What is the sales tax in Cosmopolis city? - The sales tax in Cosmopolis city of Washington is 9.08% as of 2025. Use the Cosmopolis sales tax calculator to calculate the sales tax for any purchase in Cosmopolis.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Cosmopolis.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Grays Harbor | Washington | Cosmopolis | 98537 | 6.5% | 2.58% | 0% | 9.08% |