Gallatin County's estimated 2025 population is 129,351 with a growth rate of 1.15% in the past year according to the most recent United States census data. Gallatin County is the 2nd largest county in Montana. The 2010 population was 89,662 and has seen a growth of 44.27% since that time.
Data after 2023 is projected based on recent change
The racial composition of Gallatin County includes 89.67% 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 | 109,567 | 89.67% |
| Two or more races | 7,066 | 5.78% |
| Other race | 2,483 | 2.03% |
| Asian | 1,563 | 1.28% |
| Native American | 920 | 0.75% |
| Black or African American | 593 | 0.49% |
| Native Hawaiian or Pacific Islander | 2 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Gallatin County's average per capita income is $53,658. Household income levels show a median of $87,454. The poverty rate stands at 10.21%.
Name | Median | Mean |
|---|---|---|
| Married Families | $122,666 | $165,959 |
| Families | $111,714 | $152,110 |
| Households | $87,454 | $124,551 |
| Non Families | $60,156 | $84,071 |
Average Income
Median Household Income
Poverty Rate
