How many people live in Roberts County, SD?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 10,300 people living in Roberts County, SD. That makes Roberts County the 18th-most populous county in South Dakota. It is home to 1.1% of people living in the state.
10.3K
population of Roberts County, SD (2024)
1.1%
County share of the South Dakota population (2024)
About 10,300 people lived in Roberts County, SD in 2024.
Population estimates, 2000–2024
What are Roberts County, SD’s age demographics?
About 2,200 Roberts County residents are aged 65 and older in 2024. That represents 21.2% of its population. For comparison, the age group represents 18.9% of South Dakota’s population and 18% in the US overall.
Another 2,900 Roberts County residents, or 28.6% 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 Roberts County, SD's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Roberts County, SD’s racial and ethnic demographics?
Non-Hispanic American Indian and Alaska Native residents make up 35.9% of the Roberts County, SD population, higher than the national share of 0.72%. Roberts County, SD also has a larger share of people identifying as non-Hispanic two or more races (4.1%) than the US overall (2.5%).
In contrast, Roberts County’s Hispanic population accounts for 3%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 0.67% 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.
Roberts 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 Roberts County, SD is Sisseton with about 2,400 residents in 2024.
Cities and towns in Roberts County, SD ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Sisseton | 2,432 |
| 2. | Goodwill | 916 |
| 3. | Sisseton | 787 |
| 4. | Wilmot | 426 |
| 5. | Long Hollow | 422 |
| 6. | Rosholt | 372 |
| 7. | Lockwood | 363 |
| 8. | Bryant | 344 |
| 9. | Agency | 311 |
| 10. | Geneseo | 294 |
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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.
