ZIP Code 78021

78021 is one of Texas's ZIP codes, delivering to addresses in Fowlerton, La Salle County.

City: Fowlerton
County: La Salle County
State: Texas
Prefix: 780xx

Where this code sits

78021 is part of the 780xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Fowlerton.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78021 delivers to without sharing its boundary.

830 Area code 830

ZIP codes nearest 78021

The ZIP codes whose reference points sit closest to 78021.
ZIP code	Distance	Delivers to
ZIP code 78072	18 mi	Tilden, TX
ZIP code 78014	23 mi	Cotulla, TX
ZIP code 78017	24 mi	Dilley, TX
ZIP code 78011	27 mi	Charlotte, TX
ZIP code 78012	30 mi	Christine, TX
ZIP code 78001	30 mi	Artesia Wells, TX
ZIP code 78007	31 mi	Calliham, TX
ZIP code 78061	32 mi	Pearsall, 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 78021, plotted from its record coordinates.

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

Scope ZIP code 78021. 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.