ZIP Code 17889

17889 is one of Pennsylvania's ZIP codes, delivering to addresses in Winfield, Union County.

City: Winfield
County: Union County
State: Pennsylvania
Prefix: 178xx

Where this code sits

17889 is part of the 178xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Winfield.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 17889 delivers to without sharing its boundary.

ZIP codes nearest 17889

The ZIP codes whose reference points sit closest to 17889.
ZIP code	Distance	Delivers to
ZIP code 17876	4.0 mi	Shamokin Dam, PA
ZIP code 17857	4.3 mi	Northumberland, PA
ZIP code 17831	4.3 mi	Hummels Wharf, PA
ZIP code 17870	4.7 mi	Selinsgrove, PA
ZIP code 17850	5.3 mi	Montandon, PA
ZIP code 17801	5.5 mi	Sunbury, PA
ZIP code 17837	5.8 mi	Lewisburg, PA
ZIP code 17855	6.0 mi	New Berlin, 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 17889, plotted from its record coordinates.

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

Scope ZIP code 17889. 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.