ZIP Code 16638

16638 is one of Pennsylvania's ZIP codes, delivering to addresses in Entriken, Huntingdon County.

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

Where this code sits

16638 is part of the 166xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Entriken.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 16638 delivers to without sharing its boundary.

ZIP codes nearest 16638

The ZIP codes whose reference points sit closest to 16638.
ZIP code	Distance	Delivers to
ZIP code 16657	1.7 mi	James Creek, PA
ZIP code 16693	5.6 mi	Williamsburg, PA
ZIP code 16647	6.6 mi	Hesston, PA
ZIP code 16662	7.1 mi	Martinsburg, PA
ZIP code 16685	7.8 mi	Todd, PA
ZIP code 16678	8.1 mi	Saxton, PA
ZIP code 16631	8.4 mi	Curryville, PA
ZIP code 16634	8.9 mi	Dudley, 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 16638, plotted from its record coordinates.

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

Scope ZIP code 16638. 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.