Yankton County's estimated 2025 population is 23,727 with a growth rate of 0.44% in the past year according to the most recent United States census data. Yankton County is the 9th largest county in South Dakota. The 2010 population was 22,436 and has seen a growth of 5.75% since that time.
Data after 2023 is projected based on recent change
The racial composition of Yankton County includes 88.67% White, and smaller percentages for Native American, Black or African American, other race, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
White
Two or more races
Native American
Black or African American
Other race
Asian
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 20,731 | 88.67% |
| Two or more races | 1,425 | 6.1% |
| Native American | 549 | 2.35% |
| Black or African American | 362 | 1.55% |
| Other race | 245 | 1.05% |
| Asian | 67 | 0.29% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Yankton County's average per capita income is $46,570. Household income levels show a median of $73,855. The poverty rate stands at 9.36%.
Name | Median | Mean |
|---|---|---|
| Married Families | $104,735 | - |
| Families | $97,233 | $115,837 |
| Households | $73,855 | $94,056 |
| Non Families | $44,695 | $61,853 |
Average Income
Median Household Income
Poverty Rate