ZIP Code 78591

78591 is one of Texas's ZIP codes, delivering to addresses in Santa Elena, Starr County.

City: Santa Elena
County: Starr County
State: Texas
Prefix: 785xx

Where this code sits

78591 is part of the 785xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Santa Elena.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78591 delivers to without sharing its boundary.

956 Area code 956

ZIP codes nearest 78591

The ZIP codes whose reference points sit closest to 78591.
ZIP code	Distance	Delivers to
ZIP code 78536	9.3 mi	Delmita, TX
ZIP code 78588	10 mi	San Isidro, TX
ZIP code 78563	17 mi	Linn, TX
ZIP code 78541	17 mi	Edinburg, TX
ZIP code 78547	20 mi	Garciasville, TX
ZIP code 78574	20 mi	Mission, TX
ZIP code 78576	21 mi	Penitas, TX
ZIP code 78595	22 mi	Sullivan City, 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 78591, plotted from its record coordinates.

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

Scope ZIP code 78591. 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.