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ZIP Codes in Napa County with Associated Cities & Towns

American Canyon   94503
American Cyn   94503
Angwin   94508
Angwin   94576
Calistoga   94515
Deer Park   94576
 Napa   94558
Napa   94559
Napa   94581
Oakville   94562
Pope Valley   94567
 Rutherford   94573
Saint Helena   94574
Spanish Flat   94558
Vallejo   94503
Yountville   94599

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.