These are the 10 richest counties in Illinois, analysis finds. How St. Clair County fared
With a median income of $63,017, St. Clair County is the 28th wealthiest county in Illinois, according to a recent analysis from tech company SmartAsset.
Measuring median income, investment income and median home value of each county, SmartAsset ranked all U.S. counties on wealth. The company used data from the U.S. Census Bureau, the Internal Revenue Service and popular real estate site Zillow for the report.
St. Clair County’s median income is about $9,500 less than the statewide figure, which is $72,563. The county’s investment income, meanwhile, is about the same as the statewide number, at $21,989 to Illinois’ $21,770.
According to the U.S. Census Bureau, 13.3% of St. Clair County’s population lives in poverty.
With a median income exceeding $100,000, DuPage County is the richest county in Illinois, SmartAsset reports. Just one metro-east county, Monroe, made the top 10 list.
Here’s a closer look at the 10 wealthiest counties in the state.
Wealthiest counties in Illinois
No. 1: DuPage County
- Median income: $100,292
- Investment income: $47,000
- Median home value: $359,501
No. 2: Lake County
- Median income: $97,127
- Investment income: $84,289
- Median home value: $320,341
No. 3: Kendall County
- Median income: $101,816
- Investment income: $13,829
- Median home value: $321,161
No. 4: Will County
- Median income: $95,751
- Investment income: $22,116
- Median home value: $306,049
No. 5: Kane County
- Median income: $88,935
- Investment income: $29,424
- Median home value: $316,163
No. 6: Cook County
- Median income: $72,121
- Investment income: $80,782
- Median home value: $284,464
No. 7: McHenry County
- Median income: $93,801
- Investment income: $25,563
- Median home value: $299,253
No. 8: Monroe County
- Median income: $92,950
- Investment income: $19,321
- Median home value: $257,961
No. 9: Grundy County
- Median income: $81,764
- Investment income: $20,765
- Median home value: $265,309
No. 10: DeKalb County
- Median income: $64,019
- Investment income: $23,231
- Median home value: $228,999
How does Illinois stack up nationally?
DuPage County, while the wealthiest in Illinois, ranked 171st nationally. Lake County came in at the 262nd spot. St. Clair ranked 1,477th among the richest counties in the U.S.
Four California counties and one in Massachusetts made up the top five, while counties in New York, Wyoming and Virginia all made it into the top 10.
With a median income of $136,837, San Mateo County in California took first place as the richest U.S. county.
This story was originally published June 21, 2023 at 12:44 PM.
