ZIP Code 20861

20861 is one of Maryland's ZIP codes, delivering to addresses in Ashton, Montgomery County.

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

Where this code sits

20861 is part of the 208xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ashton.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 20861 delivers to without sharing its boundary.

ZIP codes nearest 20861

The ZIP codes whose reference points sit closest to 20861.
ZIP code	Distance	Delivers to
ZIP code 20860	2.0 mi	Sandy Spring, MD
ZIP code 20868	2.3 mi	Spencerville, MD
ZIP code 20862	2.6 mi	Brinklow, MD
ZIP code 20905	2.6 mi	Silver Spring, MD
ZIP code 20777	2.6 mi	Highland, MD
ZIP code 20759	3.3 mi	Fulton, MD
ZIP code 20830	4.0 mi	Olney, MD
ZIP code 20833	4.4 mi	Brookeville, 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 20861, plotted from its record coordinates.

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

Scope ZIP code 20861. 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.