ZIP Code 18351

18351 is one of Pennsylvania's ZIP codes, delivering to addresses in Portland, Northampton County.

City: Portland
County: Northampton County
State: Pennsylvania
Prefix: 183xx

Where this code sits

18351 is part of the 183xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Portland.

Portland Pennsylvania ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 18351 delivers to without sharing its boundary.

ZIP codes nearest 18351

The ZIP codes whose reference points sit closest to 18351.
ZIP code	Distance	Delivers to
ZIP code 18343	1.6 mi	Mount Bethel, PA
ZIP code 07832	2.5 mi	Columbia, NJ
ZIP code 07833	2.6 mi	Delaware, NJ
ZIP code 18327	4.7 mi	Delaware Water Gap, PA
ZIP code 18341	5.8 mi	Minisink Hills, PA
ZIP code 07844	5.9 mi	Hope, NJ
ZIP code 18013	6.1 mi	Bangor, PA
ZIP code 18356	6.3 mi	Shawnee On Delaware, 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 18351, plotted from its record coordinates.

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

Scope ZIP code 18351. 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.