ZIP Code 17856

17856 is one of Pennsylvania's ZIP codes, delivering to addresses in New Columbia, Union County.

City: New Columbia
County: Union County
State: Pennsylvania
Prefix: 178xx

Where this code sits

17856 is part of the 178xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to New Columbia.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 17856 delivers to without sharing its boundary.

ZIP codes nearest 17856

The ZIP codes whose reference points sit closest to 17856.
ZIP code	Distance	Delivers to
ZIP code 17887	2.1 mi	White Deer, PA
ZIP code 17886	3.0 mi	West Milton, PA
ZIP code 17730	4.0 mi	Dewart, PA
ZIP code 17847	4.1 mi	Milton, PA
ZIP code 17777	4.2 mi	Watsontown, PA
ZIP code 17749	4.5 mi	Mc Ewensville, PA
ZIP code 17837	5.8 mi	Lewisburg, PA
ZIP code 17810	6.2 mi	Allenwood, 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 17856, plotted from its record coordinates.

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

Scope ZIP code 17856. 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.