Yankton County's estimated 2026 population is 23,693 with a growth rate of 0.25% 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 5.6% since that time.
Data after 2023 is projected based on recent change
Overall: 42.5 years
Female: 44.9 years
Male: 41.2 years
There are 18,440 adults, (5,005 of whom are seniors) in Yankton County.
Female: 11,239 (48%)
Male: 12,175 (52%)
The racial composition of Yankton County includes 87.83% White, and smaller percentages for Native American, Black or African American, other race, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 20,564 | 87.83% |
| Two or more races | 1,464 | 6.25% |
| Native American | 643 | 2.75% |
| Black or African American | 385 | 1.64% |
| Other race | 283 | 1.21% |
| Asian | 75 | 0.32% |
Yankton County's average per capita income is $48,249. Household income levels show a median of $72,821. The poverty rate stands at 11.91%.
Name | Median | Mean |
|---|---|---|
| Married Families | $108,716 | - |
| Families | $97,374 | $115,423 |
| Households | $72,821 | $95,237 |
| Non Families | $45,152 | $64,527 |
Average Income
Median Household Income
Poverty Rate