ZIP Code 19318

19318 is one of Pennsylvania's ZIP codes, delivering to addresses in Chatham, Chester County.

City: Chatham
County: Chester County
State: Pennsylvania
Prefix: 193xx

Where this code sits

19318 is part of the 193xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Chatham.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 19318 delivers to without sharing its boundary.

ZIP codes nearest 19318

The ZIP codes whose reference points sit closest to 19318.
ZIP code	Distance	Delivers to
ZIP code 19390	2.3 mi	West Grove, PA
ZIP code 19311	3.1 mi	Avondale, PA
ZIP code 19374	3.2 mi	Toughkenamon, PA
ZIP code 19346	4.6 mi	Kelton, PA
ZIP code 19345	4.9 mi	Immaculata, PA
ZIP code 19375	5.1 mi	Unionville, PA
ZIP code 19348	5.9 mi	Kennett Square, PA
ZIP code 19350	6.0 mi	Landenberg, 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 19318, plotted from its record coordinates.

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

Scope ZIP code 19318. 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.