Founded in 1850, Napa County is one of 58 counties in the state of California. The city of Napa is the county seat. With FIPS code of 55, Napa County has a population of 136,207 and area of 754 square miles (1,953 km2).
List of all cities in Napa County, CA alphabetically
| City/Town | Postal Code | Area Code |
| American Canyon, CA | 94503 | 707 |
| Angwin, CA | 94508 | 707 |
| Angwin, CA | 94576 | 707 |
| Calistoga, CA | 94515 | 707 |
| Deer Park, CA | 94576 | 707 |
| Napa, CA | 94558 | 707 |
| 94559 | 707 | |
| 94581 | 707 | |
| Oakville, CA | 94562 | 707 |
| Pope Valley, CA | 94567 | 707 |
| Rutherford, CA | 94573 | 707 |
| Saint Helena, CA | 94574 | 707 |
| Spanish Flat, CA | 94558 | 707 |
| Vallejo, CA | 94503 | 707 |
| Yountville, CA | 94599 | 707 |
Map of Cities in Napa County, CA
