ZIP Codes of King William County, VA

Population & People
Population & People
Total Population
18,529
Household Income
Household Income
Median Income
$85,723
Housing
Housing
Total Housing Units
7,601
Business & Economy
Business & Economy
Total Businesses
382
Employment
Employment
Employment Rate
67.92%
Education
Education
Bachelor's Degree+
23.53%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:686 / 804
Timezone:Eastern (GMT -05:00)
Local Time:2:14:10 PM
Population:18,529 [See All]
FIPS:51101
CBSA:Richmond, VA
Land Area:265 sq mi
Water Area:12 sq mi
Coordinates:37.7022, -77.0900
Quick Link:
https://www.zip-codes.com/county/va-king-william.asp
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Owner-dominated county
Just 11.2% of homes are rentals — strong homeownership culture.

Standout ZIPs in this County


Most Populous
Aylett · 8,270 people
44.6% of county total
Highest Income
Aylett · $98,581 median
1.1× county average
Largest Land Area
King William · 83.9 sq mi
Spans the most ground
Fastest Growth
King William · 31.9% (10-yr)
2,863 → 3,777 residents
Most Educated
West Point · 26.6% bachelor's+
1,073 of 4,032 adults 25+

Things worth knowing about King William County


18,529 residents live across 4 ZIPs covering 265 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 15,956 to 18,529 from 2014 to 2024 — a +16.1% change. 3 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 23009 (Aylett, $98,581 median) and poorest ZIP 23106 (Manquin, $59,028) are 6.0 miles apart — a 1.7× income gap across local geography.

Median home values vary 1.1× across this county — from $290,600 in 23181 (West Point) to $323,400 in 23086 (King William).

Density varies across the county — from 35 people/sq mi in 23106 (Manquin) to 101 in 23009 (Aylett).

Educational attainment ranges from 20.5% bachelor's+ in 23086 (King William) to 26.6% in 23181 (West Point) — the breadth of educational profiles across the area.

Within Virginia, this is the #82 most populous of 134 counties and ranks #43 for median household income with the #14 fastest decade growth .

Weighted by population, the typical household earns about $93,924 across the county — reflecting what a typical resident sees, not a simple ZIP average.

23.5% of adults age 25+ hold a bachelor's degree or higher (3,056 of 12,986 reporting).

4 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about King William County


Where the growth lives

King William County grew 16.1% over the past decade — concentrated in 2 high-growth ZIPs:

King William
+31.9%
2,863 → 3,777 residents
Aylett
+30.6%
6,333 → 8,270 residents

All ZIP Codes in King William County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
23009AylettStandard8,270$98,58181.530.6%
23181West PointStandard5,565$95,69973.82.0%
23086King WilliamStandard3,777$89,58383.931.9%
23106ManquinStandard917$59,02825.8-29.6%

Adjacent & Nearby Counties