ZIP Code 78583

78583 is one of Texas's ZIP codes, delivering to addresses in Rio Hondo, Cameron County.

City: Rio Hondo
County: Cameron County
State: Texas
Prefix: 785xx

Where this code sits

78583 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 Hondo.

Rio Hondo Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78583 delivers to without sharing its boundary.

956 Area code 956

ZIP codes nearest 78583

The ZIP codes whose reference points sit closest to 78583.
ZIP code	Distance	Delivers to
ZIP code 78568	3.1 mi	Lozano, TX
ZIP code 78550	8.9 mi	Harlingen, TX
ZIP code 78586	9.0 mi	San Benito, TX
ZIP code 78553	9.5 mi	Harlingen, TX
ZIP code 78551	11 mi	Harlingen, TX
ZIP code 78535	12 mi	Combes, TX
ZIP code 78566	12 mi	Los Fresnos, TX
ZIP code 78552	13 mi	Harlingen, 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 78583, plotted from its record coordinates.

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

Scope ZIP code 78583. 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.