Highest-earning Counties in Illinois

Sean Pavone // Shutterstock

Highest-earning counties in Illinois

Data shows that annual annual income depends heavily on an individual's educational attainment, race, ethnicity, gender, and even location. One cluster of the United States is particularly well off: The five of the seven counties with the highest median household income in the country can be found in the Washington D.C. metropolitan areas of Maryland and Northern Virginia. These counties can likely attribute their wealth to their proximity to Washington D.C., which attracts highly educated and skilled people in areas of law and public policy. And people in those fields often marry each other, making two high-earning households one very high-earning household.

The 2023 real median household income in the U.S. was $80,610, an increase of 4.0% from 2022, the first statistically significant annual increase in real median household income since 2019.

Stacker compiled a list of the highest-earning counties in Illinois using data from the U.S. Census Bureau. Counties are ranked by 2023 5-year estimate median household income.

Keep reading to learn more about the highest-earning counties in Illinois.

You may also like: Most common settings for foodborne outbreaks in Illinois

#50. Williamson County

- Median household income: $65,521
- Households earning over $100k: 32.0%
- Households earning less than $25k: 17.2%

#49. Henderson County

- Median household income: $65,651
- Households earning over $100k: 30.1%
- Households earning less than $25k: 16.5%

#48. Bureau County

- Median household income: $65,894
- Households earning over $100k: 30.5%
- Households earning less than $25k: 17.3%

#47. Schuyler County

- Median household income: $66,059
- Households earning over $100k: 25.7%
- Households earning less than $25k: 16.3%

#46. Rock Island County

- Median household income: $66,768
- Households earning over $100k: 30.5%
- Households earning less than $25k: 18.2%

You may also like: The scoop on Illinois' ice cream preferences, according to Instacart

#45. Crawford County

- Median household income: $67,614
- Households earning over $100k: 31.1%
- Households earning less than $25k: 20.4%

#44. Kankakee County

- Median household income: $68,325
- Households earning over $100k: 33.9%
- Households earning less than $25k: 15.6%

#43. Shelby County

- Median household income: $68,457
- Households earning over $100k: 29.0%
- Households earning less than $25k: 13.6%

#42. Lee County

- Median household income: $68,459
- Households earning over $100k: 32.3%
- Households earning less than $25k: 17.5%

#41. Macoupin County

- Median household income: $68,518
- Households earning over $100k: 32.2%
- Households earning less than $25k: 16.5%

You may also like: Counties with the worst droughts in Illinois

#40. Randolph County

- Median household income: $68,870
- Households earning over $100k: 30.7%
- Households earning less than $25k: 16.0%

#39. DeKalb County

- Median household income: $69,022
- Households earning over $100k: 34.5%
- Households earning less than $25k: 19.2%

#38. Marshall County

- Median household income: $69,818
- Households earning over $100k: 28.9%
- Households earning less than $25k: 18.5%

#37. Cumberland County

- Median household income: $69,826
- Households earning over $100k: 33.4%
- Households earning less than $25k: 11.6%

#36. Henry County

- Median household income: $69,912
- Households earning over $100k: 34.3%
- Households earning less than $25k: 13.6%

You may also like: Teen drug use varies by state. Here's how Illinois compares.

#35. St. Clair County

- Median household income: $70,178
- Households earning over $100k: 33.9%
- Households earning less than $25k: 17.4%

#34. Clark County

- Median household income: $70,625
- Households earning over $100k: 32.3%
- Households earning less than $25k: 15.8%

#33. Livingston County

- Median household income: $70,796
- Households earning over $100k: 34.1%
- Households earning less than $25k: 13.6%

#32. Jasper County

- Median household income: $71,094
- Households earning over $100k: 35.2%
- Households earning less than $25k: 14.6%

#31. Moultrie County

- Median household income: $71,676
- Households earning over $100k: 33.7%
- Households earning less than $25k: 14.2%

You may also like: Highest-rated Class of 2025 women's basketball recruits from Illinois

#30. Mercer County

- Median household income: $71,710
- Households earning over $100k: 35.0%
- Households earning less than $25k: 15.4%

#29. LaSalle County

- Median household income: $72,281
- Households earning over $100k: 32.3%
- Households earning less than $25k: 15.4%

