| ZIP Codes: | 2 ZIP Codes (1 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 571 / 703 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:14:09 PM |
| Population: | 61,332 [See All] |
| FIPS: | 51600 |
| CBSA: | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| Land Area: | 19 sq mi |
| Water Area: | 16 sq mi |
| Coordinates: | 38.8410, -77.3305 |
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61,332 residents live across 2 ZIPs covering 19 sq mi, served by 1 distinct USPS-recognized cities.
Population moved from 56,961 to 61,332 from 2014 to 2024 — a +7.7% change. 1 ZIPs gained residents, 0 lost.
The county's wealthiest ZIP 22030 (Fairfax, $139,831 median) and poorest ZIP 22030 (Fairfax, $139,831) are 0.0 miles apart — a 1.0× income gap across local geography.
Within Virginia, this is the #32 most populous of 134 counties and ranks #6 for median household income with the #35 fastest decade growth .
On the national stage, Fairfax City County is ranks #35 for income .
Weighted by population, the typical household earns about $139,831 across the county — reflecting what a typical resident sees, not a simple ZIP average.
66.5% of adults age 25+ hold a bachelor's degree or higher (25,403 of 38,204 reporting).
1 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.