Mills County's 2026 population is estimated at 14,867, reflecting a 0.51% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Mills County is the 51st largest county in Iowa. The 2010 population was 15,076 and has grown -1.39% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.1 years
Female: 42.3 years
Male: 41.6 years
There are 11,242 adults, (2,921 of whom are seniors) in Mills County.
Female: 7,293 (50.1%)
Male: 7,275 (49.9%)
The racial composition of Mills County includes 93.39% White, and smaller percentages for Asian, other race, Black or African American, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 13,605 | 93.39% |
| Two or more races | 744 | 5.11% |
| Asian | 82 | 0.56% |
| Other race | 62 | 0.43% |
| Black or African American | 59 | 0.4% |
| Native American | 16 | 0.11% |
Mills County 's average per capita income is $56,207. Household income levels show a median of $90,753. The poverty rate stands at 8.22%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $117,282 | - |
| Families | $109,386 | $125,186 |
| Households | $90,753 | $109,810 |
| Non Families | $47,750 | $68,523 |
Average Income
Median Household Income
Poverty Rate
