10 Counties with the Highest Property Tax Rates in Illinois
If you are comparing property taxes across Illinois, these 10 counties have the highest effective rates in the state. The highest-rate county, Lake County, comes in at 2.68% — 0.61% higher than the Illinois average (2.07%). The statewide effective rate is 2.07%.
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| # | County | Effective Rate | Median Tax | Median Home Value |
|---|---|---|---|---|
| 1 | Lake County | 2.68% | $8,743 | $326,600 |
| 2 | DeKalb County | 2.54% | $5,889 | $231,900 |
| 3 | Kendall County | 2.53% | $7,556 | $298,900 |
| 4 | McHenry County | 2.49% | $7,153 | $286,900 |
| 5 | Winnebago County | 2.48% | $3,850 | $155,100 |
| 6 | Stephenson County | 2.46% | $3,140 | $127,500 |
| 7 | Kane County | 2.39% | $7,230 | $303,000 |
| 8 | Will County | 2.35% | $6,993 | $298,000 |
| 9 | Rock Island County | 2.33% | $3,372 | $144,700 |
| 10 | McLean County | 2.27% | $4,503 | $198,300 |
How this ranking is calculated
The effective property tax rate is the median annual property tax paid divided by the median home value in each county, expressed as a percentage. It is the most practical way to compare property tax burden between counties because it neutralizes differences in home values.
Counties with the highest rates in Illinois often share a few characteristics: lower home values and/or higher millage rates driven by school and local service funding needs.
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