ZIP Code 20689

20689 is one of Maryland's ZIP codes, delivering to addresses in Sunderland, Calvert County.

City: Sunderland
County: Calvert County
State: Maryland
Prefix: 206xx

Where this code sits

20689 is part of the 206xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Sunderland.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20689 delivers to without sharing its boundary.

ZIP codes nearest 20689

The ZIP codes whose reference points sit closest to 20689.
ZIP code	Distance	Delivers to
ZIP code 20732	2.6 mi	Chesapeake Beach, MD
ZIP code 20639	3.0 mi	Huntingtown, MD
ZIP code 20736	3.6 mi	Owings, MD
ZIP code 20714	4.9 mi	North Beach, MD
ZIP code 20758	6.0 mi	Friendship, MD
ZIP code 20754	7.3 mi	Dunkirk, MD
ZIP code 20678	8.0 mi	Prince Frederick, MD
ZIP code 20779	8.2 mi	Tracys Landing, 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 20689, plotted from its record coordinates.

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

Scope ZIP code 20689. 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.