Warren County's estimated 2026 population is 16,203 with a growth rate of -0.04% in the past year according to the most recent United States census data. Warren County is the 65th largest county in Illinois. The 2010 population was 17,710 and has seen a growth of -8.51% since that time.
Data after 2023 is projected based on recent change
The racial composition of Warren County includes 84.86% White, 4.61% other race, and smaller percentages for Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (84.86%)
Other race (4.61%)
Two or more races (3.72%)
Black or African American (2.8%)
Asian (2.41%)
Native American (1.2%)
Native Hawaiian or Pacific Islander (0.39%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 14,067 | 84.86% |
| Other race | 764 | 4.61% |
| Two or more races | 617 | 3.72% |
| Black or African American | 464 | 2.8% |
| Asian | 400 | 2.41% |
| Native American | 199 | 1.2% |
| Native Hawaiian or Pacific Islander | 65 | 0.39% |
Married
Widowed
Divorced
Separated
Never Married
Warren County's average per capita income is $43,597. Household income levels show a median of $64,650. The poverty rate stands at 12.84%.
Name | Median | Mean |
|---|---|---|
| Married Families | $96,765 | - |
| Families | $82,684 | $93,232 |
| Households | $64,650 | $82,733 |
| Non Families | $40,800 | $58,564 |
Average Income
Median Household Income
Poverty Rate
