THE LAKE COUNTY LAND BRIEF
Land in the
North Coast Range Eastern Slopes setting.
Lake County has 1,255.1 square miles of land in California. 7 mapped landscape regions meet across Lake County: North Coast Range Eastern Slopes, Clear Lake Hills and Valleys, Outer North Coast Ranges, among others.
Oak woodland, chaparral and grassland occupy foothills and low coastal mountains around the Central Valley. Narrow agricultural valleys interrupt this landscape of dry summers and wetter winters.
Regional context: Central California Foothills and Coastal Mountains ↗ · Regional mapping across the county footprint
Where the landscape changes
Lake County intersects 7 mapped regional units. The largest mapped shares are:
- North Coast Range Eastern Slopes30%
- Clear Lake Hills and Valleys18.8%
- Outer North Coast Ranges15%
- Mayacmas Mountains12.3%
- High North Coast Ranges11.5%
Klamath Mountains/California High North Coast Range in Lake 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 Lake County
The atlas lists 15 cities, towns, townships, and Census communities associated with Lake County, including Clearlake, Hidden Valley Lake, Lucerne. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Lake County by land and water
The Census records 73 square miles of water within Lake County, or 5.5% of its total area. That share is close to Lake County’s 5.5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Lake County has 233.4 times the land area of nearby Lucerne CDP (5.38 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Colusa County, Glenn County, Mendocino County, Napa County, Sonoma County, Yolo County within California. A tract near one of these lines should be matched to the county identifier on its own records.

