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ZIP codes in Fairfax city

3 ZIPs touch Fairfax city, Virginia. The blue dashed line is the county border; orange ZIPs reach into it.

3

ZIP codes

3

cross the county line

127,848

people in these ZIPs

133

counties in VA

Most people

← All Virginia ZIP codes

Fairfax city ZIP list

More counties in Virginia

All 133 counties in Virginia

Questions people actually ask

How many ZIP codes are in Fairfax city, Virginia?

3 ZIP codes reach into Fairfax city. 3 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Fairfax city has the most people?

22030 (Fairfax) has about 61,332 residents, the most of any ZIP touching Fairfax city, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Fairfax city 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 Fairfax city. 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