THE CLATSOP COUNTY LAND BRIEF
Land in the
Willapa Hills setting.
Clatsop County has 828.2 square miles of land in Oregon. 4 mapped landscape regions meet across Clatsop County: Willapa Hills, Coastal Uplands, Volcanics, among others.
Pacific-facing coastal mountains support moisture-loving conifers, with marine terraces, dunes and beaches along the ocean edge. Inland slopes and the immediate coast have different vegetation patterns.
Regional context: Coast Range ↗ · Regional mapping across the county footprint
Where the landscape changes
Clatsop County intersects 4 mapped regional units. The largest mapped shares are:
- Willapa Hills40.1%
- Coastal Uplands34.2%
- Volcanics16.5%
- Coastal Lowlands9.2%
Finding your parcel within Clatsop County
The atlas lists 10 cities, towns, townships, and Census communities associated with Clatsop County, including Warrenton, Astoria, Seaside. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Clatsop County by land and water
The Census records 255.4 square miles of water within Clatsop County, or 23.6% of its total area. That share is close to Clatsop County’s 23.6%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Clatsop County has 369.8 times the land area of nearby Svensen CDP (2.24 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Columbia County, Tillamook County, Washington County within Oregon. A tract near one of these lines should be matched to the county identifier on its own records.

