Boundary County's 2026 population is estimated at 14,138, reflecting a 1.01% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Boundary County is the 24th largest county in Idaho. The 2010 population was 10,998 and has grown 28.55% since 2010.
Overall: 43.7 years
Female: 44 years
Male: 43.6 years
There are 10,100 adults, (3,093 of whom are seniors) in Boundary County.
Female: 6,461 (49.1%)
Male: 6,711 (50.9%)
The racial composition of Boundary County includes 82.89% White, 3.48% other race, and smaller percentages for Asian, Native American, Black or African American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 10,918 | 82.89% |
| Two or more races | 1,273 | 9.66% |
| Other race | 458 | 3.48% |
| Asian | 272 | 2.06% |
| Native American | 208 | 1.58% |
| Black or African American | 43 | 0.33% |
Boundary County 's average per capita income is $46,582. Household income levels show a median of $67,237. The poverty rate stands at 13.65%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $85,212 | - |
| Families | $75,721 | $98,475 |
| Households | $67,237 | $86,317 |
| Non Families | $32,847 | $48,461 |
Average Income
Median Household Income
Poverty Rate