In which county is ZIP code 22121 located?

ZIP 22121 is listed under Fairfax County, VA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 22121: Mount Vernon, VA

ZIP: 22121

County: Fairfax County

Coordinates: 38.71920, -77.10730

ZIP Type: Standard

Time Zone: Eastern Time (ET)

This profile provides an in-depth look at ZIP code 22121, serving Mount Vernon in VA. It lies in Fairfax County and supports delivery, planning, and address verification.

Primary City	Mount Vernon
ZIP Code	22121
County	Fairfax County
State	VA
Latitude / Longitude	38.71920, -77.10730
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 22121 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 22121 are listed as 38.71920 / -77.10730, useful for GPS and service checks in and around Mount Vernon, VA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 22121 for mail delivery and general location reference in Fairfax County, VA.

This ZIP may extend beyond the city core into nearby communities within Fairfax County.

Related ZIP Codes (Nearby)

Explore other postal codes near Mount Vernon within VA.

Frequently Asked Questions

What is the primary city for ZIP code 22121?

The primary city for this ZIP code is Mount Vernon, located in VA.

In which county is 22121 located?

ZIP code 22121 is situated within Fairfax County, VA.

What are the coordinates for 22121?

The approximate center point is 38.71920 (Latitude) and -77.10730 (Longitude).

Is ZIP code 22121 active?

This page lists ZIP 22121 as Listed based on the latest refresh date shown above.

Does ZIP 22121 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08