Yankton County, South Dakota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 9th-largest in South Dakota
The population of Yankton County, South Dakota is 23,379 as of the 2023 American Community Survey, making it the 9th-largest county in South Dakota. The median household income is $73,855, the median home value is $208,200, and the median age is 42.2.
The population of Yankton County has grown 4.8% since 2010 (22,436 → 23,509), a +0.33% annualized rate.
23,379
Population
+0.33%
Annual growth
45
People / sq mi
$73,855
Median Income
$208,200
Median Home Value
Yankton County covers 521 sq mi of land at 44.9 people per square mile.
About Yankton County, SD
Yankton County is a county in South Dakota with a population of 23,379. It ranks #9 among counties in South Dakota by population. The median age is 42.2, older than the national median. The population is 52.1% male and 47.9% female.
The median household income in Yankton County is $73,855, near the US median of $74,580. 5.5% of residents live below the federal poverty level. Home values sit at a median of $208,200, with monthly rent averaging $777. The homeownership rate of 72.3% is higher than the national rate of 64.8%.
Educational attainment in Yankton County reflects 27.7% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 5.5% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 15.0 minutes each way.
Yankton County Population History (2010-2024)
The county of Yankton County had a population of 22,436 in 2010 and 23,509 in 2024, a 4.8% growth over 14 years. The peak was 23,509 in 2023. Average annual growth rate: 0.34%.
23,509
Population (2024)
22,436
Population (2010)
23,509
Peak (2023)
0.34%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 22,436 |
| 2011 | 22,507 |
| 2012 | 22,594 |
| 2013 | 22,654 |
| 2014 | 22,695 |
| 2015 | 22,702 |
| 2016 | 22,653 |
| 2017 | 22,691 |
| 2018 | 22,807 |
| 2019 | 22,837 |
| 2020 | 23,286 |
| 2021 | 23,358 |
| 2022 | 23,407 |
| 2023 | 23,509 |
| 2024 | 23,509 |
Race & Ethnicity
| White | 88.7% |
| Black or African American | 1.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 4.8% |
| Two or More Races | 0.0% |
Age & Sex
42.2
Median Age
47.9%
Female
52.1%
Male
20.5%
Age 65+
Age Distribution
Children (under 15): 17.5% · Seniors (65+): 20.5%
Income & Poverty
| Median household income | $73,855+$1,434 vs state |
| Mean household income | $94,056 |
| Per-capita income | $39,880 |
| Poverty rate | 5.5%-1.9% vs state |
| Unemployment rate | 1.0% |
| Employment-to-population | 61.1% |
Top Industries by Employment
The largest employment sector in Yankton County is professional & business services, accounting for 26.9% of workers.
How residents commute
1.1%
Drive alone
3.2%
Carpool
79.5%
Public transit
5.5%
Work from home
15.0 min
Avg commute
Housing
$208,200$-28,600 vs state
Median home value
$777
Median rent
72.3%
Homeownership rate
10,497
Total housing units
93.3%
Occupied
6.7%
Vacant
27.7%
Renter-occupied
Social & access
93.7%
With health insurance
92.2%
With broadband internet
34.7%
Foreign-born
8.4%
Veterans (18+)
14.2%
With a disability
94.5%
Speak language other than English at home
Education
92.7%
High School+
27.7%
Bachelor's+
Largest cities in South Dakota
Other counties in South Dakota
Part of South Dakota
Metro areas in South Dakota
County rankings
Frequently Asked Questions
Yankton County, South Dakota has a population of 23,379 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 9th-largest county in South Dakota. Population density is 45 people per square mile.
The population of Yankton County has grown 4.8% since 2010 (22,436 → 23,509), a +0.33% annualized rate.
The median household income in Yankton County, South Dakota is $73,855, with mean (average) household income of $94,056 and per-capita income of $39,880. 5.5% of residents live below the federal poverty level.
In Yankton County, the largest racial and ethnic groups are White (88.7%), Hispanic or Latino (4.8%), Black or African American (1.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Yankton County, South Dakota is 42.2 years. Residents are 47.9% female and 52.1% male.
The median home value in Yankton County is $208,200 and median monthly rent is $777. 72.3% of occupied housing units are owner-occupied. The county has 10,497 total housing units, 6.7% of which are vacant.
The largest employment sector in Yankton County, South Dakota is professional, scientific, and management services, employing 26.9% of workers. The unemployment rate is 1.0%.
Sioux Falls is among the largest cities associated with Yankton County, South Dakota, with a population of 197,642.
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Statewide data for South Dakota
Population, race, income, age, and trends across South Dakota
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.