ZIP Code 21921

21921 is one of Maryland's ZIP codes, delivering to addresses in Elkton, Cecil County.

City: Elkton
County: Cecil County
State: Maryland
Prefix: 219xx

Where this code sits

21921 is part of the 219xx range, the group of codes handled by one mail processing centre. Elkton is served by 2 ZIP codes in total; the full list, with the county each falls in, is on the Elkton page.

Elkton Maryland ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21921 delivers to without sharing its boundary.

ZIP codes nearest 21921

The ZIP codes whose reference points sit closest to 21921.
ZIP code	Distance	Delivers to
ZIP code 21922	1.5 mi	Elkton, MD
ZIP code 21916	1.9 mi	Childs, MD
ZIP code 21920	2.4 mi	Elk Mills, MD
ZIP code 21901	5.9 mi	North East, MD
ZIP code 19716	6.4 mi	Newark, DE
ZIP code 19717	6.5 mi	Newark, DE
ZIP code 19351	6.8 mi	Lewisville, PA
ZIP code 19713	7.6 mi	Newark, DE

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 21921, plotted from its record coordinates.

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

Scope ZIP code 21921. 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.