ZIP Code 16420

16420 is one of Pennsylvania's ZIP codes, delivering to addresses in Grand Valley, Warren County.

City: Grand Valley
County: Warren County
State: Pennsylvania
Prefix: 164xx

Where this code sits

16420 is part of the 164xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Grand Valley.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 16420 delivers to without sharing its boundary.

ZIP codes nearest 16420

The ZIP codes whose reference points sit closest to 16420.
ZIP code	Distance	Delivers to
ZIP code 16341	7.7 mi	Pleasantville, PA
ZIP code 16354	8.2 mi	Titusville, PA
ZIP code 16351	8.9 mi	Tidioute, PA
ZIP code 16328	9.8 mi	Hydetown, PA
ZIP code 16434	9.8 mi	Spartansburg, PA
ZIP code 16416	9.9 mi	Garland, PA
ZIP code 16321	11 mi	East Hickory, PA
ZIP code 16322	11 mi	Endeavor, 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 16420, plotted from its record coordinates.

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

Scope ZIP code 16420. 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.