Sioux County's estimated 2026 population is 3,617 with a growth rate of -1.36% in the past year according to the most recent United States census data. Sioux County is the 30th largest county in North Dakota. The 2010 population was 4,148 and has seen a growth of -12.8% since that time.
Data after 2023 is projected based on recent change
Overall: 28.2 years
Female: 28.8 years
Male: 26.3 years
There are 2,467 adults, (360 of whom are seniors) in Sioux County.
Female: 1,878 (50.2%)
Male: 1,862 (49.8%)
The racial composition of Sioux County includes 82.83% Native American, 12.43% White, and smaller percentages for Two or more races, other race, Asian, Black or African American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| Native American | 3,098 | 82.83% |
| White | 465 | 12.43% |
| Two or more races | 95 | 2.54% |
| Other race | 43 | 1.15% |
| Asian | 25 | 0.67% |
| Black or African American | 14 | 0.37% |
Sioux County's average per capita income is $43,205. Household income levels show a median of $42,083. The poverty rate stands at 43.29%.
Name | Median | Mean |
|---|---|---|
| Married Families | $80,000 | - |
| Families | $45,568 | $70,096 |
| Households | $42,083 | $65,479 |
| Non Families | $34,129 | $47,957 |
Average Income
Median Household Income
Poverty Rate