What is the sales tax in zip code 45342? - The sales tax in zip code 45342 in Miamisburg, Ohio is 7.5% as of 2025. Use the 45342 sales tax rate calculator to calculate the sales tax for any purchase in 45342.
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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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| Montgomery | Ohio | Miamisburg | 45342 | 5.75% | 0% | 1.75% | 7.5% |