King William County's estimated 2026 population is 19,955 with a growth rate of 1.72% in the past year according to the most recent United States census data. King William County is the 82nd largest county in Virginia. The 2010 population was 15,999 and has seen a growth of 24.73% since that time.
Data after 2023 is projected based on recent change
Overall: 40.9 years
Female: 41.8 years
Male: 38.3 years
There are 14,369 adults, (3,129 of whom are seniors) in King William County.
Female: 9,487 (51%)
Male: 9,106 (49%)
The racial composition of King William County includes 77.56% White, 15.03% Black or African American, and smaller percentages for Native American, other race, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 14,420 | 77.56% |
| Black or African American | 2,795 | 15.03% |
| Two or more races | 893 | 4.8% |
| Native American | 208 | 1.12% |
| Other race | 151 | 0.81% |
| Asian | 116 | 0.62% |
| Native Hawaiian or Pacific Islander | 10 | 0.05% |
King William County's average per capita income is $55,165. Household income levels show a median of $86,056. The poverty rate stands at 5.86%.
Name | Median | Mean |
|---|---|---|
| Married Families | $116,652 | - |
| Families | $98,408 | $112,183 |
| Households | $86,056 | $99,161 |
| Non Families | $43,750 | $55,189 |
Average Income
Median Household Income
Poverty Rate