ZIP Code 78590

78590 is one of Texas's ZIP codes, delivering to addresses in San Perlita, Willacy County.

City: San Perlita
County: Willacy County
State: Texas
Prefix: 785xx

Where this code sits

78590 is part of the 785xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to San Perlita.

San Perlita Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78590 delivers to without sharing its boundary.

956 Area code 956

ZIP codes nearest 78590

The ZIP codes whose reference points sit closest to 78590.
ZIP code	Distance	Delivers to
ZIP code 78580	9.8 mi	Raymondville, TX
ZIP code 78569	11 mi	Lyford, TX
ZIP code 78598	14 mi	Port Mansfield, TX
ZIP code 78594	15 mi	Sebastian, TX
ZIP code 78561	17 mi	Lasara, TX
ZIP code 78551	18 mi	Harlingen, TX
ZIP code 78535	19 mi	Combes, TX
ZIP code 78583	19 mi	Rio Hondo, 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 78590, plotted from its record coordinates.

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

Scope ZIP code 78590. 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.