Custer County's estimated 2026 population is 9,538 with a growth rate of 1.13% 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 15.26% since that time.
Data after 2023 is projected based on recent change
Overall: 57.6 years
Female: 55.9 years
Male: 58.2 years
There are 7,667 adults, (2,997 of whom are seniors) in Custer County.
Female: 4,520 (50.8%)
Male: 4,372 (49.2%)
The racial composition of Custer County includes 88.87% White, and smaller percentages for Native American, other race, Asian, Black or African American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 7,902 | 88.87% |
| Two or more races | 612 | 6.88% |
| Native American | 177 | 1.99% |
| Other race | 133 | 1.5% |
| Asian | 39 | 0.44% |
| Black or African American | 29 | 0.33% |
Custer County's average per capita income is $50,621. Household income levels show a median of $84,112. The poverty rate stands at 8.97%.
Name | Median | Mean |
|---|---|---|
| Married Families | $99,442 | - |
| Families | $97,876 | $123,429 |
| Households | $84,112 | $110,413 |
| Non Families | $40,652 | $77,154 |
Average Income
Median Household Income
Poverty Rate