In which county is ZIP code 20171 located?

ZIP 20171 is listed under Fairfax County, VA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 20171: Herndon, VA

ZIP: 20171

County: Fairfax County

Coordinates: 38.92520, -77.39280

ZIP Type: Standard

Time Zone: Eastern Time (ET)

This profile provides an in-depth look at ZIP code 20171, serving Herndon in VA. It lies in Fairfax County and supports delivery, planning, and address verification.

Primary City	Herndon
ZIP Code	20171
County	Fairfax County
State	VA
Latitude / Longitude	38.92520, -77.39280
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 20171 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 20171 are listed as 38.92520 / -77.39280, useful for GPS and service checks in and around Herndon, VA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 20171 for mail delivery and general location reference in Fairfax County, VA.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Herndon within VA.

Frequently Asked Questions

What is the primary city for ZIP code 20171?

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

In which county is 20171 located?

ZIP code 20171 is situated within Fairfax County, VA.

What are the coordinates for 20171?

The approximate center point is 38.92520 (Latitude) and -77.39280 (Longitude).

Is ZIP code 20171 active?

This page lists ZIP 20171 as Listed based on the latest refresh date shown above.

Does ZIP 20171 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