Poweshiek County's 2026 population is estimated at 18,368, reflecting a -0.23% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Poweshiek County is the 37th largest county in Iowa. The 2010 population was 18,926 and has grown -2.95% since 2010.
Data after 2023 is projected based on recent change
Overall: 41 years
Female: 42.1 years
Male: 39.9 years
There are 14,952 adults, (3,967 of whom are seniors) in Poweshiek County.
Female: 9,505 (51.3%)
Male: 9,040 (48.7%)
The racial composition of Poweshiek County includes 90.34% White, and smaller percentages for Asian, Black or African American, other race, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 16,754 | 90.34% |
| Two or more races | 977 | 5.27% |
| Asian | 380 | 2.05% |
| Black or African American | 193 | 1.04% |
| Other race | 185 | 1% |
| Native American | 56 | 0.3% |
Poweshiek County 's average per capita income is $49,327. Household income levels show a median of $67,391. The poverty rate stands at 10.75%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $105,808 | - |
| Families | $91,973 | $114,265 |
| Households | $67,391 | $90,285 |
| Non Families | $42,321 | $51,781 |
Average Income
Median Household Income
Poverty Rate
