Blaine County's 2026 population is estimated at 25,423, reflecting a 0.32% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Blaine County is the 17th largest county in Idaho. The 2010 population was 21,296 and has grown 19.38% since 2010.
Data after 2023 is projected based on recent change
Overall: 45.6 years
Female: 46 years
Male: 44.9 years
There are 20,170 adults, (5,665 of whom are seniors) in Blaine County.
Female: 12,061 (48.3%)
Male: 12,890 (51.7%)
The racial composition of Blaine County includes 77.74% White, 11.07% other race, and smaller percentages for Native American, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 19,398 | 77.74% |
| Other race | 2,762 | 11.07% |
| Two or more races | 2,214 | 8.87% |
| Native American | 332 | 1.33% |
| Asian | 147 | 0.59% |
| Black or African American | 97 | 0.39% |
| Native Hawaiian or Pacific Islander | 1 | 0% |
Blaine County 's average per capita income is $49,087. Household income levels show a median of $92,566. The poverty rate stands at 6.64%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $112,773 | - |
| Families | $102,866 | $151,424 |
| Households | $92,566 | $135,359 |
| Non Families | $68,351 | $105,829 |
Average Income
Median Household Income
Poverty Rate
