King William County: Demographics & People
About 18,593 people live in King William County, in 7,352 households. Median age 40.9 years. (3.1y older than Virginia). Population is 15% Black and 3% Hispanic or Latino. County is gaining 918 residents per year (2022-2023). County health: 39% adult obesity, 16% smoke.
- 2.5 people per household (vs Virginia avg 2.6).
- 65 dependents per 100 working-age (youth + seniors / 18-64) (vs Virginia 62).
Population & Trend
Current population 18,593; figures track the most recent Census ACS 5-year estimates.
| Population | 18,593 people (vs Virginia 42,214) |
|---|---|
| Total Town Population | 5,500 people |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Age Distribution
Median age 40.9y is 2.0 years older than the U.S. median (38.9y).
| Age Summary · Total Pop | 18,593 |
|---|---|
| Age Summary · Under 18 | 4,224 |
| Age Summary · 18 To 34 | 3,928.0× |
| Age Summary · 35 To 64 | 7,312.0× |
| Age Summary · 65 Plus | 3,129 |
| Age Summary · Pct Under 18 | 22.7% |
| Age Summary · Pct 18 To 34 | 21.1% |
| Age Summary · Pct 35 To 64 | 39.3% |
| Median age | 40.9 years (vs Virginia 37.8y) |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 18,593 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups).
| Census Demographics · Total Population | 18,593 people |
|---|---|
| White residents | 14,420 |
| Black residents | 2,795 |
| Asian residents | 116 |
| Census Demographics · Aian | 208 |
| Census Demographics · Nhpi | 10 |
| Census Demographics · Other Race | 151 |
| Census Demographics · Two Or More Races | 893 |
| Diversity Index | 37.3% |
| Asian population | 0.6% (vs Virginia 5.6%) |
| Black population | 15.0% (vs Virginia 18.2%) |
| Hispanic or Latino population | 3.3% (vs Virginia 10.1%) |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 11.6% are foreign-born — below the U.S. average of 13.9%.
| Census Citizenship · Total | 18,593 |
|---|---|
| Census Citizenship · Native | 18,155 |
| Residents born in this state | 13,654 |
| Residents born in another state | 4,304 |
| Census Citizenship · Foreign Born | 2,160 |
| Census Citizenship · Naturalized | 371 |
| Census Citizenship · Non Citizen | 197 |
| Foreign-born residents | 11.6% |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Households & Family Composition
7,352 households.
| Family households | 5,395 households (vs Virginia 9,367) |
|---|---|
| Total households | 7,352 households (vs Virginia 14,324) |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Residential Stability & Migration
How long residents have lived here and where they came from. The surrounding county is gaining 918 residents per year on net (IRS migration data).
| Migration · People moving in (annual) | 18,790 |
|---|---|
| Migration · People moving out (annual) | 17,872 |
| Migration · Net migration (in − out) | 918 |
| Migration · Population growing | Yes |
| Migration · Year | 2022-2023 |
Sources: IRS SOI Migration 2022-2023
Disability
Census ACS measures self-reported functional limitations — vision, hearing, mobility, cognitive, self-care, or independent-living. The U.S. baseline disability rate is about 12–13%; rates trend higher with median age.
| Census Disability · Total Pop | 18,525 |
|---|---|
| With Disability | 2,371 |
| Pct With Disability | 12.8% |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Group Quarters
Group quarters are non-household living arrangements counted by the Census — college dormitories, nursing homes, military barracks, group homes, correctional facilities, and similar institutional or shared housing. 0 residents live in group quarters.
| Census Group Quarters · Total | 80 |
|---|
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29
Other
| Census Mobility · Total | 18,374 |
|---|---|
| Census Mobility · Same House | 17,165 |
| Census Mobility · Same County | 232 |
| Census Mobility · Diff County Same State | 904 |
| Census Mobility · Diff State | 59 |
| Census Mobility · From Abroad | 14 |
| Census Mobility · Moved Total | 1,209 |
| Census Mobility · Pct Moved In Year | 6.6% |
| Pct White | 77.6% |
Sources: Census ACS 5-Year 2024 — county-level query · Refreshed 2026-04-29