What is the sales tax in Napa county? - The sales tax in Napa county of California is 7.75% as of 2025. Use the Napa sales tax calculator to calculate the sales tax for any purchase in Napa.
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Below is a list of the sales tax rate for each county in Napa.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
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| Napa | California | American Canyon | 94503 | 6% | 1.875% | 0.25% | 9.25% |
| Napa | California | Angwin | 94508 | 6% | 0% | 0.25% | 7.75% |
| Napa | California | Calistoga | 94515 | 6% | 0% | 0.25% | 9% |
| Napa | California | Deer Park | 94576 | 6% | 0% | 0.25% | 7.75% |
| Napa | California | Napa | 94558 | 6% | 0% | 0.25% | 9% |
| Napa | California | Pope Valley | 94567 | 6% | 0% | 0.25% | 7.75% |
| Napa | California | Rutherford | 94573 | 6% | 0% | 0.25% | 7.75% |
| Napa | California | Saint Helena | 94574 | 6% | 0% | 0.25% | 9% |
| Napa | California | Yountville | 94599 | 6% | 0% | 0.25% | 7.75% |