THE YOLO COUNTY LAND BRIEF
Land in the
Yolo Alluvial Fans setting.
Yolo County has 1,013 square miles of land in California. 8 mapped landscape regions meet across Yolo County: Yolo Alluvial Fans, Foothill Ridges and Valleys, Western Valley Foothills/Dunnigan Hills, 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
Yolo County intersects 8 mapped regional units. The largest mapped shares are:
- Yolo Alluvial Fans36.5%
- Foothill Ridges and Valleys17.6%
- Western Valley Foothills/Dunnigan Hills17.4%
- Yolo/American Basin13%
- Butte Sink/Sutter and Colusa Basins5.3%
Central California Foothills and Coastal Mountains in Yolo 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 ↗Finding your parcel within Yolo County
The atlas lists 17 cities, towns, townships, and Census communities associated with Yolo County, including West Sacramento, Woodland, Davis. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Yolo County by land and water
The Census records 8.84 square miles of water within Yolo County, or 0.9% of its total area. That share is close to Yolo County’s 0.9%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Yolo County has 254 times the land area of nearby Monument Hills CDP (3.99 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Colusa County, Lake County, Napa County, Sacramento County, Solano County, Sutter County within California. A tract near one of these lines should be matched to the county identifier on its own records.

