What is the sales tax in Castro Valley city? - The sales tax in Castro Valley city of California is 10.75% as of 2025. Use the Castro Valley sales tax calculator to calculate the sales tax for any purchase in Castro Valley.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Castro Valley.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Alameda | California | Castro Valley | 94552 | 6% | 0.5% | 0.25% | 10.75% |