Napa County ZIP Codes (94503 – 94599) – California

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Napa County is located in Northern California, United States, within the North Bay region of the San Francisco Bay Area. The county is known for its cities, wine-growing communities, rural valleys, hillsides, and residential neighborhoods. ZIP codes in Napa County range from 94503 to 94599 and are assigned by the United States Postal Service (USPS) to support accurate mail delivery, address lookup, and logistics across the county.

Key Information About Napa County ZIP Codes

ItemDetails
CountyNapa County
StateCalifornia
ZIP Code Range94503 – 94599
County SeatNapa
Largest CityNapa
CountryUnited States
ContinentNorth America
Postal AuthorityUnited States Postal Service (USPS)

ZIP Codes of Napa County by City & Community

For more details on ZIP codes in Napa County, see the tables of cities, towns, communities, and notable neighborhoods below.

Napa City Area (94558 – 94559 – 94581)

Place / LocationZIP CodeState
Downtown Napa94559California
Central Napa94558California
North Napa94558California
South Napa94559California
East Napa94558California
West Napa94558California
Alta Heights94559California
Bel Aire94558California
Coombsville94559California
Napa Industrial Area94558California
Napa Valley College Area94558California
Napa PO Boxes94581California

American Canyon Area (94503)

Place / LocationZIP CodeState
American Canyon Central94503California
American Canyon North94503California
American Canyon South94503California
American Canyon East94503California
American Canyon West94503California
Watson Ranch Area94503California

Yountville Area (94599)

Place / LocationZIP CodeState
Yountville Central94599California
Yountville North94599California
Yountville South94599California
Yountville East94599California
Yountville West94599California

St. Helena Area (94574)

Place / LocationZIP CodeState
St. Helena Central94574California
St. Helena North94574California
St. Helena South94574California
St. Helena East94574California
St. Helena West94574California
Spring Mountain Area94574California

Calistoga Area (94515)

Place / LocationZIP CodeState
Calistoga Central94515California
Calistoga North94515California
Calistoga South94515California
Calistoga East94515California
Calistoga West94515California
Mount Saint Helena Area94515California

Rutherford, Oakville & Central Valley Area (94573 – 94562)

Place / LocationZIP CodeState
Rutherford94573California
Oakville94562California
Rutherford Bench Area94573California
Oakville Grade Area94562California
Central Napa Valley Area94573California

Angwin & Howell Mountain Area (94508)

Place / LocationZIP CodeState
Angwin94508California
Howell Mountain Area94508California
Angwin North94508California
Angwin South94508California
Angwin Rural Area94508California

Pope Valley & Eastern Napa County Area (94567)

Place / LocationZIP CodeState
Pope Valley94567California
Berryessa Highlands94567California
Pope Valley North94567California
Pope Valley South94567California
Eastern Rural Area94567California

Napa County also includes vineyard districts, hillside communities, agricultural zones, and rural place names that fall within the ZIP codes listed above. These areas are served by USPS delivery routes connected to nearby cities and towns throughout the county.

About Napa County ZIP Codes

ZIP codes in Napa County help organize mail delivery across cities, towns, and rural areas. Some ZIP codes serve busy city neighborhoods. Others cover vineyards and open land.

Napa city uses multiple ZIP codes due to its size and population. Smaller towns often share ZIP codes with nearby areas.

Using the correct ZIP code helps mail arrive faster. It also supports deliveries, emergency services, and accurate address searches across the county.