ZIP Code 16634

16634 is one of Pennsylvania's ZIP codes, delivering to addresses in Dudley, Huntingdon County.

City: Dudley
County: Huntingdon County
State: Pennsylvania
Prefix: 166xx

Where this code sits

16634 is part of the 166xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Dudley.

Dudley Pennsylvania ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 16634 delivers to without sharing its boundary.

ZIP codes nearest 16634

The ZIP codes whose reference points sit closest to 16634.
ZIP code	Distance	Delivers to
ZIP code 16621	2.2 mi	Broad Top, PA
ZIP code 16694	3.6 mi	Wood, PA
ZIP code 16679	3.6 mi	Six Mile Run, PA
ZIP code 16678	3.7 mi	Saxton, PA
ZIP code 16674	4.1 mi	Robertsdale, PA
ZIP code 16633	4.2 mi	Defiance, PA
ZIP code 16672	4.9 mi	Riddlesburg, PA
ZIP code 16685	7.1 mi	Todd, 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 16634, plotted from its record coordinates.

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

Scope ZIP code 16634. 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.