Flathead County's 2026 population is estimated at 116,591, reflecting a 0.89% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Flathead County is the 4th largest county in Montana. The 2010 population was 90,863 and has grown 28.32% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.2 years
Female: 43 years
Male: 41.5 years
There are 86,747 adults, (23,352 of whom are seniors) in Flathead County.
Female: 55,203 (49.9%)
Male: 55,492 (50.1%)
The racial composition of Flathead County includes 91.09% White, and smaller percentages for other race, Native American, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 100,831 | 91.09% |
| Two or more races | 6,705 | 6.06% |
| Other race | 1,012 | 0.91% |
| Native American | 976 | 0.88% |
| Asian | 931 | 0.84% |
| Black or African American | 236 | 0.21% |
| Native Hawaiian or Pacific Islander | 4 | 0% |
Flathead County 's average per capita income is $46,146. Household income levels show a median of $73,925. The poverty rate stands at 9.32%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $103,730 | $131,756 |
| Families | $93,578 | $120,679 |
| Households | $73,925 | $99,728 |
| Non Families | $39,901 | $58,664 |
Average Income
Median Household Income
Poverty Rate
