Yankton County, South Dakota
Located in South Dakota, Yankton County has a population of 23,414 residents and a median age of 42.5 years, making it the #1,714 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 11.9%. The median home value is $225,900, and the median household income is $72,821, which is 3% below the national median.
Demographics
Yankton County has a population of 23,414, making it the #1,714 most populous county in the US. The median age is 42.5 years, which is 9.3% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Yankton County is $72,821, ranking #986 out of 3,222 counties — 3.1% below the national median. The poverty rate is 11.9% and unemployment stands at 1.4%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Yankton County is $225,900 (-19.9% vs national). Renters pay a median of $781/mo and the homeownership rate is 72.7%.
Median Home Value Trend
Rankings →Household Type
Education
In Yankton County, 31.4% of adults age 25+ hold a bachelor's degree or higher, which is 6.7% below the national average, ranking #659 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Yankton County is 79.2 years. 12.7% of adults report poor or fair health and 10.1% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
15.5% of adults in Yankton County smoke , 35.3% are obese , and 23.5% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 7.4 per 100,000. Motor vehicle deaths occur at a rate of 16.8 per 100,000.
Suicide Rate Trend
Families & Children
12.2% of children in Yankton County live in poverty . The teen birth rate is 14.7 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Yankton County is 61.8%. The mean commute time is 16.8 min, which is 39.3% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Yankton County voted Republican with a margin of 25.6%. The vote was 35.8% Dem / 61.4% Rep. Compared to 2020, the margin shifted 2.0 toward Republicans .
Vote Share Over Time
About Yankton County, South Dakota
Yankton County, South Dakota has a total population of 23,414, making it the 1,714th most populous county in the United States. The median age in Yankton County is 42.5 years, which is 9.3% above the national median of 38.9 years.
The median household income in Yankton County is $72,821, which ranks #986 of 3,222 counties nationwide. This is 3.1% below the national median of $75,149. The poverty rate is 11.9%, lower than the national rate of 12.6%. The unemployment rate stands at 1.4%.
The median home value in Yankton County is $225,900, 19.9% below the national median. Renters in Yankton County pay a median gross rent of $781 per month. The homeownership rate is 72.7%, compared to the national rate of 64.4%.
In Yankton County, 31.4% of residents aged 25 and older hold a bachelor's degree or higher, 6.7% below the national average of 33.7%. Health insurance coverage stands at 94.4% of the population. The average commute time for workers is 16.8 min.
Yankton County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 86.9% of the population, followed by Hispanic or Latino (5.9%) and Two or More Races (3.3%).
All data for Yankton County, South Dakota comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.