#28. Brown County

- Median household income: $72,288
- Households earning over $100k: 28.8%
- Households earning less than $25k: 17.7%

#27. Scott County

- Median household income: $73,013
- Households earning over $100k: 32.9%
- Households earning less than $25k: 17.2%

#26. Sangamon County

- Median household income: $74,114
- Households earning over $100k: 36.4%
- Households earning less than $25k: 15.8%

#25. Douglas County

- Median household income: $74,186
- Households earning over $100k: 32.6%
- Households earning less than $25k: 13.8%

#24. Madison County

- Median household income: $74,800
- Households earning over $100k: 35.8%
- Households earning less than $25k: 14.9%

#23. Jo Daviess County

- Median household income: $74,954
- Households earning over $100k: 33.7%
- Households earning less than $25k: 12.9%

#22. Effingham County

- Median household income: $75,380
- Households earning over $100k: 35.6%
- Households earning less than $25k: 14.5%

#21. Washington County

- Median household income: $75,652
- Households earning over $100k: 34.0%
- Households earning less than $25k: 12.4%

You may also like: Highest-rated Class of 2025 football recruits from Illinois

#20. Tazewell County

- Median household income: $76,704
- Households earning over $100k: 36.4%
- Households earning less than $25k: 13.2%

#19. Putnam County

- Median household income: $77,526
- Households earning over $100k: 33.2%
- Households earning less than $25k: 11.4%

#18. McLean County

- Median household income: $78,329
- Households earning over $100k: 39.3%
- Households earning less than $25k: 16.7%

#17. Jersey County

- Median household income: $79,104
- Households earning over $100k: 37.9%
- Households earning less than $25k: 15.4%

#16. Ogle County

- Median household income: $79,244
- Households earning over $100k: 36.9%
- Households earning less than $25k: 13.8%

You may also like: Average Illinois mortgage debt increased to $197,904 in 2024

#15. Menard County

- Median household income: $81,334
- Households earning over $100k: 38.7%
- Households earning less than $25k: 12.5%

#14. Boone County

- Median household income: $81,638
- Households earning over $100k: 41.4%
- Households earning less than $25k: 11.4%

#13. Cook County

- Median household income: $81,797
- Households earning over $100k: 41.3%
- Households earning less than $25k: 16.1%

#12. Clinton County

- Median household income: $82,314
- Households earning over $100k: 40.2%
- Households earning less than $25k: 11.8%

#11. Woodford County

- Median household income: $85,629
- Households earning over $100k: 42.9%
- Households earning less than $25k: 12.7%

You may also like: Average student loan debt increased in first half of 2024 in Illinois

#10. Piatt County

- Median household income: $87,516
- Households earning over $100k: 40.7%
- Households earning less than $25k: 10.9%

#9. Calhoun County

- Median household income: $92,095
- Households earning over $100k: 44.6%
- Households earning less than $25k: 9.6%

#8. Grundy County

- Median household income: $93,060
- Households earning over $100k: 45.9%
- Households earning less than $25k: 10.0%

#7. Kane County

- Median household income: $100,678
- Households earning over $100k: 50.4%
- Households earning less than $25k: 9.2%

#6. Monroe County

- Median household income: $101,635
- Households earning over $100k: 50.9%
- Households earning less than $25k: 10.2%

You may also like: As more states adopt traffic enforcement cameras, here's where Illinois stands

#5. McHenry County

- Median household income: $102,836
- Households earning over $100k: 51.5%
- Households earning less than $25k: 8.1%

#4. Will County

- Median household income: $107,799
- Households earning over $100k: 53.7%
- Households earning less than $25k: 8.6%

#3. Lake County

- Median household income: $108,917
- Households earning over $100k: 54.0%
- Households earning less than $25k: 9.8%

#2. Kendall County

- Median household income: $110,474
- Households earning over $100k: 55.6%
- Households earning less than $25k: 5.4%

#1. DuPage County

- Median household income: $110,502
- Households earning over $100k: 54.4%
- Households earning less than $25k: 8.3%

You may also like: What is a family or resident nursing home council and how common are they in Illinois?

Highest-earning counties in Illinois