Winneshiek County's 2026 population is estimated at 19,713, reflecting a -0.03% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Winneshiek County is the 33rd largest county in Iowa. The 2010 population was 21,076 and has grown -6.47% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.6 years
Female: 43.5 years
Male: 41.8 years
There are 16,159 adults, (4,632 of whom are seniors) in Winneshiek County.
Female: 9,784 (49.2%)
Male: 10,089 (50.8%)
The racial composition of Winneshiek County includes 93.48% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 18,578 | 93.48% |
| Two or more races | 897 | 4.51% |
| Other race | 136 | 0.68% |
| Asian | 107 | 0.54% |
| Black or African American | 81 | 0.41% |
| Native American | 73 | 0.37% |
| Native Hawaiian or Pacific Islander | 1 | 0.01% |
Winneshiek County 's average per capita income is $49,069. Household income levels show a median of $79,066. The poverty rate stands at 8.4%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $103,252 | - |
| Families | $100,599 | $125,096 |
| Households | $79,066 | $100,242 |
| Non Families | $44,984 | $56,861 |
Average Income
Median Household Income
Poverty Rate
