ZIP Code 17120

17120 is one of Pennsylvania's ZIP codes, delivering to addresses in Harrisburg, Dauphin County.

City

Harrisburg

County

Dauphin County

State

Pennsylvania

Prefix

171xx

Where this code sits

17120 is part of the 171xx range, the group of codes handled by one mail processing centre. Harrisburg is served by 26 ZIP codes in total; the full list, with the county each falls in, is on the Harrisburg page.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 17120 delivers to without sharing its boundary.

ZIP codes nearest 17120

The ZIP codes whose reference points sit closest to 17120.
ZIP code	Distance	Delivers to
ZIP code 17125	0.0 mi	Harrisburg, PA
ZIP code 17123	0.1 mi	Harrisburg, PA
ZIP code 17124	0.2 mi	Harrisburg, PA
ZIP code 17101	0.3 mi	Harrisburg, PA
ZIP code 17126	0.3 mi	Harrisburg, PA
ZIP code 17127	0.3 mi	Harrisburg, PA
ZIP code 17129	0.3 mi	Harrisburg, PA
ZIP code 17130	0.3 mi	Harrisburg, 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 17120, plotted from its record coordinates.

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

Scope ZIP code 17120. 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.