Iroquois County's 2026 population is estimated at 26,135, reflecting a 0.13% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Iroquois County is the 50th largest county in Illinois. The 2010 population was 29,701 and has grown -12.01% since 2010.
Data after 2023 is projected based on recent change
Overall: 44.4 years
Female: 45.5 years
Male: 43 years
There are 20,746 adults, (5,977 of whom are seniors) in Iroquois County.
Female: 13,327 (50.4%)
Male: 13,122 (49.6%)
The racial composition of Iroquois County includes 88.78% White, 4% other race, and smaller percentages for Black or African American, Native American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 23,481 | 88.78% |
| Two or more races | 1,471 | 5.56% |
| Other race | 1,058 | 4% |
| Black or African American | 213 | 0.81% |
| Native American | 137 | 0.52% |
| Asian | 89 | 0.34% |
Iroquois County 's average per capita income is $46,608. Household income levels show a median of $66,255. The poverty rate stands at 12.5%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $102,962 | $118,946 |
| Families | $86,352 | $103,145 |
| Households | $66,255 | $84,074 |
| Non Families | $36,352 | $46,656 |
Average Income
Median Household Income
Poverty Rate
