ZIP Code 21090

21090 is one of Maryland's ZIP codes, delivering to addresses in Linthicum Heights, Anne Arundel County.

City: Linthicum Heights
County: Anne Arundel County
State: Maryland
Prefix: 210xx

Where this code sits

21090 is part of the 210xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Linthicum Heights.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21090 delivers to without sharing its boundary.

ZIP codes nearest 21090

The ZIP codes whose reference points sit closest to 21090.
ZIP code	Distance	Delivers to
ZIP code 21227	2.2 mi	Halethorpe, MD
ZIP code 21240	2.4 mi	Baltimore, MD
ZIP code 21225	3.1 mi	Brooklyn, MD
ZIP code 21061	3.9 mi	Glen Burnie, MD
ZIP code 21077	4.0 mi	Harmans, MD
ZIP code 21250	4.2 mi	Baltimore, MD
ZIP code 21230	4.5 mi	Baltimore, MD
ZIP code 21075	4.6 mi	Elkridge, 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 21090, plotted from its record coordinates.

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

Scope ZIP code 21090. 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.