Williams County, North Dakota Demographics 2026

Population Overview

Williams County is located in North Dakota with a total population of 39,368. It is the 5th most populous county out of 53 in North Dakota. The county encompasses 8 Census-designated places.

Age Demographics

The median age in Williams County is 32.3 years. This is 10% lower than the state median of 35.7 years. With 30.0% of the population under 18, Williams County has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Williams County is $90,224. This is 19% higher than the state median of $75,949. Compared to the national median of $78,538, household income here is 15% higher. The poverty rate stands at 8.8%. This is 17% lower than the state poverty rate of 10.6%. The unemployment rate is 2.5%. This is 10% lower than the state rate of 2.8%. The median home value is $267,800. Housing costs are 11% higher than the state median of $241,100. The home-value-to-income ratio is 3.0x. 57.2% of occupied housing units are owner-occupied. This homeownership rate is 10% lower than the state average of 63.4%.

Race & Ethnicity

The largest racial or ethnic group in Williams County is White (non-Hispanic), making up 76.7% of the population. Hispanic or Latino residents account for 9.7%. The Black or African American population is significantly higher than the state average (5.2% vs 3.2%). The Hispanic or Latino population is significantly higher than the state average (9.7% vs 4.5%).

Education

23.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 26% 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 90.6%.