ZIP Code 15378

15378 is one of Pennsylvania's ZIP codes, delivering to addresses in Westland, Washington County.

City: Westland
County: Washington County
State: Pennsylvania
Prefix: 153xx

Where this code sits

15378 is part of the 153xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Westland.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 15378 delivers to without sharing its boundary.

ZIP codes nearest 15378

The ZIP codes whose reference points sit closest to 15378.
ZIP code	Distance	Delivers to
ZIP code 15340	1.9 mi	Hickory, PA
ZIP code 15361	3.6 mi	Southview, PA
ZIP code 15342	3.7 mi	Houston, PA
ZIP code 15350	4.0 mi	Muse, PA
ZIP code 15363	4.4 mi	Strabane, PA
ZIP code 15347	4.8 mi	Meadow Lands, PA
ZIP code 15321	5.5 mi	Cecil, PA
ZIP code 15317	5.6 mi	Canonsburg, 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 15378, plotted from its record coordinates.

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

Scope ZIP code 15378. 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.