ZIP Code 78582

78582 is one of Texas's ZIP codes, delivering to addresses in Rio Grande City, Starr County.

City: Rio Grande City
County: Starr County
State: Texas
Prefix: 785xx

Where this code sits

78582 is part of the 785xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Rio Grande City.

Rio Grande City Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78582 delivers to without sharing its boundary.

956 Area code 956

ZIP codes nearest 78582

The ZIP codes whose reference points sit closest to 78582.
ZIP code	Distance	Delivers to
ZIP code 78547	8.5 mi	Garciasville, TX
ZIP code 78584	12 mi	Roma, TX
ZIP code 78548	12 mi	Grulla, TX
ZIP code 78595	18 mi	Sullivan City, TX
ZIP code 78565	19 mi	Los Ebanos, TX
ZIP code 78585	21 mi	Salineno, TX
ZIP code 78591	22 mi	Santa Elena, TX
ZIP code 78545	23 mi	Falcon Heights, 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 78582, plotted from its record coordinates.

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

Scope ZIP code 78582. 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.