ZIP Code 20621

20621 is one of Maryland's ZIP codes, delivering to addresses in Chaptico, St. Mary's County.

City: Chaptico
County: St. Mary's County
State: Maryland
Prefix: 206xx

Where this code sits

20621 is part of the 206xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Chaptico.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20621 delivers to without sharing its boundary.

ZIP codes nearest 20621

The ZIP codes whose reference points sit closest to 20621.
ZIP code	Distance	Delivers to
ZIP code 20624	3.2 mi	Clements, MD
ZIP code 20618	4.6 mi	Bushwood, MD
ZIP code 20660	5.0 mi	Morganza, MD
ZIP code 20609	5.1 mi	Avenue, MD
ZIP code 20656	5.4 mi	Loveville, MD
ZIP code 20661	5.5 mi	Mount Victoria, MD
ZIP code 20682	5.8 mi	Rock Point, MD
ZIP code 20659	6.3 mi	Mechanicsville, 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 20621, plotted from its record coordinates.

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

Scope ZIP code 20621. 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.