ZIP Code 20171

20171 is one of Virginia's ZIP codes, delivering to addresses in Herndon, Fairfax County.

City: Herndon
County: Fairfax County
State: Virginia
Prefix: 201xx

Where this code sits

20171 is part of the 201xx range, the group of codes handled by one mail processing centre. Herndon is served by 5 ZIP codes in total; the full list, with the county each falls in, is on the Herndon page.

Herndon Virginia ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20171 delivers to without sharing its boundary.

ZIP codes nearest 20171

The ZIP codes whose reference points sit closest to 20171.
ZIP code	Distance	Delivers to
ZIP code 20191	2.2 mi	Reston, VA
ZIP code 20172	3.1 mi	Herndon, VA
ZIP code 22095	3.1 mi	Herndon, VA
ZIP code 22033	3.3 mi	Fairfax, VA
ZIP code 20190	3.7 mi	Reston, VA
ZIP code 20151	3.9 mi	Chantilly, VA
ZIP code 20170	4.3 mi	Herndon, VA
ZIP code 22124	4.6 mi	Oakton, 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 20171, plotted from its record coordinates.

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

Scope ZIP code 20171. 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.