There are 10 zip codes in Napa County, California. The most populated is 94558, located in Napa. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
9455865,084Napa
9455928,224Napa
9450321,791American Canyon
945747,827Saint Helena
945993,428Yountville
945083,406Angwin
94567719Pope Valley
94576171Deer Park
94573107Rutherford
945620Oakville

Zip Codes in Napa County, California by Population (2024)