ZIP Code 15551

15551 is one of Pennsylvania's ZIP codes, delivering to addresses in Markleton, Somerset County.

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

Where this code sits

15551 is part of the 155xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Markleton.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 15551 delivers to without sharing its boundary.

ZIP codes nearest 15551

The ZIP codes whose reference points sit closest to 15551.
ZIP code	Distance	Delivers to
ZIP code 15485	4.2 mi	Ursina, PA
ZIP code 15424	5.3 mi	Confluence, PA
ZIP code 15540	5.5 mi	Fort Hill, PA
ZIP code 15557	7.1 mi	Rockwood, PA
ZIP code 15411	8.9 mi	Addison, PA
ZIP code 15464	12 mi	Mill Run, PA
ZIP code 15459	12 mi	Markleysburg, PA
ZIP code 15542	12 mi	Garrett, 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 15551, plotted from its record coordinates.

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

Scope ZIP code 15551. 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.