What is the sales tax in Diamond Bar city? - The sales tax in Diamond Bar city of California is 10.25% as of 2025. Use the Diamond Bar sales tax calculator to calculate the sales tax for any purchase in Diamond Bar.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Diamond Bar.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Los Angeles | California | Diamond Bar | 91765 | 6% | 0.75% | 0.25% | 10.25% |