What is the sales tax in zip code 94531? - The sales tax in zip code 94531 in Antioch, California is 9.75% as of 2025. Use the 94531 sales tax rate calculator to calculate the sales tax for any purchase in 94531.
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Below is a list of the state sales tax, city sales tax, and county tax rate for .
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Contra Costa | California | Antioch | 94531 | 6% | 1% | 0.25% | 9.75% |