ZIP Code 19421

19421 is one of Pennsylvania's ZIP codes, delivering to addresses in Birchrunville, Chester County.

City: Birchrunville
County: Chester County
State: Pennsylvania
Prefix: 194xx

Where this code sits

19421 is part of the 194xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Birchrunville.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 19421 delivers to without sharing its boundary.

ZIP codes nearest 19421

The ZIP codes whose reference points sit closest to 19421.
ZIP code	Distance	Delivers to
ZIP code 19376	0.0 mi	Wagontown, PA
ZIP code 19397	0.0 mi	Southeastern, PA
ZIP code 19398	0.0 mi	Southeastern, PA
ZIP code 19399	0.0 mi	Southeastern, PA
ZIP code 19372	1.2 mi	Thorndale, PA
ZIP code 19335	2.8 mi	Downingtown, PA
ZIP code 19358	3.2 mi	Modena, PA
ZIP code 19320	4.1 mi	Coatesville, 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 19421, plotted from its record coordinates.

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

Scope ZIP code 19421. 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.