What is the sales tax in Mount Prospect city? - The sales tax in Mount Prospect city of Illinois is 10.25% as of 2025. Use the Mount Prospect sales tax calculator to calculate the sales tax for any purchase in Mount Prospect.
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Below is a list of the state sales tax, city sales tax, and county tax rate for Mount Prospect.
| County | State | City | Zip Code | State Tax | City Tax | County Tax | Total Tax |
|---|---|---|---|---|---|---|---|
| Cook | Illinois | Mount Prospect | 60056 | 6.25% | 1% | 1.75% | 10.25% |