Mercer Island Sales Tax
What is the sales tax for Mercer Island, Washington? - The sales tax for Mercer Island, Washington is 10.2% as of 2025. 10.2% is the combine sales tax from 6.5% of Washington state sales tax, 3.7% of local sales tax, and 0% of King county sales tax.
| State | Washington | State Tax | 6.5% |
|---|---|---|---|
| City | Mercer Island | City Tax | 3.7% |
| County | King | County Tax | 0% |
| Special Tax | 0% | ||
| Total Sales Tax | 10.2% | ||
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