Napa County, CA ZIP Codes & Directory
Complete postal guide for Napa County, California. Featuring the official county seat of Napa, largest municipality Napa, and serving 8 incorporated municipal entities.
Municipalities Located in Napa County
Incorporated Cities, Towns, and Villages
American Canyon
cityZIPs: 94503
Angwin
cityZIPs: 94508
Calistoga
cityZIPs: 94515
Deer Park
cityZIPs: 94576
Napa
cityZIPs: 94558, 94559
Pope Valley
cityZIPs: 94567
Saint Helena
cityZIPs: 94574
Yountville
cityZIPs: 94599
Active USPS ZIP Codes in Napa County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About Napa County, CA
What is the county seat and largest city in Napa County? ▾
The official county seat of Napa County is Napa, and its largest incorporated municipality by population is Napa.
How many cities, towns, and villages are in Napa County? ▾
Napa County encompasses 8 incorporated municipal entities, including 8 cities, 0 towns, and 0 villages.
What is the total population and land area of Napa County? ▾
According to official U.S. Census Bureau data, Napa County has a population of approximately 138,019 residents and spans an area of 748 square miles.
How many ZIP codes operate in Napa County? ▾
There are 9 active USPS ZIP codes serving addresses within Napa County, California.