Port Isabel Texas ZIP Codes
Port Isabel holds a single ZIP code.
Every ZIP code in Port Isabel
| ZIP code | County |
|---|---|
| 78578 | 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Port Isabel codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Port Isabel. 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 Port Isabel 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 Port Isabel accounts for 1% of it.
Every Texas ZIP prefix and the region it covers →
Area codes covering Port Isabel
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 Port Isabel occupies.
Port Isabel Texas area codes in full →
Where Port Isabel's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Port Isabel
| City | Distance | ZIP codes |
|---|---|---|
| South Padre Island Texas ZIP codes | 6.2 mi | 1 ZIP code |
| Brownsville Texas ZIP codes | 14 mi | 5 ZIP codes |
| Los Fresnos Texas ZIP codes | 15 mi | 1 ZIP code |
| Rio Hondo Texas ZIP codes | 24 mi | 1 ZIP code |
| San Benito Texas ZIP codes | 25 mi | 1 ZIP code |
| Harlingen Texas ZIP codes | 29 mi | 4 ZIP codes |
| Los Indios Texas ZIP codes | 30 mi | 1 ZIP code |
| Combes Texas ZIP codes | 32 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.