Warren County's estimated 2026 population is 16,328 with a growth rate of 0.65% in the past year according to the most recent United States census data. Warren County is the 64th largest county in Illinois. The 2010 population was 17,710 and has seen a growth of -7.8% since that time.
Data after 2023 is projected based on recent change
Overall: 38.5 years
Female: 40.5 years
Male: 36.7 years
There are 12,754 adults, (3,286 of whom are seniors) in Warren County.
Female: 8,182 (49.7%)
Male: 8,265 (50.3%)
The racial composition of Warren County includes 82.84% White, 4.96% other race, and smaller percentages for Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 13,624 | 82.84% |
| Two or more races | 947 | 5.76% |
| Other race | 816 | 4.96% |
| Black or African American | 438 | 2.66% |
| Asian | 395 | 2.4% |
| Native American | 157 | 0.95% |
| Native Hawaiian or Pacific Islander | 70 | 0.43% |
Warren County's average per capita income is $43,745. Household income levels show a median of $67,385. The poverty rate stands at 14.63%.
Name | Median | Mean |
|---|---|---|
| Married Families | $98,500 | - |
| Families | $83,542 | $95,913 |
| Households | $67,385 | $86,803 |
| Non Families | $40,167 | $64,051 |
Average Income
Median Household Income
Poverty Rate
