Demographics of King William County, Virginia

King William County, Virginia had 19,617 people on July 1, 2025, by the Census Bureau’s estimate: +1,701 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

King William County, in four figures

19,617
Population: July 1, 2025, Vintage 2025 estimate.; +9.5%
Change since July 2020: +1,701 people.; 40.9 ±0.8
Median age: ACS 2020–⁠2024.; $86,056 ±$7,056
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

King William County, Virginia's population grew 9.5% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of King William County, Virginia's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

King William County, Virginia's population grew 9.5% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of King William County, Virginia's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	17,916	100.0	100.0
2021	18,248	101.9	100.2
2022	18,518	103.4	100.7
2023	19,048	106.3	101.6
2024	19,279	107.6	102.5
2025	19,617	109.5	103.1

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Population of King William County, Virginia on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	17,916	+106	−2	0	+117
2021	18,248	+332	+42	+7	+284
2022	18,518	+270	+13	+10	+236
2023	19,048	+530	+56	+13	+451
2024	19,279	+231	+67	+23	+138
2025	19,617	+338	+55	+7	+279

Age, 2020–2024

The median age is 40.9 ±0.8: for men 38.3 ±2.0 and for women 41.8 ±1.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in King William County by age, ACS 2020–2024
Age	People	Share	Virginia	United States
Under 5	1,218 ±83	6.6% ±0.4	5.6% ±<0.1	5.6% ±<0.1
5 to 17	3,006 ±300	16.2% ±1.6	16.1% ±0.1	16.3% ±<0.1
18 to 24	1,284 ±194	6.9% ±1.0	9.3% ±0.1	9.1% ±<0.1
25 to 44	5,066 ±336	27.2% ±1.8	27.1% ±0.1	26.9% ±<0.1
45 to 64	4,890 ±339	26.3% ±1.8	25.3% ±0.1	24.8% ±<0.1
65 and over	3,129 ±341	16.8% ±1.8	16.7% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $86,056 ±$7,056, and income per person $39,260 ±$1,964, in 2024 dollars. The median is $93,170 ±$458 in Virginia and $80,734 ±$166 in the United States.

Households by income

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Households in King William County by income, ACS 2020–2024
Household income	Households	Share	Virginia	United States
Under $25,000	850 ±213	11.6% ±2.9	12.2% ±0.2	14.6% ±<0.1
$25,000 to $49,999	1,121 ±251	15.2% ±3.4	14.5% ±0.2	16.7% ±<0.1
$50,000 to $74,999	1,171 ±263	15.9% ±3.6	14.3% ±0.2	15.5% ±<0.1
$75,000 to $99,999	1,087 ±287	14.8% ±3.9	12.1% ±0.1	12.6% ±<0.1
$100,000 to $149,999	1,718 ±336	23.4% ±4.5	18.1% ±0.2	17.5% ±<0.1
$150,000 to $199,999	698 ±283	9.5% ±3.8	11.1% ±0.1	9.6% ±<0.1
$200,000 or more	707 ±213	9.6% ±2.9	17.7% ±0.2	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in King William County by age, ACS 2020–2024
Age	Below poverty	Rate	Virginia	United States
All ages	1,082 ±302	5.9% ±1.6	9.9% ±0.2	12.5% ±0.1
Under 18	79 to 327	1.9% to 7.8%	12.3% ±0.3	16.1% ±0.1
18 to 59	381 ±143	3.9% ±1.5	9.4% ±0.2	11.6% ±0.1
60 and over	498 ±167	10.8% ±3.5	8.9% ±0.2	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in King William County, ACS 2020–2024
Measure	King William County	Virginia	United States
Housing units	7,730 ±16	3,684,756 ±486	143,775,355 ±10,234
Occupied	95.1% ±2.0	91.3% ±0.2	89.9% ±0.1
Vacant	4.9% ±2.0	8.7% ±0.2	10.1% ±0.1
Owner occupied	88.9% ±2.7	67.3% ±0.4	65.2% ±0.3
Renter occupied	11.1% ±2.8	32.7% ±0.2	34.8% ±0.1
Median home value	$315,700 ±$14,033	$383,700 ±$1,024	$332,700 ±$236
Median gross rent	$1,166 ±$163	$1,579 ±$8	$1,413 ±$2
Median year built	1996 ±3	1984 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in King William County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Virginia	United States
Hispanic or Latino	612 ±0	3.3% ±<0.1	11.0% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	14,196 ±94	76.4% ±0.5	58.4% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	2,795 ±283	15.0% ±1.5	18.3% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 232	0% to 1.2%	6.9% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	200 ±61	1.1% ±0.3	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 30	0% to 0.2%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 144	0% to 0.8%	0.6% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	608 ±270	3.3% ±1.5	4.7% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in King William County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Virginia	United States
Born in the state	13,654 ±651	73.4% ±3.5	48.8% ±0.1	57.3% ±<0.1
Born in another state	4,304 ±615	23.1% ±3.3	35.9% ±0.2	26.9% ±<0.1
Born a citizen outside the states	69 to 325	0.4% to 1.7%	2.1% ±<0.1	1.7% ±<0.1
Born abroad	438 ±200	2.4% ±1.1	13.1% ±0.1	14.1% ±<0.1
Naturalized citizens	158 to 532	0.8% to 2.9%	7.4% ±0.1	7.4% ±<0.1
Not citizens	0 to 189	0% to 1.0%	5.7% ±0.1	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

King William County among the counties of Virginia

82nd of 133 by population, July 2025. Every one is listed on the Virginia page.

Counties of Virginia near King William County in population, July 2025
County	July 2025	Change since 2020
Prince Edward County	22,391	+2.3%
Greene County	21,958	+6.6%
Lee County	21,642	−2.1%
Scott County	21,200	−1.8%
Westmoreland County	19,715	+6.5%
King William County	19,617	+9.5%
Colonial Heights city	18,738	+3.2%
Buchanan County	18,492	−8.7%
Southampton County	18,110	+0.9%
Patrick County	17,424	−0.9%
Radford city	17,243	+7.0%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026