ZIP Code 16021

16021 is one of Pennsylvania's ZIP codes, delivering to addresses in Branchton, Butler County.

City: Branchton
County: Butler County
State: Pennsylvania
Prefix: 160xx

Where this code sits

16021 is part of the 160xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Branchton.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 16021 delivers to without sharing its boundary.

ZIP codes nearest 16021

The ZIP codes whose reference points sit closest to 16021.
ZIP code	Distance	Delivers to
ZIP code 16035	2.6 mi	Forestville, PA
ZIP code 16057	3.7 mi	Slippery Rock, PA
ZIP code 16020	4.9 mi	Boyers, PA
ZIP code 16016	5.1 mi	Boyers, PA
ZIP code 16038	6.3 mi	Harrisville, PA
ZIP code 16061	7.5 mi	West Sunbury, PA
ZIP code 16127	8.0 mi	Grove City, PA
ZIP code 16040	8.8 mi	Hilliards, 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 16021, plotted from its record coordinates.

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

Scope ZIP code 16021. 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.