What is the sales tax in Boundary county? - The sales tax in Boundary county of Idaho is 6% as of 2025. Use the Boundary sales tax calculator to calculate the sales tax for any purchase in Boundary.
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Below is a list of the sales tax rate for each county in Boundary.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
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| Boundary | Idaho | Bonners Ferry | 83805 | 6% | 1% | 0% | 7% |
| Boundary | Idaho | Eastport | 83826 | 6% | 0% | 0% | 6% |
| Boundary | Idaho | Moyie Springs | 83845 | 6% | 0% | 0% | 6% |
| Boundary | Idaho | Naples | 83847 | 6% | 0% | 0% | 6% |