Rio Hondo Texas ZIP Codes
Rio Hondo holds a single ZIP code.
Every ZIP code in Rio Hondo
| ZIP code | County |
|---|---|
| 78583 | Cameron County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Rio Hondo codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Rio Hondo. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Rio Hondo ZIP code begins 785. Those first three digits identify the sectional center facility that processes mail for this part of Texas. Statewide that range covers 68 ZIP codes, so Rio Hondo accounts for 1% of it.
Every Texas ZIP prefix and the region it covers →
Area codes covering Rio Hondo
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Rio Hondo occupies.
Rio Hondo Texas area codes in full →
Where Rio Hondo's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Rio Hondo
| City | Distance | ZIP codes |
|---|---|---|
| Harlingen Texas ZIP codes | 7.8 mi | 4 ZIP codes |
| San Benito Texas ZIP codes | 8.2 mi | 1 ZIP code |
| Combes Texas ZIP codes | 9.0 mi | 1 ZIP code |
| Los Fresnos Texas ZIP codes | 13 mi | 1 ZIP code |
| Santa Rosa Texas ZIP codes | 15 mi | 1 ZIP code |
| Los Indios Texas ZIP codes | 16 mi | 1 ZIP code |
| La Feria Texas ZIP codes | 16 mi | 1 ZIP code |
| Lyford Texas ZIP codes | 18 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.