ZIP Code 22121

22121 is one of Virginia's ZIP codes, delivering to addresses in Mount Vernon, Fairfax County.

City: Mount Vernon
County: Fairfax County
State: Virginia
Prefix: 221xx

Where this code sits

22121 is part of the 221xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mount Vernon.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 22121 delivers to without sharing its boundary.

ZIP codes nearest 22121

The ZIP codes whose reference points sit closest to 22121.
ZIP code	Distance	Delivers to
ZIP code 22309	0.0 mi	Alexandria, VA
ZIP code 22036	1.8 mi	Fairfax, VA
ZIP code 22060	2.6 mi	Fort Belvoir, VA
ZIP code 22308	2.7 mi	Alexandria, VA
ZIP code 22306	2.9 mi	Alexandria, VA
ZIP code 22315	3.6 mi	Alexandria, VA
ZIP code 22310	4.2 mi	Alexandria, VA
ZIP code 22307	4.2 mi	Alexandria, VA

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 22121, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 22121. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.