ZIP Code 21123

21123 is one of Maryland's ZIP codes, delivering to addresses in Pasadena, Anne Arundel County.

City: Pasadena
County: Anne Arundel County
State: Maryland
Prefix: 211xx

Where this code sits

21123 is part of the 211xx range, the group of codes handled by one mail processing centre. Pasadena is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Pasadena page.

Pasadena Maryland ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21123 delivers to without sharing its boundary.

ZIP codes nearest 21123

The ZIP codes whose reference points sit closest to 21123.
ZIP code	Distance	Delivers to
ZIP code 21062	0.0 mi	Glen Burnie, MD
ZIP code 21411	0.0 mi	Annapolis, MD
ZIP code 21412	0.0 mi	Annapolis, MD
ZIP code 21140	1.7 mi	Riva, MD
ZIP code 21401	2.6 mi	Annapolis, MD
ZIP code 21035	3.4 mi	Davidsonville, MD
ZIP code 21405	4.5 mi	Annapolis, MD
ZIP code 21037	5.0 mi	Edgewater, 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 21123, plotted from its record coordinates.

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

Scope ZIP code 21123. 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.