ZIP Code 21668

21668 is one of Maryland's ZIP codes, delivering to addresses in Sudlersville, Queen Anne's County.

City: Sudlersville
County: Queen Anne's County
State: Maryland
Prefix: 216xx

Where this code sits

21668 is part of the 216xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Sudlersville.

Sudlersville Maryland ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21668 delivers to without sharing its boundary.

ZIP codes nearest 21668

The ZIP codes whose reference points sit closest to 21668.
ZIP code	Distance	Delivers to
ZIP code 21607	3.7 mi	Barclay, MD
ZIP code 21644	4.7 mi	Ingleside, MD
ZIP code 21628	5.1 mi	Crumpton, MD
ZIP code 21670	5.5 mi	Templeville, MD
ZIP code 21651	6.8 mi	Millington, MD
ZIP code 21649	7.0 mi	Marydel, MD
ZIP code 21623	7.8 mi	Church Hill, MD
ZIP code 21640	8.5 mi	Henderson, 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 21668, plotted from its record coordinates.

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

Scope ZIP code 21668. 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.