How many people live in Walworth County, SD?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 5,300 people living in Walworth County, SD. That makes Walworth County the 34th-most populous county in South Dakota. It is home to 0.56% of people living in the state.
5.27K
population of Walworth County, SD (2024)
0.56%
County share of the South Dakota population (2024)
About 5,300 people lived in Walworth County, SD in 2024.
Population estimates, 2000–2024
What are Walworth County, SD’s age demographics?
About 1,300 Walworth County residents are aged 65 and older in 2024. That represents 24.4% of its population. For comparison, the age group represents 18.9% of South Dakota’s population and 18% in the US overall.
Another 1,300 Walworth County, SD residents, or 24.2% of the population, were children under 18. For comparison, the age group represents 24% of South Dakota’s population and 21.6% in the US overall.
A higher share of Walworth County, SD's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Walworth County, SD’s racial and ethnic demographics?
Non-Hispanic white residents make up 77.2% of the Walworth County population, higher than the national share of 57.5%. Walworth County also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (14%) than the US overall (0.72%).
In contrast, Walworth County’s Hispanic population accounts for 2.7%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 0.4% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Walworth County, SD has a higher share of a non-Hispanic American Indian and Alaska Native population than South Dakota as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Walworth County, SD is Mobridge with about 3,200 residents in 2024.
Cities and towns in Walworth County, SD ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Mobridge | 3,219 |
| 2. | Selby | 606 |
| 3. | Java | 120 |
| 4. | Glenham | 107 |
| 5. | Akaska | 82 |
| 6. | Lowry | 6 |
| 7. | Balance of Walworth County | 1,130 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
