What is the sales tax in Round Mountain city? - The sales tax in Round Mountain city of Texas is 8.25% as of 2026. Use the Round Mountain sales tax calculator to calculate the sales tax for any purchase in Round Mountain.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Round Mountain.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Blanco | Texas | Round Mountain | 78663 | 6.25% | 0% | 0% | 8.25% |