Sioux County's estimated 2026 population is 3,821 with a growth rate of 1.43% in the past year according to the most recent United States census data. Sioux County is the 27th largest county in North Dakota. The 2010 population was 4,148 and has seen a growth of -7.88% since that time.
Data after 2023 is projected based on recent change
The racial composition of Sioux County includes 84.3% Native American, 12.35% White, and smaller percentages for Two or more races, other race, Black or African American and multiracial populations.
Native American (84.3%)
White (12.35%)
Two or more races (2.24%)
Other race (0.92%)
Black or African American (0.18%)
Race | Population | Percentage (of total) |
|---|---|---|
| Native American | 3,194 | 84.3% |
| White | 468 | 12.35% |
| Two or more races | 85 | 2.24% |
| Other race | 35 | 0.92% |
| Black or African American | 7 | 0.18% |
Married
Widowed
Divorced
Separated
Never Married
Sioux County's average per capita income is $40,247. Household income levels show a median of $41,676. The poverty rate stands at 42.74%.
Name | Median | Mean |
|---|---|---|
| Married Families | $71,912 | - |
| Families | $42,500 | $65,710 |
| Households | $41,676 | $64,425 |
| Non Families | $33,750 | $54,833 |
Average Income
Median Household Income
Poverty Rate