Custer County's estimated 2025 population is 9,309 with a growth rate of 1.04% in the past year according to the most recent United States census data. Custer County is the 19th largest county in South Dakota. The 2010 population was 8,275 and has seen a growth of 12.5% since that time.
Data after 2023 is projected based on recent change
The racial composition of Custer County includes 90.86% White, and smaller percentages for Native American, Black or African American, Asian, other race, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Native American
Black or African American
Asian
Other race
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 7,892 | 90.86% |
| Two or more races | 543 | 6.25% |
| Native American | 159 | 1.83% |
| Black or African American | 32 | 0.37% |
| Asian | 31 | 0.36% |
| Other race | 29 | 0.33% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Custer County's average per capita income is $50,856. Household income levels show a median of $81,958. The poverty rate stands at 6.6%.
Name | Median | Mean |
|---|---|---|
| Married Families | $97,328 | - |
| Families | $93,986 | $128,685 |
| Households | $81,958 | $109,295 |
| Non Families | $40,907 | $58,537 |
Average Income
Median Household Income
Poverty Rate