Mahaska County's estimated 2025 population is 21,680 with a growth rate of -0.45% in the past year according to the most recent United States census data. Mahaska County is the 28th largest county in Iowa. The 2010 population was 22,409 and has seen a growth of -3.25% since that time.
Data after 2023 is projected based on recent change
The racial composition of Mahaska County includes 93.17% White, and smaller percentages for Black or African American, Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 20,540 | 93.17% |
| Two or more races | 755 | 3.42% |
| Black or African American | 338 | 1.53% |
| Asian | 258 | 1.17% |
| Other race | 123 | 0.56% |
| Native American | 30 | 0.14% |
| Native Hawaiian or Pacific Islander | 1 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Mahaska County's average per capita income is $44,056. Household income levels show a median of $69,019. The poverty rate stands at 11.85%.
Name | Median | Mean |
|---|---|---|
| Married Families | $94,575 | - |
| Families | $83,414 | $102,196 |
| Households | $69,019 | $84,768 |
| Non Families | $36,342 | $47,693 |
Average Income
Median Household Income
Poverty Rate
