What is the sales tax in Sammamish city? - The sales tax in Sammamish city of Washington is 10.3% as of 2025. Use the Sammamish sales tax calculator to calculate the sales tax for any purchase in Sammamish.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Sammamish.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| King | Washington | Sammamish | 98074 | 6.5% | 3.8% | 0% | 10.3% |