ZIP Code 20855

20855 is one of Maryland's ZIP codes, delivering to addresses in Derwood, Montgomery County.

City: Derwood
County: Montgomery County
State: Maryland
Prefix: 208xx

Where this code sits

20855 is part of the 208xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Derwood.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20855 delivers to without sharing its boundary.

ZIP codes nearest 20855

The ZIP codes whose reference points sit closest to 20855.
ZIP code	Distance	Delivers to
ZIP code 20880	1.4 mi	Washington Grove, MD
ZIP code 20877	2.3 mi	Gaithersburg, MD
ZIP code 20883	3.2 mi	Gaithersburg, MD
ZIP code 20813	3.3 mi	Bethesda, MD
ZIP code 20827	3.3 mi	Bethesda, MD
ZIP code 20848	3.3 mi	Rockville, MD
ZIP code 20859	3.3 mi	Potomac, MD
ZIP code 20875	3.3 mi	Germantown, MD

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 20855, plotted from its record coordinates.

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

Scope ZIP code 20855. 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.