What is the sales tax in zip code 40121? - The sales tax in zip code 40121 in Fort Knox, Kentucky is 6% as of 2025. Use the 40121 sales tax rate calculator to calculate the sales tax for any purchase in 40121.
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Below is a list of the state sales tax, city sales tax, and county tax rate for .
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Hardin | Kentucky | Fort Knox | 40121 | 6% | 0% | 0% | 6% |