Williams County is home to 39,555 people in North Dakota. The population has more than doubled since 2000, adding 19,794 people. This skews young, with a median age of 31.8. That puts it in the top 3% of US counties for household income. About 24% of adults have finished a four-year degree. 53% of homes are owner-occupied.
At a glance
Average income
median household income $85,595, near the US median
US median: $82,259
Younger
median age 31.8
US median: 38.9
Less educated
24% hold a bachelor's degree
US average: 36%
Less affordable
home values up 192%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Williams County
What changed most since 1990
Median home value (2024 dollars)$102,483 → $284,800(+178%)US over the same years: +67%
Homes owned by their occupants70.7% → 53.0%(−17.8 pts)US over the same years: +0.9 pts
Population21,129 → 39,555(+87%)US over the same years: +35%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)55.5%(1,220)
US avg: 26.4%
Gulf War (1990s)20.5%(451)
US avg: 24.3%
Vietnam era14.4%(316)
US avg: 33.1%
Korean War1.6%(36)
US avg: 4.5%
World War II0.2%(4)
US avg: 1%
Share of the 2,199 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Williams County, decade by decade
Williams County population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
21,129
$55,799
$102,483
14.3%
12.0
2000
19,761
$57,366
$97,459
16.5%
17.9
2010
22,398
$79,691
$134,938
19.3%
21.0
2020
40,950
$96,367
$308,828
25.6%
52.3
2024
39,555
$85,595
$284,800
24.4%
51.0
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
How many people live in Williams County, North Dakota?
Williams County, North Dakota has about 39,555 residents according to the 2024 American Community Survey.
What is the median household income in Williams County, North Dakota?
The typical household in Williams County, North Dakota earns about $85,595 a year. Half of households make more than that, and half make less.
Is Williams County, North Dakota expensive?
In Williams County, North Dakota, the median home is worth about $284,800, and the typical rent is about $1,123 a month.
How educated are people in Williams County, North Dakota?
About 24.4% of adults age 25 and over in Williams County, North Dakota hold a bachelor's degree or higher.
What is the poverty rate in Williams County, North Dakota?
About 8.6% of people in Williams County, North Dakota live below the federal poverty line.
Has Williams County, North Dakota grown since 1990?
Yes, Williams County, North Dakota has grown since 1990. The population has added about 18,426 residents, a change of about 87 percent over that period.
