King William County's estimated 2025 population is 20,032 with a growth rate of 2.57% in the past year according to the most recent United States census data. King William County is the 81st largest county in Virginia. The 2010 population was 15,999 and has seen a growth of 25.21% since that time.
Data after 2023 is projected based on recent change
The racial composition of King William County includes 78.6% White, 15.29% Black or African American, and smaller percentages for Native American, Asian, other race, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 14,330 | 78.6% |
| Black or African American | 2,788 | 15.29% |
| Two or more races | 807 | 4.43% |
| Native American | 143 | 0.78% |
| Asian | 120 | 0.66% |
| Other race | 34 | 0.19% |
| Native Hawaiian or Pacific Islander | 10 | 0.05% |
Married
Widowed
Divorced
Separated
Never Married
King William County's average per capita income is $53,855. Household income levels show a median of $85,212. The poverty rate stands at 7.9%.
Name | Median | Mean |
|---|---|---|
| Married Families | $115,553 | - |
| Families | $99,444 | $111,637 |
| Households | $85,212 | $97,561 |
| Non Families | $40,445 | $50,969 |
Average Income
Median Household Income
Poverty Rate