What is the sales tax in Haddam city? - The sales tax in Haddam city of Kansas is 8.5% as of 2025. Use the Haddam sales tax calculator to calculate the sales tax for any purchase in Haddam.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Haddam.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Washington | Kansas | Haddam | 66944 | 6.5% | 0% | 2% | 8.5% |