King William County, Virginia
Located in Virginia, King William County has a population of 18,593 residents and a median age of 40.9 years, making it the #1,956 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 5.9%. The median home value is $315,700, and the median household income is $86,056, which is 15% above the national median.
Demographics
King William County has a population of 18,593, making it the #1,956 most populous county in the US. The median age is 40.9 years, which is 5.1% above 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 King William County is $86,056, ranking #405 out of 3,222 counties — 14.5% above the national median. The poverty rate is 5.9% and unemployment stands at 2.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in King William County is $315,700 (+12.0% vs national). Renters pay a median of $1,166/mo and the homeownership rate is 88.9%.
Median Home Value Trend
Rankings →Household Type
Education
In King William County, 23.0% of adults age 25+ hold a bachelor's degree or higher, which is 31.9% below the national average, ranking #1,506 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in King William County is 75.2 years. 17.6% of adults report poor or fair health and 7.1% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
17.0% of adults in King William County smoke , 38.5% are obese , and 21.8% report excessive drinking. The drug overdose death rate is 36.8 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 15.3 per 100,000. Motor vehicle deaths occur at a rate of 29.6 per 100,000.
Suicide Rate Trend
Families & Children
8.6% of children in King William County live in poverty . The teen birth rate is 12.9 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in King William County is 82.3%. The mean commute time is 40.2 min, which is 45.7% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, King William County voted Republican with a margin of 40.6%. The vote was 29.3% Dem / 69.9% Rep. Compared to 2020, the margin shifted 2.8 toward Republicans .
Vote Share Over Time
About King William County, Virginia
King William County, Virginia has a total population of 18,593, making it the 1,956th most populous county in the United States. The median age in King William County is 40.9 years, which is 5.1% above the national median of 38.9 years.
The median household income in King William County is $86,056, which ranks #405 of 3,222 counties nationwide. This is 14.5% above the national median of $75,149. The poverty rate is 5.9%, lower than the national rate of 12.6%. The unemployment rate stands at 2.3%.
The median home value in King William County is $315,700, 12.0% above the national median. Renters in King William County pay a median gross rent of $1,166 per month. The homeownership rate is 88.9%, compared to the national rate of 64.4%.
In King William County, 23.0% of residents aged 25 and older hold a bachelor's degree or higher, 31.9% below the national average of 33.7%. Health insurance coverage stands at 94.7% of the population. The average commute time for workers is 40.2 min.
King William County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 76.4% of the population, followed by Black (non-Hispanic) (15.0%) and Hispanic or Latino (3.3%).
All data for King William County, Virginia 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.