Big Horn County's 2026 population is estimated at 12,738, reflecting a -0.23% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Big Horn County is the 16th largest county in Montana. The 2010 population was 12,912 and has grown -1.35% since 2010.
Data after 2023 is projected based on recent change
Overall: 31.9 years
Female: 32.9 years
Male: 31.2 years
There are 8,850 adults, (1,814 of whom are seniors) in Big Horn County.
Female: 6,556 (50.9%)
Male: 6,335 (49.1%)
The racial composition of Big Horn County includes 66.77% Native American, 29.87% White, and smaller percentages for Two or more races, Black or African American, Asian, other race and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Native American | 8,607 | 66.77% |
| White | 3,851 | 29.87% |
| Two or more races | 360 | 2.79% |
| Black or African American | 34 | 0.26% |
| Asian | 25 | 0.19% |
| Other race | 14 | 0.11% |
Big Horn County 's average per capita income is $35,529. Household income levels show a median of $58,750. The poverty rate stands at 22.08%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $72,368 | - |
| Families | $64,336 | $87,041 |
| Households | $58,750 | $73,453 |
| Non Families | $30,354 | $40,529 |
Average Income
Median Household Income
Poverty Rate
