What is the sales tax in zip code 74643? - The sales tax in zip code 74643 in Lamont, Oklahoma is 10.75% as of 2025. Use the 74643 sales tax rate calculator to calculate the sales tax for any purchase in 74643.
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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 |
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| Grant | Oklahoma | Lamont | 74643 | 4.5% | 5% | 1.25% | 10.75% |