What is the sales tax in Great Falls city? - The sales tax in Great Falls city of Montana is 0% as of 2026. Use the Great Falls sales tax calculator to calculate the sales tax for any purchase in Great Falls.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Great Falls.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Cascade | Montana | Great Falls | 59405 | 0% | 0% | 0% | 0% |