| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in American Canyon, Napa | 94503 |
| Postal/ZIP Codes in Angwin, Napa | 94508 |
| Postal/ZIP Codes in Calistoga, Napa | 94515 |
| Postal/ZIP Codes in Deer Park, Napa | 94576 |
| Postal/ZIP Codes in Napa, Napa | 94558, 94559 |
| Postal/ZIP Codes in Oakville, Napa | 94562 |
| Postal/ZIP Codes in Pope Valley, Napa | 94567 |
| Postal/ZIP Codes in Rutherford, Napa | 94573 |
| Postal/ZIP Codes in Saint Helena, Napa | 94574 |
| Postal/ZIP Codes in Spanish Flat, Napa | 94558 |
| Postal/ZIP Codes in Vallejo, Napa | 94503 |
| Postal/ZIP Codes in Yountville, Napa | 94599 |