Jasper County's 2026 population is estimated at 38,339, reflecting a 0.3% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Jasper County is the 17th largest county in Iowa. The 2010 population was 36,810 and has grown 4.15% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.3 years
Female: 43 years
Male: 39.9 years
There are 29,597 adults, (7,500 of whom are seniors) in Jasper County.
Female: 18,082 (47.6%)
Male: 19,872 (52.4%)
The racial composition of Jasper County includes 91.71% White, and smaller percentages for Black or African American, other race, Asian, Native Hawaiian or Pacific Islander, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 34,806 | 91.71% |
| Two or more races | 1,604 | 4.23% |
| Black or African American | 583 | 1.54% |
| Other race | 583 | 1.54% |
| Asian | 281 | 0.74% |
| Native Hawaiian or Pacific Islander | 65 | 0.17% |
| Native American | 32 | 0.08% |
Jasper County 's average per capita income is $47,863. Household income levels show a median of $71,311. The poverty rate stands at 8.3%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $102,339 | $129,442 |
| Families | $90,965 | $115,908 |
| Households | $71,311 | $95,279 |
| Non Families | $43,129 | $55,470 |
Average Income
Median Household Income
Poverty Rate
