ZIP Code 17857

17857 is one of Pennsylvania's ZIP codes, delivering to addresses in Northumberland, Northumberland County.

City: Northumberland
County: Northumberland County
State: Pennsylvania
Prefix: 178xx

Where this code sits

17857 is part of the 178xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Northumberland.

Northumberland Pennsylvania ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 17857 delivers to without sharing its boundary.

ZIP codes nearest 17857

The ZIP codes whose reference points sit closest to 17857.
ZIP code	Distance	Delivers to
ZIP code 17801	3.5 mi	Sunbury, PA
ZIP code 17889	4.3 mi	Winfield, PA
ZIP code 17876	4.4 mi	Shamokin Dam, PA
ZIP code 17831	5.4 mi	Hummels Wharf, PA
ZIP code 17850	5.5 mi	Montandon, PA
ZIP code 17865	6.2 mi	Potts Grove, PA
ZIP code 17877	6.7 mi	Snydertown, PA
ZIP code 17870	7.0 mi	Selinsgrove, 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 17857, plotted from its record coordinates.

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

Scope ZIP code 17857. 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.