Blaine County's 2026 population is estimated at 6,941, reflecting a 0.27% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Blaine County is the 31st largest county in Montana. The 2010 population was 6,503 and has grown 6.74% since 2010.
Data after 2023 is projected based on recent change
Overall: 35.6 years
Female: 38 years
Male: 34.5 years
There are 4,933 adults, (1,163 of whom are seniors) in Blaine County.
Female: 3,476 (50%)
Male: 3,473 (50%)
The racial composition of Blaine County includes 48.22% Native American, 44.16% White, and smaller percentages for Black or African American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Native American | 3,351 | 48.22% |
| White | 3,069 | 44.16% |
| Two or more races | 493 | 7.09% |
| Black or African American | 29 | 0.42% |
| Asian | 7 | 0.1% |
Blaine County 's average per capita income is $43,950. Household income levels show a median of $64,813. The poverty rate stands at 18.29%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $89,167 | $105,256 |
| Families | $83,214 | $101,634 |
| Households | $64,813 | $84,264 |
| Non Families | $24,875 | $39,509 |
Average Income
Median Household Income
Poverty Rate
