ZIP Code 18331

18331 is one of Pennsylvania's ZIP codes, delivering to addresses in Gilbert, Monroe County.

City: Gilbert
County: Monroe County
State: Pennsylvania
Prefix: 183xx

Where this code sits

18331 is part of the 183xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Gilbert.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 18331 delivers to without sharing its boundary.

ZIP codes nearest 18331

The ZIP codes whose reference points sit closest to 18331.
ZIP code	Distance	Delivers to
ZIP code 18322	1.9 mi	Brodheadsville, PA
ZIP code 18058	2.4 mi	Kunkletown, PA
ZIP code 18353	3.5 mi	Saylorsburg, PA
ZIP code 18333	4.0 mi	Kresgeville, PA
ZIP code 18330	4.2 mi	Effort, PA
ZIP code 18354	5.7 mi	Sciota, PA
ZIP code 18091	8.4 mi	Wind Gap, PA
ZIP code 18352	9.1 mi	Reeders, 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 18331, plotted from its record coordinates.

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

Scope ZIP code 18331. 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.