ZIP Code 21779

21779 is one of Maryland's ZIP codes, delivering to addresses in Rohrersville, Washington County.

City: Rohrersville
County: Washington County
State: Maryland
Prefix: 217xx

Where this code sits

21779 is part of the 217xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Rohrersville.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21779 delivers to without sharing its boundary.

ZIP codes nearest 21779

The ZIP codes whose reference points sit closest to 21779.
ZIP code	Distance	Delivers to
ZIP code 21756	2.1 mi	Keedysville, MD
ZIP code 21718	3.9 mi	Burkittsville, MD
ZIP code 21715	3.9 mi	Brownsville, MD
ZIP code 21782	5.0 mi	Sharpsburg, MD
ZIP code 21769	5.8 mi	Middletown, MD
ZIP code 21758	6.6 mi	Knoxville, MD
ZIP code 21713	7.8 mi	Boonsboro, MD
ZIP code 21755	8.1 mi	Jefferson, 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 21779, plotted from its record coordinates.

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

Scope ZIP code 21779. 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.