Illinois County Sales Tax Rates 2026
All 10 counties · State rate: 6.25% · Avg combined: 8.10%
Illinois Sales Tax Calculator
Total with Tax
$0.00
Highest Rate
10.25%
Cook County
Lowest Rate
7.25%
Lake County
Average Rate
8.10%
Across 10 counties
| County | Combined Rate | State Rate | Local Rate | Population |
|---|---|---|---|---|
| Cook County | 10.25% | 6.25% | 4% | 5,150,000 |
| DuPage County | 7.75% | 6.25% | 1.5% | 930,000 |
| Lake County | 7.25% | 6.25% | 1% | 700,000 |
| Will County | 8% | 6.25% | 1.75% | 700,000 |
| Kane County | 7.75% | 6.25% | 1.5% | 520,000 |
| McHenry County | 7.25% | 6.25% | 1% | 310,000 |
| Winnebago County | 8% | 6.25% | 1.75% | 290,000 |
| Madison County | 7.6% | 6.25% | 1.35% | 270,000 |
| St. Clair County | 8.1% | 6.25% | 1.85% | 260,000 |
| Champaign County | 9% | 6.25% | 2.75% | 210,000 |
Illinois City Tax Guides
Last Updated: March 2026. Consult a licensed tax professional.