Yankton County's estimated 2026 population is 23,509 with a growth rate of 0% 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 4.78% 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 and multiracial populations.
White (88.67%)
Two or more races (6.1%)
Native American (2.35%)
Black or African American (1.55%)
Other race (1.05%)
Asian (0.29%)
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% |
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