How many people live in Charles Mix County, SD?
Refreshed annually
In 2025, there were about 9,300 people living in Charles Mix County, SD. That makes Charles Mix County the 21st-most populous county in South Dakota. It is home to 0.99% of people living in the state.
9.3K
population of Charles Mix County, SD (2025)
0.99%
County share of the South Dakota population (2025)
About 9,300 people lived in Charles Mix County, SD in 2025.
Population estimates, 2000–2025
What are Charles Mix County, SD's age demographics?
About 1,900 Charles Mix County residents are aged 65 and older in 2024. That represents 19.9% 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 Charles Mix County residents, or 30.5% 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 Charles Mix County, SD's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Charles Mix County, SD's racial and ethnic demographics?
Non-Hispanic white residents make up 63.8% of the Charles Mix County, SD population, higher than the national share of 57.5%. Charles Mix County, SD also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (28.4%) than the US overall (0.72%).
In contrast, Charles Mix County’s Hispanic population accounts for 3.5%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 0.59% 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.
Charles Mix 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 Charles Mix County, SD is Wagner with about 1,400 residents in 2024.
Cities and towns in Charles Mix County, SD ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Wagner | 1,429 |
| 2. | Platte | 1,249 |
| 3. | Highland | 804 |
| 4. | White Swan | 739 |
| 5. | Lake Andes | 692 |
| 6. | Lawrence | 495 |
| 7. | Bryan | 392 |
| 8. | La Roche | 367 |
| 9. | Platte | 300 |
| 10. | Wahehe | 261 |
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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.
