Winnebago County's 2026 population is estimated at 10,023, reflecting a -1.76% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Winnebago County is the 72nd largest county in Iowa. The 2010 population was 10,845 and has grown -7.58% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.7 years
Female: 44 years
Male: 41.4 years
There are 8,354 adults, (2,341 of whom are seniors) in Winnebago County.
Female: 5,116 (48.3%)
Male: 5,467 (51.7%)
The racial composition of Winnebago County includes 89.42% White, and smaller percentages for Black or African American, Asian, other race, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 9,463 | 89.42% |
| Two or more races | 634 | 5.99% |
| Black or African American | 237 | 2.24% |
| Asian | 140 | 1.32% |
| Other race | 87 | 0.82% |
| Native American | 22 | 0.21% |
Winnebago County 's average per capita income is $46,646. Household income levels show a median of $67,642. The poverty rate stands at 11.18%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $100,938 | - |
| Families | $88,750 | $107,301 |
| Households | $67,642 | $85,071 |
| Non Families | $41,006 | $52,515 |
Average Income
Median Household Income
Poverty Rate