ZIP code · Saint Helena · California · United States
ZIP code 94574 — Saint Helena
ZIP code 94574 serves Saint Helena, California.
- Postal code
- 94574Single source Value from one source, not cross-checked.
- City
- Saint Helena
- County
- Napa FIPS 06055
- State
- California
- Country
- United States
- Coordinates
- 38.5138, -122.4619 — precision precise (locality)
View on OpenStreetMap - Population
- 7,646 (ZCTA, ACS 5-year)
- Population density
- 62 / sq mi
- Land area
- 124.3 sq mi (321.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $139,779
- Per-capita income
- $105,505
- Median age
- 47.5
- Households
- 3,293
- Housing units
- 4,112
- Median home value
- $1,876,500
- Median gross rent
- $2,065 / month
- Congressional districts
- CA-4 (also CA-2) (119th Congress)
- USDA hardiness zone
- 9b (25 to 30 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
- Area code
- 707Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 94574 with another ZIP · ZIPs within 25 miles · distance from 94574
Map of ZIP code 94574
Climate — monthly normals
Warmest month Aug (avg high 89°F), coldest Dec (avg low 40°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 59 | 63 | 67 | 72 | 78 | 85 | 89 | 89 | 87 | 78 | 66 | 58 |
| Avg low °F | 40 | 42 | 44 | 46 | 51 | 54 | 56 | 56 | 54 | 49 | 44 | 40 |
| Precip in | 6.5 | 6.7 | 5.0 | 2.0 | 1.3 | 0.3 | 0.0 | 0.0 | 0.1 | 1.6 | 3.2 | 7.2 |
NOAA 1991–2020 climate normals from the nearest station: SAINT HELENA (0.7 mi) · NOAA NCEI
Places in ZIP 94574
- 7 schools
- 1 colleges & universities
- 1 hospitals & clinics
- 2 supermarkets
- 12 restaurants & cafés
- 3 bars & pubs
- 7 parks
- 1 gyms & sports centres
- 1 libraries
- 1 post offices
- 3 places of worship
- 2 banks
- 3 gas stations
- 2 EV charging stations
- 4 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page