ZIP Code 15557

15557 is one of Pennsylvania's ZIP codes, delivering to addresses in Rockwood, Somerset County.

City: Rockwood
County: Somerset County
State: Pennsylvania
Prefix: 155xx

Where this code sits

15557 is part of the 155xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Rockwood.

Rockwood Pennsylvania ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 15557 delivers to without sharing its boundary.

ZIP codes nearest 15557

The ZIP codes whose reference points sit closest to 15557.
ZIP code	Distance	Delivers to
ZIP code 15551	7.1 mi	Markleton, PA
ZIP code 15510	7.9 mi	Somerset, PA
ZIP code 15501	8.2 mi	Somerset, PA
ZIP code 15542	8.3 mi	Garrett, PA
ZIP code 15502	8.4 mi	Hidden Valley, PA
ZIP code 15540	10 mi	Fort Hill, PA
ZIP code 15622	10 mi	Champion, PA
ZIP code 15549	11 mi	Listie, 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 15557, plotted from its record coordinates.

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

Scope ZIP code 15557. 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.