ZIP Code 78009

78009 is one of Texas's ZIP codes, delivering to addresses in Castroville, Medina County.

City: Castroville
County: Medina County
State: Texas
Prefix: 780xx

Where this code sits

78009 is part of the 780xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Castroville.

Castroville Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78009 delivers to without sharing its boundary.

ZIP codes nearest 78009

The ZIP codes whose reference points sit closest to 78009.
ZIP code	Distance	Delivers to
ZIP code 78039	5.3 mi	La Coste, TX
ZIP code 78066	7.4 mi	Rio Medina, TX
ZIP code 78052	9.8 mi	Lytle, TX
ZIP code 78059	10 mi	Natalia, TX
ZIP code 78002	10 mi	Atascosa, TX
ZIP code 78253	11 mi	San Antonio, TX
ZIP code 78054	12 mi	Macdona, TX
ZIP code 78245	12 mi	San Antonio, TX

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 78009, plotted from its record coordinates.

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

Scope ZIP code 78009. 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.