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.
White
Black or African American
Two or more races
Other race
Asian
Native American
Native Hawaiian or Pacific Islander
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
