Granite County's estimated 2026 population is 3,676 with a growth rate of 1.02% in the past year according to the most recent United States census data. Granite County is the 40th largest county in Montana. The 2010 population was 3,073 and has seen a growth of 19.62% since that time.
Data after 2023 is projected based on recent change
The racial composition of Granite County includes 92.72% White, and smaller percentages for Native American, Black or African American, Asian, other race, Native Hawaiian or Pacific Islander and multiracial populations.
White (92.72%)
Two or more races (3.01%)
Native American (2.22%)
Black or African American (0.73%)
Asian (0.64%)
Other race (0.64%)
Native Hawaiian or Pacific Islander (0.03%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 3,170 | 92.72% |
| Two or more races | 103 | 3.01% |
| Native American | 76 | 2.22% |
| Black or African American | 25 | 0.73% |
| Asian | 22 | 0.64% |
| Other race | 22 | 0.64% |
| Native Hawaiian or Pacific Islander | 1 | 0.03% |
Married
Widowed
Divorced
Separated
Never Married
Granite County's average per capita income is $35,747. Household income levels show a median of $54,646. The poverty rate stands at 10.43%.
Name | Median | Mean |
|---|---|---|
| Married Families | $73,878 | - |
| Families | $72,596 | $98,793 |
| Households | $54,646 | $80,224 |
| Non Families | $34,315 | $44,649 |
Average Income
Median Household Income
Poverty Rate