THE GLENN COUNTY LAND BRIEF
Land in the
North Valley Alluvium setting.
Glenn County has 1,313.9 square miles of land in California. 9 mapped landscape regions meet across Glenn County: North Valley Alluvium, Foothill Ridges and Valleys, High North Coast Ranges, among others.
The Sacramento and San Joaquin river systems occupy broad sediment-filled basins, with fans and terraces toward the valley margins. These nearly level landscapes contrast with California's surrounding hills and mountains.
Regional context: Central California Valley ↗ · Regional mapping across the county footprint
Where the landscape changes
Glenn County intersects 9 mapped regional units. The largest mapped shares are:
- North Valley Alluvium20.1%
- Foothill Ridges and Valleys18.3%
- High North Coast Ranges14.9%
- Butte Sink/Sutter and Colusa Basins14.9%
- North Coast Range Eastern Slopes12.4%
Central California Foothills and Coastal Mountains in Glenn County
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.
Read the regional source ↗Klamath Mountains/California High North Coast Range in Glenn 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 Glenn County
The atlas lists 5 cities, towns, townships, and Census communities associated with Glenn County, including Orland, Artois, Willows. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Glenn County by land and water
The Census records 13 square miles of water within Glenn County, or 1% of its total area. That share is close to Glenn County’s 1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Glenn County has 890.8 times the land area of nearby Elk Creek CDP (1.48 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Butte County, Colusa County, Lake County, Mendocino County, Tehama County within California. A tract near one of these lines should be matched to the county identifier on its own records.

