Sioux County, North Dakota Demographics 2026

Population Overview

Sioux County is located in North Dakota with a total population of 3,789. It is the 30th most populous county out of 53 in North Dakota. The county encompasses 3 Census-designated places.

Age Demographics

The median age in Sioux County is 28.7 years. This is 20% lower than the state median of 35.7 years. With 34.6% of the population under 18, Sioux County has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Sioux County is $41,676. This is 45% lower than the state median of $75,949. Compared to the national median of $78,538, household income here is 47% lower. The poverty rate stands at 42.7%. This is 304% higher than the state poverty rate of 10.6%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 21.5%. This is 658% higher than the state rate of 2.8%. The median home value is $87,400. Housing costs are 64% lower than the state median of $241,100. With a home-value-to-income ratio of just 2.1x, Sioux County is one of the most affordable housing markets in the area. 46.0% of occupied housing units are owner-occupied. This homeownership rate is 27% lower than the state average of 63.4%.

Race & Ethnicity

Sioux County is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. Hispanic or Latino residents account for 1.0%. The White (non-Hispanic) population (12.2%) is well below the state average of 82.5%. The Black or African American population (0.2%) is well below the state average of 3.2%. The Hispanic or Latino population (1.0%) is well below the state average of 4.5%.

Education

11.2% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 65% lower than the state rate of 32.3%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 86.9%.