Williams County, North Dakota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 5th-largest in North Dakota
The population of Williams County, North Dakota is 39,368 as of the 2023 American Community Survey, making it the 5th-largest county in North Dakota. The median household income is $90,224, the median home value is $267,800, and the median age is 32.3.
The population of Williams County has grown 80.4% since 2010 (22,591 → 40,763), a +4.31% annualized rate.
39,368
Population
+4.31%
Annual growth
19
People / sq mi
$90,224
Median Income
$267,800
Median Home Value
Williams County covers 2,078 sq mi of land at 18.9 people per square mile.
About Williams County, ND
Williams County is a county in North Dakota with a population of 39,368. It ranks #5 among counties in North Dakota by population. The median age is 32.3, younger than the national median. The population is 53.0% male and 47.0% female.
The median household income in Williams County is $90,224, above the US median of $74,580. 5.7% of residents live below the federal poverty level. Home values sit at a median of $267,800, with monthly rent averaging $1,108. The homeownership rate of 57.2% is lower than the national rate of 64.8%.
Educational attainment in Williams County reflects 23.7% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 3.2% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 18.7 minutes each way.
Williams County Population History (2010-2024)
The county of Williams County had a population of 22,591 in 2010 and 40,763 in 2024, a 80.4% growth over 14 years. The peak was 41,189 in 2020. Average annual growth rate: 4.45%.
40,763
Population (2024)
22,591
Population (2010)
41,189
Peak (2020)
4.45%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 22,591 |
| 2011 | 24,417 |
| 2012 | 26,755 |
| 2013 | 29,623 |
| 2014 | 32,166 |
| 2015 | 35,379 |
| 2016 | 34,286 |
| 2017 | 33,639 |
| 2018 | 35,698 |
| 2019 | 37,897 |
| 2020 | 41,189 |
| 2021 | 38,506 |
| 2022 | 38,012 |
| 2023 | 39,304 |
| 2024 | 40,763 |
Race & Ethnicity
| White | 81.3% |
| Black or African American | 5.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 5.9% |
| Two or More Races | 0.0% |
Age & Sex
32.3
Median Age
47.0%
Female
53.0%
Male
9.9%
Age 65+
Age Distribution
Children (under 15): 26.3% · Seniors (65+): 9.9%
Income & Poverty
| Median household income | $90,224+$14,275 vs state |
| Mean household income | $119,610 |
| Per-capita income | $45,793 |
| Poverty rate | 5.7%-0.5% vs state |
| Unemployment rate | 1.9% |
| Employment-to-population | 71.1% |
Top Industries by Employment
The largest employment sector in Williams County is professional & business services, accounting for 25.0% of workers.
How residents commute
0.2%
Drive alone
3.4%
Carpool
83.3%
Public transit
3.2%
Work from home
18.7 min
Avg commute
Housing
$267,800+$26,700 vs state
Median home value
$1,108
Median rent
57.2%
Homeownership rate
20,291
Total housing units
75.4%
Occupied
24.6%
Vacant
42.8%
Renter-occupied
Social & access
88.3%
With health insurance
95.2%
With broadband internet
46.9%
Foreign-born
8.8%
Veterans (18+)
11.2%
With a disability
89.8%
Speak language other than English at home
Education
90.6%
High School+
23.7%
Bachelor's+
Largest cities in North Dakota
Other counties in North Dakota
Part of North Dakota
Metro areas in North Dakota
County rankings
Frequently Asked Questions
Williams County, North Dakota has a population of 39,368 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 5th-largest county in North Dakota. Population density is 19 people per square mile.
The population of Williams County has grown 80.4% since 2010 (22,591 → 40,763), a +4.31% annualized rate.
The median household income in Williams County, North Dakota is $90,224, with mean (average) household income of $119,610 and per-capita income of $45,793. 5.7% of residents live below the federal poverty level.
In Williams County, the largest racial and ethnic groups are White (81.3%), Hispanic or Latino (5.9%), Black or African American (5.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Williams County, North Dakota is 32.3 years. Residents are 47.0% female and 53.0% male.
The median home value in Williams County is $267,800 and median monthly rent is $1,108. 57.2% of occupied housing units are owner-occupied. The county has 20,291 total housing units, 24.6% of which are vacant.
The largest employment sector in Williams County, North Dakota is professional, scientific, and management services, employing 25.0% of workers. The unemployment rate is 1.9%.
Fargo is among the largest cities associated with Williams County, North Dakota, with a population of 129,064.
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Full rankings of North Dakota counties
Statewide data for North Dakota
Population, race, income, age, and trends across North Dakota
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.