ZIP Code 20866

20866 is one of Maryland's ZIP codes, delivering to addresses in Burtonsville, Montgomery County.

City: Burtonsville
County: Montgomery County
State: Maryland
Prefix: 208xx

Where this code sits

20866 is part of the 208xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Burtonsville.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20866 delivers to without sharing its boundary.

ZIP codes nearest 20866

The ZIP codes whose reference points sit closest to 20866.
ZIP code	Distance	Delivers to
ZIP code 20868	2.9 mi	Spencerville, MD
ZIP code 20705	3.3 mi	Beltsville, MD
ZIP code 20707	3.5 mi	Laurel, MD
ZIP code 20904	3.8 mi	Silver Spring, MD
ZIP code 20759	4.0 mi	Fulton, MD
ZIP code 20905	4.2 mi	Silver Spring, MD
ZIP code 20704	4.2 mi	Beltsville, MD
ZIP code 20709	4.6 mi	Laurel, 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 20866, plotted from its record coordinates.

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

Scope ZIP code 20866. 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.