Gallatin County's estimated 2026 population is 129,094 with a growth rate of 0.82% 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 43.98% 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 (89.67%)
Two or more races (5.78%)
Other race (2.03%)
Asian (1.28%)
Native American (0.75%)
Black or African American (0.49%)
Native Hawaiian or Pacific Islander (0%)
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
