ZIP Code 18001

18001 is one of Pennsylvania's ZIP codes, delivering to addresses in Lehigh Valley, Northampton County.

City: Lehigh Valley
County: Northampton County
State: Pennsylvania
Prefix: 180xx

Where this code sits

18001 is part of the 180xx range, the group of codes handled by one mail processing centre. Lehigh Valley is served by 3 ZIP codes in total.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 18001 delivers to without sharing its boundary.

ZIP codes nearest 18001

The ZIP codes whose reference points sit closest to 18001.
ZIP code	Distance	Delivers to
ZIP code 18003	0.0 mi	Lehigh Valley, PA
ZIP code 18016	0.0 mi	Bethlehem, PA
ZIP code 18067	1.0 mi	Northampton, PA
ZIP code 18037	2.1 mi	Coplay, PA
ZIP code 18032	2.6 mi	Catasauqua, PA
ZIP code 18002	3.0 mi	Lehigh Valley, PA
ZIP code 18052	3.1 mi	Whitehall, PA
ZIP code 18059	3.7 mi	Laurys Station, 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 18001, plotted from its record coordinates.

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

Scope ZIP code 18001. 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.