Custer County's estimated 2026 population is 11,866 with a growth rate of -0.41% in the past year according to the most recent United States census data. Custer County is the 18th largest county in Montana. The 2010 population was 11,691 and has seen a growth of 1.5% since that time.
Data after 2023 is projected based on recent change
The racial composition of Custer County includes 91.22% White, and smaller percentages for Native American, other race, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
White (91.22%)
Two or more races (5.98%)
Native American (1.28%)
Other race (0.66%)
Asian (0.4%)
Black or African American (0.35%)
Native Hawaiian or Pacific Islander (0.1%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 10,890 | 91.22% |
| Two or more races | 714 | 5.98% |
| Native American | 153 | 1.28% |
| Other race | 79 | 0.66% |
| Asian | 48 | 0.4% |
| Black or African American | 42 | 0.35% |
| Native Hawaiian or Pacific Islander | 12 | 0.1% |
Married
Widowed
Divorced
Separated
Never Married
Custer County's average per capita income is $41,553. Household income levels show a median of $63,585. The poverty rate stands at 11.67%.
Name | Median | Mean |
|---|---|---|
| Married Families | $95,075 | - |
| Families | $90,000 | $105,272 |
| Households | $63,585 | $83,970 |
| Non Families | $33,883 | $48,054 |
Average Income
Median Household Income
Poverty Rate