Custer County's estimated 2026 population is 12,091 with a growth rate of 0.47% in the past year according to the most recent United States census data. Custer County is the 17th largest county in Montana. The 2010 population was 11,691 and has seen a growth of 3.42% since that time.
Data after 2023 is projected based on recent change
Overall: 42.7 years
Female: 44.2 years
Male: 42.4 years
There are 9,592 adults, (2,482 of whom are seniors) in Custer County.
Female: 5,939 (49.7%)
Male: 6,022 (50.3%)
The racial composition of Custer County includes 90.44% White, and smaller percentages for Native American, other race, Asian, Black or African American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 10,817 | 90.44% |
| Two or more races | 798 | 6.67% |
| Native American | 220 | 1.84% |
| Other race | 68 | 0.57% |
| Asian | 54 | 0.45% |
| Black or African American | 4 | 0.03% |
Custer County's average per capita income is $42,436. Household income levels show a median of $70,605. The poverty rate stands at 11.34%.
Name | Median | Mean |
|---|---|---|
| Married Families | $100,476 | - |
| Families | $92,841 | $103,556 |
| Households | $70,605 | $85,295 |
| Non Families | $36,214 | $51,614 |
Average Income
Median Household Income
Poverty Rate