ZIP Code 21222

21222 is one of Maryland's ZIP codes, delivering to addresses in Dundalk, Baltimore County.

City: Dundalk
County: Baltimore County
State: Maryland
Prefix: 212xx

Where this code sits

21222 is part of the 212xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Dundalk.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21222 delivers to without sharing its boundary.

ZIP codes nearest 21222

The ZIP codes whose reference points sit closest to 21222.
ZIP code	Distance	Delivers to
ZIP code 21219	3.6 mi	Sparrows Point, MD
ZIP code 21221	3.7 mi	Essex, MD
ZIP code 21224	3.7 mi	Baltimore, MD
ZIP code 21052	4.8 mi	Fort Howard, MD
ZIP code 21237	4.9 mi	Rosedale, MD
ZIP code 21226	5.2 mi	Curtis Bay, MD
ZIP code 21205	5.2 mi	Baltimore, MD
ZIP code 21231	5.4 mi	Baltimore, 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 21222, plotted from its record coordinates.

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

Scope ZIP code 21222. 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.