ZIP Code 19731

19731 is one of Delaware's ZIP codes, delivering to addresses in Port Penn, New Castle County.

City: Port Penn
County: New Castle County
State: Delaware
Prefix: 197xx

Where this code sits

19731 is part of the 197xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Port Penn.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 19731 delivers to without sharing its boundary.

302 Area code 302

ZIP codes nearest 19731

The ZIP codes whose reference points sit closest to 19731.
ZIP code	Distance	Delivers to
ZIP code 19712	3.6 mi	Newark, DE
ZIP code 19714	3.6 mi	Newark, DE
ZIP code 19715	3.6 mi	Newark, DE
ZIP code 19718	3.6 mi	Newark, DE
ZIP code 19721	3.6 mi	New Castle, DE
ZIP code 19725	3.6 mi	Newark, DE
ZIP code 19850	3.6 mi	Wilmington, DE
ZIP code 19880	3.6 mi	Wilmington, DE

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 19731, plotted from its record coordinates.

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

Scope ZIP code 19731. 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.