ZIP Code 21720

21720 is one of Maryland's ZIP codes, delivering to addresses in Cavetown, Washington County.

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

Where this code sits

21720 is part of the 217xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Cavetown.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21720 delivers to without sharing its boundary.

ZIP codes nearest 21720

The ZIP codes whose reference points sit closest to 21720.
ZIP code	Distance	Delivers to
ZIP code 21783	0.7 mi	Smithsburg, MD
ZIP code 21721	2.8 mi	Chewsville, MD
ZIP code 21742	5.8 mi	Hagerstown, MD
ZIP code 21719	5.8 mi	Cascade, MD
ZIP code 21780	6.6 mi	Sabillasville, MD
ZIP code 17250	6.9 mi	Rouzerville, PA
ZIP code 21734	6.9 mi	Funkstown, MD
ZIP code 21741	7.2 mi	Hagerstown, 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 21720, plotted from its record coordinates.

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

Scope ZIP code 21720. 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.