THE COOS COUNTY LAND BRIEF
Land in the
Mid-Coastal Sedimentary setting.
Coos County has 1,596.1 square miles of land in Oregon. 5 mapped landscape regions meet across Coos County: Mid-Coastal Sedimentary, Coastal Lowlands, Coastal Uplands, 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
Coos County intersects 5 mapped regional units. The largest mapped shares are:
- Mid-Coastal Sedimentary59.7%
- Coastal Lowlands16.2%
- Coastal Uplands13.7%
- Southern Oregon Coastal Mountains10.1%
- Coastal Siskiyous0.2%
Klamath Mountains/California High North Coast Range in Coos County
Dissected ridges, valleys and foothills combine varied rock types with diverse conifer and hardwood forests. The Klamath and Siskiyou ranges differ geologically from the volcanic Cascades to the east.
Read the regional source ↗Finding your parcel within Coos County
The atlas lists 11 cities, towns, townships, and Census communities associated with Coos County, including Coos Bay, North Bend, Glasgow. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Coos County by land and water
The Census records 210.3 square miles of water within Coos County, or 11.6% of its total area. That share is close to Coos County’s 11.6%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Coos County has 577.9 times the land area of nearby Coquille city (2.76 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Curry County, Douglas County within Oregon. A tract near one of these lines should be matched to the county identifier on its own records.

