ZIP Code 21857

21857 is one of Maryland's ZIP codes, delivering to addresses in Rehobeth, Somerset County.

City: Rehobeth
County: Somerset County
State: Maryland
Prefix: 218xx

Where this code sits

21857 is part of the 218xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Rehobeth.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21857 delivers to without sharing its boundary.

ZIP codes nearest 21857

The ZIP codes whose reference points sit closest to 21857.
ZIP code	Distance	Delivers to
ZIP code 21838	5.2 mi	Marion Station, MD
ZIP code 21871	6.0 mi	Westover, MD
ZIP code 21851	6.3 mi	Pocomoke City, MD
ZIP code 23488	7.1 mi	Withams, VA
ZIP code 21836	7.3 mi	Manokin, MD
ZIP code 23426	8.1 mi	Sanford, VA
ZIP code 21867	8.3 mi	Upper Fairmount, MD
ZIP code 23427	8.4 mi	Saxis, VA

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 21857, plotted from its record coordinates.

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

Scope ZIP code 21857. 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.