ZIP Code 17020

17020 is one of Pennsylvania's ZIP codes, delivering to addresses in Duncannon, Perry County.

City: Duncannon
County: Perry County
State: Pennsylvania
Prefix: 170xx

Where this code sits

17020 is part of the 170xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Duncannon.

Duncannon Pennsylvania ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 17020 delivers to without sharing its boundary.

ZIP codes nearest 17020

The ZIP codes whose reference points sit closest to 17020.
ZIP code	Distance	Delivers to
ZIP code 17069	5.2 mi	New Buffalo, PA
ZIP code 17053	6.4 mi	Marysville, PA
ZIP code 17018	6.5 mi	Dauphin, PA
ZIP code 17068	7.7 mi	New Bloomfield, PA
ZIP code 17074	8.1 mi	Newport, PA
ZIP code 17090	8.9 mi	Shermans Dale, PA
ZIP code 17093	9.3 mi	Summerdale, PA
ZIP code 17032	9.3 mi	Halifax, 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 17020, plotted from its record coordinates.

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

Scope ZIP code 17020. 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.