ZIP codes in King William County
6 ZIPs touch King William County, Virginia. The blue dashed line is the county border; orange ZIPs reach into it.
6
ZIP codes
3
cross the county line
22,562
people in these ZIPs
133
counties in VA
Most people
King William County ZIP list
More counties in Virginia
- Henry County14
- Highland County8
- Hopewell city1
- Isle of Wight County11
- James City County9
- King George County6
- King and Queen County16
- Lancaster County10
- Lee County11
- Lexington city1
- Loudoun County40
- Louisa County13
Questions people actually ask
How many ZIP codes are in King William County, Virginia?
6 ZIP codes reach into King William County. 3 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in King William County has the most people?
23009 (Aylett) has about 8,270 residents, the most of any ZIP touching King William County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in King William County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in King William County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from