Buena Vista County's 2026 population is estimated at 20,243, reflecting a -1.01% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Buena Vista County is the 31st largest county in Iowa. The 2010 population was 20,356 and has grown -0.56% since 2010.
Overall: 35.6 years
Female: 35.9 years
Male: 35.3 years
There are 15,234 adults, (3,373 of whom are seniors) in Buena Vista County.
Female: 10,209 (49.2%)
Male: 10,544 (50.8%)
The racial composition of Buena Vista County includes 60.03% White, 11.27% other race, 9.55% Asian, 3.27% Black or African American, and smaller percentages for Native Hawaiian or Pacific Islander, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 12,457 | 60.03% |
| Two or more races | 2,604 | 12.55% |
| Other race | 2,338 | 11.27% |
| Asian | 1,982 | 9.55% |
| Black or African American | 679 | 3.27% |
| Native Hawaiian or Pacific Islander | 608 | 2.93% |
| Native American | 85 | 0.41% |
Buena Vista County 's average per capita income is $47,823. Household income levels show a median of $71,719. The poverty rate stands at 7.79%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $101,442 | - |
| Families | $91,853 | $111,583 |
| Households | $71,719 | $94,361 |
| Non Families | $50,871 | $60,476 |
Average Income
Median Household Income
Poverty Rate