What is the richest county in Illinois?
DuPage County is the richest county in Illinois by median household income at $110,502, per Census ACS 5-Year estimates.
Context
Wealthy counties tend to cluster around major employment hubs, university towns, and resort communities. They typically combine high educational attainment, knowledge-economy jobs, and constrained housing supply that filters for affluent residents.
Top 10
| Cook County | $81,797 |
| DuPage County | $110,502 |
| Lake County | $108,917 |
| Will County | $107,799 |
| Kane County | $100,678 |
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Frequently Asked Questions
DuPage County is the richest county in Illinois by median household income at $110,502, per Census ACS 5-Year estimates.