King William County, Virginia
County seat: King William · Population 19,617 (2025) · 274 sq mi
King William County is the 82nd most populous of Virginia's 133 counties, with 19,617 people (2025 estimate). Its county seat is King William. It is part of the Middle Peninsula Planning District Commission (PD 18) region, one of the 21 Planning District Commissions of Virginia. The map shows its 1 city or town and the 4 neighboring counties.
King William County facts
- County seat
- King William
- Population (2025 estimate)
- 19,617 +10.2% since 2020
- Land area
- 274 sq mi 73rd largest of 133
- Water area
- 12 sq mi
- Population density
- 72 per sq mi
- Established
- 1702
- Named after
- William III of England King of England, Scotland, and Ireland from 1689 to 1702 (1650-1702)
- Largest city
- West Point 3,595
- Median household income
- $86,056
- Cities and towns
- 1 plus 2 CDPs
- ZIP codes
- 6
- Time zone
- Eastern
- FIPS code
- 51101
Cities and towns in King William County
King William County has 1 incorporated place. Populations count the people living inside King William County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| West Point | Town | 3,595 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Central Garage | 1,864 | |
| King William | 85 |
ZIP codes in King William County
6 ZIP codes reach into King William County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 23009
- 23069 also Hanover and Caroline counties
- 23086
- 23106
- 23177 also King and Queen County
- 23181 also New Kent County
Population of King William County, 2020–2025
King William County grew by 1,807 people (+10.2%) between April 2020 and July 2025: 231 more births than deaths and a net gain of 1,565 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 17,916 |
| 2021 | 18,248 |
| 2022 | 18,518 |
| 2023 | 19,048 |
| 2024 | 19,279 |
| 2025 | 19,617 |
Neighboring counties
- King and Queen County east · 6,743 people
- New Kent County south · 28,022 people
- Hanover County west · 116,423 people
- Caroline County northwest · 34,413 people
Printable King William County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (139 KB)
- PNG (2400 px) (115 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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