Mahaska County's estimated 2026 population is 21,848 with a growth rate of -0.15% 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 -2.5% since that time.
Data after 2023 is projected based on recent change
Overall: 39 years
Female: 39.5 years
Male: 38.2 years
There are 16,808 adults, (4,199 of whom are seniors) in Mahaska County.
Female: 10,832 (49.2%)
Male: 11,189 (50.8%)
The racial composition of Mahaska County includes 92.23% White, and smaller percentages for Black or African American, Asian, other race, Native Hawaiian or Pacific Islander, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 20,310 | 92.23% |
| Two or more races | 955 | 4.34% |
| Black or African American | 293 | 1.33% |
| Asian | 229 | 1.04% |
| Other race | 151 | 0.69% |
| Native Hawaiian or Pacific Islander | 65 | 0.3% |
| Native American | 18 | 0.08% |
Mahaska County's average per capita income is $45,796. Household income levels show a median of $70,940. The poverty rate stands at 12.64%.
Name | Median | Mean |
|---|---|---|
| Married Families | $98,599 | - |
| Families | $88,504 | $105,526 |
| Households | $70,940 | $86,931 |
| Non Families | $37,849 | $50,114 |
Average Income
Median Household Income
Poverty Rate
