Stillwater County's estimated 2025 population is 9,181 with a growth rate of 0.04% in the past year according to the most recent United States census data. Stillwater County is the 25th largest county in Montana. The 2010 population was 9,112 and has seen a growth of 0.76% since that time.
Data after 2023 is projected based on recent change
The racial composition of Stillwater County includes 93.28% White, and smaller percentages for other race, Asian, Native American, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Other race
Asian
Native American
Black or African American
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 8,444 | 93.28% |
| Two or more races | 433 | 4.78% |
| Other race | 101 | 1.12% |
| Asian | 33 | 0.36% |
| Native American | 32 | 0.35% |
| Black or African American | 9 | 0.1% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Stillwater County's average per capita income is $50,430. Household income levels show a median of $81,503. The poverty rate stands at 8.25%.
Name | Median | Mean |
|---|---|---|
| Married Families | $107,557 | - |
| Families | $101,688 | $130,282 |
| Households | $81,503 | $111,489 |
| Non Families | $43,409 | $72,182 |
Average Income
Median Household Income
Poverty Rate
