Yellowstone County's estimated 2025 population is 172,789 with a growth rate of 0.57% in the past year according to the most recent United States census data. Yellowstone County is the largest county in Montana. The 2010 population was 148,405 and has seen a growth of 16.43% since that time.
Data after 2023 is projected based on recent change
The racial composition of Yellowstone County includes 86.77% White, 4% Native American, and smaller percentages for other race, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Native American
Other race
Black or African American
Asian
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 145,204 | 86.77% |
| Two or more races | 9,781 | 5.84% |
| Native American | 6,694 | 4% |
| Other race | 2,739 | 1.64% |
| Black or African American | 1,466 | 0.88% |
| Asian | 1,380 | 0.82% |
| Native Hawaiian or Pacific Islander | 76 | 0.05% |
Married
Widowed
Divorced
Separated
Never Married
Yellowstone County's average per capita income is $47,924. Household income levels show a median of $74,400. The poverty rate stands at 10.23%.
Name | Median | Mean |
|---|---|---|
| Married Families | $109,602 | $142,312 |
| Families | $94,167 | $123,455 |
| Households | $74,400 | $102,308 |
| Non Families | $45,452 | $63,281 |
Average Income
Median Household Income
Poverty Rate
