Owyhee County's 2026 population is estimated at 12,720, reflecting a -0.11% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Owyhee County is the 28th largest county in Idaho. The 2010 population was 11,474 and has grown 10.86% since 2010.
Data after 2023 is projected based on recent change
Overall: 39 years
Female: 40.1 years
Male: 38.3 years
There are 9,447 adults, (2,414 of whom are seniors) in Owyhee County.
Female: 6,038 (48.3%)
Male: 6,465 (51.7%)
The racial composition of Owyhee County includes 69.82% White, 11.09% other race, 4.89% Native American, and smaller percentages for Black or African American, Native Hawaiian or Pacific Islander, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 8,729 | 69.82% |
| Two or more races | 1,669 | 13.35% |
| Other race | 1,386 | 11.09% |
| Native American | 611 | 4.89% |
| Black or African American | 66 | 0.53% |
| Native Hawaiian or Pacific Islander | 25 | 0.2% |
| Asian | 17 | 0.14% |
Owyhee County 's average per capita income is $42,423. Household income levels show a median of $64,406. The poverty rate stands at 12.24%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $83,534 | - |
| Families | $78,897 | $90,226 |
| Households | $64,406 | $79,387 |
| Non Families | $34,778 | $51,134 |
Average Income
Median Household Income
Poverty Rate
