ZIP code · American Canyon · California · United States
ZIP code 94503 — American Canyon
ZIP code 94503 serves American Canyon, California.
- Postal code
- 94503Single source Value from one source, not cross-checked.
- City
- American Canyon
- County
- Napa FIPS 06055
- State
- California
- Country
- United States
- Coordinates
- 38.1668, -122.2553 — precision precise (locality)
View on OpenStreetMap - Population
- 21,852 (ZCTA, ACS 5-year)
- Population density
- 808 / sq mi
- Land area
- 27 sq mi (70 km²) (ZCTA, ACS 5-year)
- Median household income
- $123,657
- Per-capita income
- $43,366
- Median age
- 36.4
- Households
- 5,971
- Housing units
- 6,129
- Median home value
- $663,900
- Median gross rent
- $2,370 / month
- Congressional districts
- CA-4 (also CA-8) (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)
Tools: compare 94503 with another ZIP · ZIPs within 25 miles · distance from 94503
Map of ZIP code 94503
Climate — monthly normals
Warmest month Sep (avg high 80°F), coldest Dec (avg low 38°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 57 | 61 | 64 | 68 | 73 | 78 | 79 | 80 | 80 | 75 | 65 | 57 |
| Avg low °F | 38 | 40 | 42 | 44 | 48 | 52 | 55 | 54 | 51 | 46 | 40 | 38 |
| Precip in | 4.2 | 4.0 | 3.0 | 1.3 | 0.8 | 0.2 | 0.0 | 0.0 | 0.1 | 0.9 | 2.0 | 3.8 |
NOAA 1991–2020 climate normals from the nearest station: NAPA CO AP (3.4 mi) · NOAA NCEI
Places in ZIP 94503
- 5 schools
- 2 doctors & dentists
- 3 pharmacies
- 2 supermarkets
- 18 restaurants & cafés
- 21 parks
- 24 playgrounds
- 1 gyms & sports centres
- 1 libraries
- 2 post offices
- 2 places of worship
- 2 banks
- 4 gas stations
- 2 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