THE ST. HELENA LAND BRIEF
Land in the
Napa-Sonoma-Russian River Valleys setting.
St. Helena city has 4.96 square miles of land in Napa County. Its Census reference point is in Napa-Sonoma-Russian River Valleys, within Central California Foothills and Coastal Mountains.
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 ↗ · Classification at the Census reference point
St. Helena and Napa County
St. Helena is associated with Napa County in the Census boundary data. Start with the parcel’s tax bill to match the property to that jurisdiction, then confirm which government handles its land use.
St. Helena by land and water
The Census records 0.13 square miles of water within St. Helena, or 2.5% of its total area. It is 2.6 percentage points lower than the 5.1% recorded for Napa County. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, St. Helena city has 88.3% of the land area of nearby Deer Park CDP (5.62 square miles). These areas describe boundaries, not comparable property prices.

