ZIP Code 15421

15421 is one of Pennsylvania's ZIP codes, delivering to addresses in Chalk Hill, Fayette County.

City: Chalk Hill
County: Fayette County
State: Pennsylvania
Prefix: 154xx

Where this code sits

15421 is part of the 154xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Chalk Hill.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 15421 delivers to without sharing its boundary.

ZIP codes nearest 15421

The ZIP codes whose reference points sit closest to 15421.
ZIP code	Distance	Delivers to
ZIP code 15437	2.8 mi	Farmington, PA
ZIP code 15445	3.6 mi	Hopwood, PA
ZIP code 15470	4.1 mi	Ohiopyle, PA
ZIP code 15416	6.0 mi	Brownfield, PA
ZIP code 15456	6.5 mi	Lemont Furnace, PA
ZIP code 15465	6.6 mi	Mount Braddock, PA
ZIP code 15401	7.5 mi	Uniontown, PA
ZIP code 15440	7.6 mi	Gibbon Glade, PA

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 15421, plotted from its record coordinates.

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

Scope ZIP code 15421. 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.