Polk County's 2026 population is estimated at 33,574, reflecting a 0.76% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Polk County is the 36th largest county in Missouri. The 2010 population was 31,158 and has grown 7.75% since 2010.
Data after 2023 is projected based on recent change
Overall: 38.1 years
Female: 39.5 years
Male: 36.6 years
There are 24,849 adults, (5,931 of whom are seniors) in Polk County.
Female: 16,531 (51%)
Male: 15,913 (49%)
The racial composition of Polk County includes 91.76% White, and smaller percentages for other race, Asian, Black or African American, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 29,769 | 91.76% |
| Two or more races | 1,660 | 5.12% |
| Other race | 425 | 1.31% |
| Asian | 269 | 0.83% |
| Black or African American | 239 | 0.74% |
| Native American | 82 | 0.25% |
Polk County 's average per capita income is $42,413. Household income levels show a median of $59,647. The poverty rate stands at 16.3%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $84,238 | - |
| Families | $76,145 | $96,414 |
| Households | $59,647 | $80,496 |
| Non Families | $26,602 | $41,901 |
Average Income
Median Household Income
Poverty Rate
