Winnebago County's estimated 2025 population is 279,682 with a growth rate of -0.22% in the past year according to the most recent United States census data. Winnebago County is the 7th largest county in Illinois. The 2010 population was 295,090 and has seen a growth of -5.22% since that time.
Data after 2023 is projected based on recent change
The racial composition of Winnebago County includes 69.08% White, 13.34% Black or African American, 5.03% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 195,682 | 69.08% |
| Black or African American | 37,802 | 13.34% |
| Two or more races | 25,927 | 9.15% |
| Other race | 14,262 | 5.03% |
| Asian | 8,079 | 2.85% |
| Native American | 1,437 | 0.51% |
| Native Hawaiian or Pacific Islander | 100 | 0.04% |
Married
Widowed
Divorced
Separated
Never Married
Winnebago County's average per capita income is $44,846. Household income levels show a median of $64,363. The poverty rate stands at 16.02%.
Name | Median | Mean |
|---|---|---|
| Married Families | $100,399 | $120,230 |
| Families | $81,456 | $100,752 |
| Households | $64,363 | $84,470 |
| Non Families | $38,509 | $52,891 |
Average Income
Median Household Income
Poverty Rate
