Sioux County, North Dakota
Located in North Dakota, Sioux County has a population of 3,740 residents and a median age of 28.2 years, making it the #2,981 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 43.3%. The median home value is $85,400, and the median household income is $42,083, which is 44% below the national median.
Demographics
Sioux County has a population of 3,740, making it the #2,981 most populous county in the US. The median age is 28.2 years, which is 27.5% below the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Sioux County is $42,083, ranking #3,027 out of 3,222 counties — 44.0% below the national median. The poverty rate is 43.3% and unemployment stands at 17.0%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Sioux County is $85,400 (-69.7% vs national). Renters pay a median of $444/mo and the homeownership rate is 46.6%.
Median Home Value Trend
Rankings →Household Type
Education
In Sioux County, 16.3% of adults age 25+ hold a bachelor's degree or higher, which is 51.8% below the national average, ranking #2,623 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Sioux County is 59.6 years. 36.8% of adults report poor or fair health and 7.0% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
36.8% of adults in Sioux County smoke , 49.4% are obese , and 18.9% report excessive drinking. The drug overdose death rate is 86.0 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 55.8 per 100,000. Motor vehicle deaths occur at a rate of 48.2 per 100,000.
Suicide Rate Trend
Families & Children
39.3% of children in Sioux County live in poverty . The teen birth rate is 44.4 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Sioux County is 42.0%. The mean commute time is 20.0 min, which is 27.4% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Sioux County voted Democratic with a margin of 38.8%. The vote was 68.8% Dem / 30% Rep. Compared to 2020, the margin shifted 7.2 toward Republicans .
Vote Share Over Time
About Sioux County, North Dakota
Sioux County, North Dakota has a total population of 3,740, making it the 2,981st most populous county in the United States. The median age in Sioux County is 28.2 years, which is 27.5% below the national median of 38.9 years.
The median household income in Sioux County is $42,083, which ranks #3,027 of 3,222 counties nationwide. This is 44.0% below the national median of $75,149. The poverty rate is 43.3%, higher than the national rate of 12.6%. The unemployment rate stands at 17.0%.
The median home value in Sioux County is $85,400, 69.7% below the national median. Renters in Sioux County pay a median gross rent of $444 per month. The homeownership rate is 46.6%, compared to the national rate of 64.4%.
In Sioux County, 16.3% of residents aged 25 and older hold a bachelor's degree or higher, 51.8% below the national average of 33.7%. Health insurance coverage stands at 78.9% of the population. The average commute time for workers is 20.0 min.
Sioux County is a diverse community. The largest racial or ethnic group is American Indian (non-Hispanic) at 82.4% of the population, followed by White (non-Hispanic) (12.1%) and Two or More Races (2.2%).
All data for Sioux County, North Dakota comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.