ZIP Code 21837

21837 is one of Maryland's ZIP codes, delivering to addresses in Mardela Springs, Wicomico County.

City: Mardela Springs
County: Wicomico County
State: Maryland
Prefix: 218xx

Where this code sits

21837 is part of the 218xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mardela Springs.

Mardela Springs Maryland ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21837 delivers to without sharing its boundary.

ZIP codes nearest 21837

The ZIP codes whose reference points sit closest to 21837.
ZIP code	Distance	Delivers to
ZIP code 21861	3.8 mi	Sharptown, MD
ZIP code 21830	6.3 mi	Hebron, MD
ZIP code 21869	7.1 mi	Vienna, MD
ZIP code 21659	8.3 mi	Rhodesdale, MD
ZIP code 19931	8.5 mi	Bethel, DE
ZIP code 19940	9.0 mi	Delmar, DE
ZIP code 21802	9.2 mi	Salisbury, MD
ZIP code 21803	9.2 mi	Salisbury, 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 21837, plotted from its record coordinates.

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

Scope ZIP code 21837. 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.