ZIP Code 20686

20686 is one of Maryland's ZIP codes, delivering to addresses in Saint Marys City, St. Mary's County.

City: Saint Marys City
County: St. Mary's County
State: Maryland
Prefix: 206xx

Where this code sits

20686 is part of the 206xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Saint Marys City.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20686 delivers to without sharing its boundary.

ZIP codes nearest 20686

The ZIP codes whose reference points sit closest to 20686.
ZIP code	Distance	Delivers to
ZIP code 20667	2.2 mi	Park Hall, MD
ZIP code 20630	2.3 mi	Drayden, MD
ZIP code 20684	3.3 mi	Saint Inigoes, MD
ZIP code 20692	4.0 mi	Valley Lee, MD
ZIP code 20653	4.4 mi	Lexington Park, MD
ZIP code 20628	4.8 mi	Dameron, MD
ZIP code 20674	5.0 mi	Piney Point, MD
ZIP code 20620	5.5 mi	Callaway, 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 20686, plotted from its record coordinates.

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

Scope ZIP code 20686. 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.