How many people live in Sioux County, ND?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 3,700 people living in Sioux County, ND. That makes Sioux County the 29th-most populous county in North Dakota. It is home to 0.46% of people living in the state.
3.71K
population of Sioux County, ND (2024)
0.46%
County share of the North Dakota population (2024)
About 3,700 people lived in Sioux County, ND in 2024.
Population estimates, 2000–2024
What are Sioux County, ND’s age demographics?
About 370 Sioux County, ND residents are aged 65 and older in 2024. That represents 10% of its population. For comparison, the age group represents 17.5% of North Dakota’s population and 18% in the US overall.
Another 1,200 Sioux County, ND residents, or 33.3% of the population, were children under 18. For comparison, the age group represents 23.5% of North Dakota’s population and 21.6% in the US overall.
A higher share of Sioux County, ND's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Sioux County, ND’s racial and ethnic demographics?
Non-Hispanic American Indian and Alaska Native residents make up 78.2% of the Sioux County, ND population, higher than the national share of 0.72%. Sioux County, ND also has a larger share of people identifying as non-Hispanic two or more races (4.6%) than the US overall (2.5%).
In contrast, Sioux County’s non-Hispanic white population accounts for 13%, below the 57.5% nationwide, and the Hispanic population makes up 3.2% of the county, compared with 20% 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.
Sioux County, ND has a higher share of a non-Hispanic American Indian and Alaska Native population than North Dakota as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Sioux County, ND is Fort Yates UT with about 1,900 residents in 2024.
Cities and towns in Sioux County, ND ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Fort Yates UT | 1,940 |
| 2. | North Sioux UT | 1,180 |
| 3. | Southwest Sioux UT | 216 |
| 4. | Fort Yates | 172 |
| 5. | Selfridge | 121 |
| 6. | Solen | 67 |
| 7. | Menz | 17 |
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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.
