Madison County's 2026 population is estimated at 262,167, reflecting a -0.16% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Madison County is the 8th largest county in Illinois. The 2010 population was 269,315 and has grown -2.65% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.2 years
Female: 41.2 years
Male: 39.3 years
There are 207,890 adults, (48,934 of whom are seniors) in Madison County.
Female: 135,078 (51.1%)
Male: 129,160 (48.9%)
The racial composition of Madison County includes 83.04% White, 7.82% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 219,413 | 83.04% |
| Black or African American | 20,666 | 7.82% |
| Two or more races | 18,528 | 7.01% |
| Other race | 2,819 | 1.07% |
| Asian | 2,245 | 0.85% |
| Native American | 500 | 0.19% |
| Native Hawaiian or Pacific Islander | 67 | 0.03% |
Madison County 's average per capita income is $53,993. Household income levels show a median of $75,793. The poverty rate stands at 11.06%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $119,190 | $139,287 |
| Families | $97,683 | $118,795 |
| Households | $75,793 | $98,419 |
| Non Families | $46,382 | $60,234 |
Average Income
Median Household Income
Poverty Rate