ZIP Code 18921

18921 is one of Pennsylvania's ZIP codes, delivering to addresses in Ferndale, Bucks County.

City: Ferndale
County: Bucks County
State: Pennsylvania
Prefix: 189xx

Where this code sits

18921 is part of the 189xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ferndale.

Ferndale Pennsylvania ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 18921 delivers to without sharing its boundary.

ZIP codes nearest 18921

The ZIP codes whose reference points sit closest to 18921.
ZIP code	Distance	Delivers to
ZIP code 18953	1.6 mi	Revere, PA
ZIP code 18930	1.7 mi	Kintnersville, PA
ZIP code 18972	2.8 mi	Upper Black Eddy, PA
ZIP code 18039	3.7 mi	Durham, PA
ZIP code 18077	3.7 mi	Riegelsville, PA
ZIP code 18942	5.3 mi	Ottsville, PA
ZIP code 18920	5.4 mi	Erwinna, PA
ZIP code 08848	5.7 mi	Milford, NJ

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 18921, plotted from its record coordinates.

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

Scope ZIP code 18921. 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.