Illinois Gazetteer
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
| County | Wealth Index | |
|---|---|---|
| 1. | Lake County | 149 |
| 2. | DuPage County | 147 |
| 3. | Monroe County | 135 |
| 4. | Calhoun County | 131 |
| 5. | McHenry County | 128 |
| 6. | Kane County | 125 |
| 7. | Will County | 124 |
| 8. | Woodford County | 119 |
| 9. | Jersey County | 115 |
| 10. | Grundy County | 114 |
| 11. | Kendall County | 109 |
| 12. | Piatt County | 103 |
| 13. | Boone County | 101 |
| 14. | Sangamon County | 98 |
| 15. | Cook County | 96 |
| 16. | Clinton County | 95 |
| 17. | McLean County | 95 |
| 18. | Menard County | 95 |
| 19. | Jo Daviess County | 94 |
| 20. | Tazewell County | 92 |
