What is the sales tax in zip code 73503? - The sales tax in zip code 73503 in Fort Sill, Oklahoma is 9% as of 2025. Use the 73503 sales tax rate calculator to calculate the sales tax for any purchase in 73503.
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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 |
|---|---|---|---|---|---|---|---|
| Comanche | Oklahoma | Fort Sill | 73503 | 4.5% | 4.125% | 0.375% | 9% |