ZIP Code 78548

78548 is one of Texas's ZIP codes, delivering to addresses in Grulla, Starr County.

City: Grulla
County: Starr County
State: Texas
Prefix: 785xx

Where this code sits

78548 is part of the 785xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Grulla.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78548 delivers to without sharing its boundary.

956 Area code 956

ZIP codes nearest 78548

The ZIP codes whose reference points sit closest to 78548.
ZIP code	Distance	Delivers to
ZIP code 78547	4.2 mi	Garciasville, TX
ZIP code 78595	5.4 mi	Sullivan City, TX
ZIP code 78565	6.2 mi	Los Ebanos, TX
ZIP code 78560	11 mi	La Joya, TX
ZIP code 78582	12 mi	Rio Grande City, TX
ZIP code 78576	13 mi	Penitas, TX
ZIP code 78574	17 mi	Mission, TX
ZIP code 78572	21 mi	Mission, 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 78548, plotted from its record coordinates.

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

Scope ZIP code 78548. 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.