboro city has 26.4 square miles of land in Washington County. Its Census reference point is in Prairie Terraces, within Willamette Valley.
The Willamette River's floodplains and terraces sit among low hills and scattered buttes. The valley's prairie, oak and riparian landscape differs markedly from the conifer-covered mountains around it.
Regional context: Willamette Valley ↗ · Classification at the Census reference point
Hillsboro and Washington County
Hillsboro is associated with Washington 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.
Hillsboro by land and water
The Census records 0.01 square miles of water within Hillsboro, or 0% of its total area. It is 0.3 percentage points lower than the 0.3% recorded for Washington County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Hillsboro city has 13.5 times the land area of nearby Rockcreek CDP (1.97 square miles). These areas describe boundaries, not comparable property prices.

