ZIP Code 21005

21005 is one of Maryland's ZIP codes, delivering to addresses in Aberdeen Proving Ground, Harford County.

City: Aberdeen Proving Ground
County: Harford County
State: Maryland
Prefix: 210xx

Where this code sits

21005 is part of the 210xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Aberdeen Proving Ground.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21005 delivers to without sharing its boundary.

ZIP codes nearest 21005

The ZIP codes whose reference points sit closest to 21005.
ZIP code	Distance	Delivers to
ZIP code 21001	3.9 mi	Aberdeen, MD
ZIP code 21130	4.9 mi	Perryman, MD
ZIP code 21078	5.2 mi	Havre De Grace, MD
ZIP code 21902	5.8 mi	Perry Point, MD
ZIP code 21017	6.5 mi	Belcamp, MD
ZIP code 21903	6.9 mi	Perryville, MD
ZIP code 21610	8.3 mi	Betterton, MD
ZIP code 21028	9.1 mi	Churchville, 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 21005, plotted from its record coordinates.

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

Scope ZIP code 21005. 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.