ZIP Code 15478

15478 is one of Pennsylvania's ZIP codes, delivering to addresses in Smithfield, Fayette County.

City: Smithfield
County: Fayette County
State: Pennsylvania
Prefix: 154xx

Where this code sits

15478 is part of the 154xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Smithfield.

Smithfield Pennsylvania ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 15478 delivers to without sharing its boundary.

ZIP codes nearest 15478

The ZIP codes whose reference points sit closest to 15478.
ZIP code	Distance	Delivers to
ZIP code 15439	3.5 mi	Gans, PA
ZIP code 15436	3.7 mi	Fairchance, PA
ZIP code 15451	3.9 mi	Lake Lynn, PA
ZIP code 15467	5.1 mi	New Geneva, PA
ZIP code 15460	5.2 mi	Martin, PA
ZIP code 15454	5.7 mi	Leckrone, PA
ZIP code 15461	5.8 mi	Masontown, PA
ZIP code 15474	6.1 mi	Point Marion, 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 15478, plotted from its record coordinates.

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

Scope ZIP code 15478. 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.