In which county is ZIP code 20191 located?

ZIP 20191 is listed under Fairfax County, VA.

When was this page updated?

This page was updated on 2026-01-30.

ZIP Code 20191: Reston, VA

ZIP: 20191

County: Fairfax County

Coordinates: 38.93180, -77.35270

ZIP Type: Standard

Time Zone: Eastern Time (ET)

This profile provides an in-depth look at ZIP code 20191, serving Reston in VA. It lies in Fairfax County and supports delivery, planning, and address verification.

Primary City	Reston
ZIP Code	20191
County	Fairfax County
State	VA
Latitude / Longitude	38.93180, -77.35270
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-30

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 20191 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 20191 are listed as 38.93180 / -77.35270, useful for GPS and service checks in and around Reston, VA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 20191 for mail delivery and general location reference in Fairfax County, VA.

Some addresses near Reston may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Reston within VA.

Frequently Asked Questions

What is the primary city for ZIP code 20191?

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

In which county is 20191 located?

ZIP code 20191 is situated within Fairfax County, VA.

What are the coordinates for 20191?

The approximate center point is 38.93180 (Latitude) and -77.35270 (Longitude).

Is ZIP code 20191 active?

This page lists ZIP 20191 as Listed based on the latest refresh date shown above.

Does ZIP 20191 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: 2026-01-30