ZIP Code 20604

20604 is one of Maryland's ZIP codes, delivering to addresses in Waldorf, Charles County.

City: Waldorf
County: Charles County
State: Maryland
Prefix: 206xx

Where this code sits

20604 is part of the 206xx range, the group of codes handled by one mail processing centre. Waldorf is served by 4 ZIP codes in total; the full list, with the county each falls in, is on the Waldorf page.

Waldorf Maryland ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20604 delivers to without sharing its boundary.

ZIP codes nearest 20604

The ZIP codes whose reference points sit closest to 20604.
ZIP code	Distance	Delivers to
ZIP code 20646	1.1 mi	La Plata, MD
ZIP code 20611	2.5 mi	Bel Alton, MD
ZIP code 20677	3.3 mi	Port Tobacco, MD
ZIP code 20632	4.9 mi	Faulkner, MD
ZIP code 20675	5.5 mi	Pomfret, MD
ZIP code 20695	6.1 mi	White Plains, MD
ZIP code 20693	6.8 mi	Welcome, MD
ZIP code 20602	7.0 mi	Waldorf, 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 20604, plotted from its record coordinates.

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

Scope ZIP code 20604. 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.