THE DEER ISLAND LAND BRIEF
Land in the
Portland/Vancouver Basin setting.
Deer Island CDP has 0.49 square miles of land in Columbia County. Its Census reference point is in Portland/Vancouver Basin, 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
Deer Island and Columbia County
Deer Island is associated with Columbia 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.
Deer Island by land and water
The Census records 0 square miles of water within Deer Island, or 0% of its total area. It is 4.4 percentage points lower than the 4.4% recorded for Columbia County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Deer Island CDP has 62.2% of the land area of nearby Columbia City city (0.79 square miles). These areas describe boundaries, not comparable property prices.

