ZIP Code 21651

21651 is one of Maryland's ZIP codes, delivering to addresses in Millington, Kent County.

City: Millington
County: Kent County
State: Maryland
Prefix: 216xx

Where this code sits

21651 is part of the 216xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Millington.

Millington Maryland ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 21651 delivers to without sharing its boundary.

ZIP codes nearest 21651

The ZIP codes whose reference points sit closest to 21651.
ZIP code	Distance	Delivers to
ZIP code 21628	3.1 mi	Crumpton, MD
ZIP code 21635	4.5 mi	Galena, MD
ZIP code 21650	4.7 mi	Massey, MD
ZIP code 21645	4.9 mi	Kennedyville, MD
ZIP code 21930	6.4 mi	Georgetown, MD
ZIP code 21668	6.8 mi	Sudlersville, MD
ZIP code 21667	8.9 mi	Still Pond, MD
ZIP code 21913	8.9 mi	Cecilton, 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 21651, plotted from its record coordinates.

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

Scope ZIP code 21651. 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.