In which county is ZIP code 20121 located?

ZIP 20121 is listed under Fairfax County, VA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 20121: Centreville, VA

ZIP: 20121

County: Fairfax County

Coordinates: 38.81950, -77.45580

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Get a reliable snapshot of the Centreville, VA postal area 20121. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Centreville
ZIP Code	20121
County	Fairfax County
State	VA
Latitude / Longitude	38.81950, -77.45580
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 20121 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 20121 are listed as 38.81950 / -77.45580, useful for GPS and service checks in and around Centreville, VA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 20121 for mail delivery and general location reference in Fairfax County, VA.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Centreville.

Related ZIP Codes (Nearby)

Explore other postal codes near Centreville within VA.

Frequently Asked Questions

What is the primary city for ZIP code 20121?

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

In which county is 20121 located?

ZIP code 20121 is situated within Fairfax County, VA.

What are the coordinates for 20121?

The approximate center point is 38.81950 (Latitude) and -77.45580 (Longitude).

Is ZIP code 20121 active?

This page lists ZIP 20121 as Listed based on the latest refresh date shown above.

Does ZIP 20121 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