City ZIP codes · Virginia
Fairfax, VA ZIP Codes
9 ZIP codes use the postal name Fairfax, Virginia (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 5 residential and 4 for PO boxes or a single organization. Median household income runs from $134,577 in 22031 to $178,394 in 22032, 1.3 times as much (Census Bureau, ACS 2020-2024). Fairfax's most populous ZIP code is 22030, with 61,332 people (ACS 2020-2024); 24% of its land is in the city of Fairfax.
- ACS2020-24
- Census2020
- GeoNames2026
Where are Fairfax's ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are Fairfax's ZIP codes?
The highest median household income is in 22032 ($178,394), the lowest in 22031 ($134,577). Home values run from $648,800 in 22033 to $799,200 in 22032.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).
All 5 residential ZIP codes of Fairfax
| County | |||||
|---|---|---|---|---|---|
| 22030 | Fairfax County | 61,332 | 3,154 | $140k | $740k |
| 22033 | Fairfax County | 39,526 | 5,054 | $144k | $649k |
| 22031 | Fairfax County | 37,276 | 5,230 | $135k | $724k |
| 22032 | Fairfax County | 29,240 | 4,047 | $178k | $799k |
| 22035 | Fairfax County | no residents | 0 | – | – |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).
PO Box and single-organization ZIP codes in Fairfax
4 ZIP codes named Fairfax have no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.
| ZIP | County |
|---|---|
| 22034 | Fairfax County |
| 22036 | Fairfax County |
| 22037 | Fairfax County |
| 22038 | Fairfax city |
Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.
Which counties do Fairfax's ZIP codes reach?
Fairfax city (FIPS 51600) is the independent city of Fairfax, a county-equivalent. All 3 residential ZIP codes of Fairfax city are among Fairfax's 5, listed here (the County column of the table marks them).
Fairfax's residential ZIP codes lie in 2 counties: Fairfax County (5 ZIP codes mainly there), Fairfax city (part of a ZIP code).
Which places do Fairfax's ZIP codes cover?
A postal name is not a city limit. By the Census Bureau's places, Fairfax's residential ZIP codes cover Fairfax itself and 14 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:
- Fair Oaks census-designated 22030, 22033, 22035
- Fair Lakes census-designated 22030, 22033
- Fairfax Station census-designated 22030, 22032
- George Mason census-designated 22030, 22032
- Braddock census-designated 22030
- Franklin Farm census-designated 22033
- Greenbriar census-designated 22033
- Kings Park West census-designated 22032
- Long Branch census-designated 22032
- Mantua census-designated 22031
- Merrifield census-designated 22031
- Navy census-designated 22033
- Oakton census-designated 22031
- Woodburn census-designated 22031
Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).
Which first three digits do Fairfax's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Fairfax starts with 220.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 220 | Northern, VA (SCF 220) | 9 | 30 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.