ZIP Code 21817

21817 is one of Maryland's ZIP codes, delivering to addresses in Crisfield, Somerset County.

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

Where this code sits

21817 is part of the 218xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Crisfield.

Crisfield Maryland ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21817 delivers to without sharing its boundary.

ZIP codes nearest 21817

The ZIP codes whose reference points sit closest to 21817.
ZIP code	Distance	Delivers to
ZIP code 21838	5.5 mi	Marion Station, MD
ZIP code 23427	7.7 mi	Saxis, VA
ZIP code 21890	7.9 mi	Westover, MD
ZIP code 21867	8.7 mi	Upper Fairmount, MD
ZIP code 21871	9.8 mi	Westover, MD
ZIP code 21866	9.9 mi	Tylerton, MD
ZIP code 23426	9.9 mi	Sanford, VA
ZIP code 21836	10 mi	Manokin, 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 21817, plotted from its record coordinates.

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

Scope ZIP code 21817. 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.