Des Moines County's 2026 population is estimated at 38,004, reflecting a -0.19% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Des Moines County is the 17th largest county in Iowa. The 2010 population was 40,243 and has grown -5.56% since 2010.
Overall: 42.3 years
Female: 43.1 years
Male: 41.5 years
There are 29,927 adults, (8,180 of whom are seniors) in Des Moines County.
Female: 19,413 (50.4%)
Male: 19,074 (49.6%)
The racial composition of Des Moines County includes 85.46% White, 4.75% Black or African American, and smaller percentages for Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 32,890 | 85.46% |
| Two or more races | 2,951 | 7.67% |
| Black or African American | 1,830 | 4.75% |
| Asian | 464 | 1.21% |
| Other race | 225 | 0.58% |
| Native American | 126 | 0.33% |
| Native Hawaiian or Pacific Islander | 1 | 0% |
Des Moines County 's average per capita income is $43,577. Household income levels show a median of $62,928. The poverty rate stands at 12.84%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $94,321 | - |
| Families | $80,337 | $100,230 |
| Households | $62,928 | $80,523 |
| Non Families | $35,051 | $47,128 |
Average Income
Median Household Income
Poverty Rate