What is the sales tax in Cowlitz county? - The sales tax in Cowlitz county of Washington is 7.7% as of 2025. Use the Cowlitz sales tax calculator to calculate the sales tax for any purchase in Cowlitz.
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Below is a list of the sales tax rate for each county in Cowlitz.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
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| Cowlitz | Washington | Ariel | 98603 | 6.5% | 0% | 1.2% | 7.7% |
| Cowlitz | Washington | Castle Rock | 98611 | 6.5% | 1.4% | 0% | 7.9% |
| Cowlitz | Washington | Cougar | 98616 | 6.5% | 0% | 1.2% | 7.7% |
| Cowlitz | Washington | Kalama | 98625 | 6.5% | 1.5% | 0% | 8% |
| Cowlitz | Washington | Kelso | 98626 | 6.5% | 1.6% | 0% | 8.1% |
| Cowlitz | Washington | Longview | 98632 | 6.5% | 1.6% | 0% | 8.1% |
| Cowlitz | Washington | Ryderwood | 98581 | 6.5% | 0% | 1.2% | 7.7% |
| Cowlitz | Washington | Silverlake | 98645 | 6.5% | 0% | 1.2% | 7.7% |
| Cowlitz | Washington | Toutle | 98649 | 6.5% | 0% | 1.2% | 7.7% |
| Cowlitz | Washington | Woodland | 98674 | 6.5% | 1.4% | 0% | 7.9% |