What is the sales tax in Monmouth city? - The sales tax in Monmouth city of Illinois is 11% as of 2026. Use the Monmouth sales tax calculator to calculate the sales tax for any purchase in Monmouth.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Monmouth.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Warren | Illinois | Monmouth | 61462 | 6.25% | 2% | 1.75% | 11% |