10 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 94558 | Napa | 63,657 |
| 94559 | Napa | 27,714 |
| 94503 | American Canyon | 21,841 |
| 94574 | Saint Helena | 7,457 |
| 94508 | Angwin | 3,495 |
| 94599 | Yountville | 3,348 |
| 94567 | Pope Valley | 668 |
| 94576 | Deer Park | 103 |
| 94573 | Rutherford | 84 |
| 94562 | Oakville | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 10 ZCTAs in Napa County, California (US Census).