Williams County, North Dakota
Located in North Dakota, Williams County has a population of 39,555 residents and a median age of 31.8 years, making it the #1,220 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 8.6%. The median home value is $284,800, and the median household income is $85,595, which is 14% above the national median.
Demographics
Williams County has a population of 39,555, making it the #1,220 most populous county in the US. The median age is 31.8 years, which is 18.3% 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 Williams County is $85,595, ranking #408 out of 3,222 counties — 13.9% above the national median. The poverty rate is 8.6% and unemployment stands at 4.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Williams County is $284,800 (+1.0% vs national). Renters pay a median of $1,123/mo and the homeownership rate is 53.0%.
Median Home Value Trend
Rankings →Household Type
Education
In Williams County, 24.4% of adults age 25+ hold a bachelor's degree or higher, which is 27.6% below the national average, ranking #1,310 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Williams County is 77.9 years. 15.9% of adults report poor or fair health and 9.9% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
17.4% of adults in Williams County smoke , 37.7% are obese , and 26.1% report excessive drinking. The drug overdose death rate is 17.4 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Williams County is 4.3 per 100,000 and the suicide rate is 29.0 per 100,000. Motor vehicle deaths occur at a rate of 18.0 per 100,000.
Suicide Rate Trend
Families & Children
8.6% of children in Williams County live in poverty and the infant mortality rate is 4.0 per 1,000 live births. The teen birth rate is 26.6 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Williams County is 59.0%. The mean commute time is 21.4 min, which is 22.3% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Williams County voted Republican with a margin of 68.1%. The vote was 15.2% Dem / 83.3% Rep. Compared to 2020, the margin shifted 1.3 toward Republicans .
Vote Share Over Time
About Williams County, North Dakota
Williams County, North Dakota has a total population of 39,555, making it the 1,220th most populous county in the United States. The median age in Williams County is 31.8 years, which is 18.3% below the national median of 38.9 years.
The median household income in Williams County is $85,595, which ranks #408 of 3,222 counties nationwide. This is 13.9% above the national median of $75,149. The poverty rate is 8.6%, lower than the national rate of 12.6%. The unemployment rate stands at 4.3%.
The median home value in Williams County is $284,800, 1.0% above the national median. Renters in Williams County pay a median gross rent of $1,123 per month. The homeownership rate is 53.0%, compared to the national rate of 64.4%.
In Williams County, 24.4% of residents aged 25 and older hold a bachelor's degree or higher, 27.6% below the national average of 33.7%. Health insurance coverage stands at 88.5% of the population. The average commute time for workers is 21.4 min.
Williams County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 75.7% of the population, followed by Hispanic or Latino (10.2%) and Two or More Races (5.2%).
All data for Williams 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.