ZIP Code 20646

20646 is one of Maryland's ZIP codes, delivering to addresses in La Plata, Charles County.

City: La Plata
County: Charles County
State: Maryland
Prefix: 206xx

Where this code sits

20646 is part of the 206xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to La Plata.

La Plata Maryland ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20646 delivers to without sharing its boundary.

ZIP codes nearest 20646

The ZIP codes whose reference points sit closest to 20646.
ZIP code	Distance	Delivers to
ZIP code 20604	1.1 mi	Waldorf, MD
ZIP code 20677	3.5 mi	Port Tobacco, MD
ZIP code 20611	3.7 mi	Bel Alton, MD
ZIP code 20675	4.3 mi	Pomfret, MD
ZIP code 20695	5.0 mi	White Plains, MD
ZIP code 20632	6.1 mi	Faulkner, MD
ZIP code 20602	6.4 mi	Waldorf, MD
ZIP code 20693	7.1 mi	Welcome, 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 20646, plotted from its record coordinates.

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

Scope ZIP code 20646. 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.