Stanley County's estimated 2026 population is 3,035 with a growth rate of 0.56% in the past year according to the most recent United States census data. Stanley County is the 47th largest county in South Dakota. The 2010 population was 2,972 and has seen a growth of 2.12% since that time.
Data after 2023 is projected based on recent change
Overall: 44.5 years
Female: 48.7 years
Male: 43.2 years
There are 2,376 adults, (735 of whom are seniors) in Stanley County.
Female: 1,383 (45.9%)
Male: 1,632 (54.1%)
The racial composition of Stanley County includes 88.06% White, and smaller percentages for Native American, other race, Black or African American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 2,655 | 88.06% |
| Two or more races | 247 | 8.19% |
| Native American | 78 | 2.59% |
| Other race | 32 | 1.06% |
| Black or African American | 3 | 0.1% |
Stanley County's average per capita income is $56,840. Household income levels show a median of $87,712. The poverty rate stands at 5.07%.
Name | Median | Mean |
|---|---|---|
| Married Families | $125,469 | - |
| Families | $113,750 | $117,475 |
| Households | $87,712 | $96,262 |
| Non Families | $40,385 | $51,104 |
Average Income
Median Household Income
Poverty Rate