Lake County's 2026 population is estimated at 33,699, reflecting a 0.44% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Lake County is the 9th largest county in Montana. The 2010 population was 28,792 and has grown 17.04% since 2010.
Data after 2023 is projected based on recent change
Overall: 44.3 years
Female: 44.9 years
Male: 43.1 years
There are 25,394 adults, (7,894 of whom are seniors) in Lake County.
Female: 16,485 (50.6%)
Male: 16,076 (49.4%)
The racial composition of Lake County includes 65.62% White, 20.29% Native American, and smaller percentages for other race, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 21,367 | 65.62% |
| Native American | 6,608 | 20.29% |
| Two or more races | 3,952 | 12.14% |
| Other race | 287 | 0.88% |
| Asian | 218 | 0.67% |
| Black or African American | 71 | 0.22% |
| Native Hawaiian or Pacific Islander | 58 | 0.18% |
Lake County 's average per capita income is $41,126. Household income levels show a median of $63,360. The poverty rate stands at 17.24%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $93,132 | $122,994 |
| Families | $79,468 | $107,577 |
| Households | $63,360 | $90,243 |
| Non Families | $35,658 | $50,707 |
Average Income
Median Household Income
Poverty Rate
