ZIP Codes Near 78578 — Port Isabel, TX
There are 8 ZIP codes within 25 miles of 78578, covering 6 cities and towns. Distances are straight-line between ZIP centroids, not driving distance.
Cities within 25 miles
| City | Distance | ZIP codes |
|---|---|---|
| Brownsville, TX | 7.1 mi | 3 |
| Los Fresnos, TX | 9.0 mi | 1 |
| Olmito, TX | 15.0 mi | 1 |
| South Padre Island, TX | 15.1 mi | 1 |
| Rio Hondo, TX | 18.6 mi | 1 |
| San Benito, TX | 21.2 mi | 1 |
All 8 ZIP codes, by distance
| ZIP | City | County | Distance |
|---|---|---|---|
| 78521 | Brownsville, TX | Cameron | 7.1 mi |
| 78566 | Los Fresnos, TX | Cameron | 9.0 mi |
| 78526 | Brownsville, TX | Cameron | 9.5 mi |
| 78575 | Olmito, TX | Cameron | 15.0 mi |
| 78597 | South Padre Island, TX | Cameron | 15.1 mi |
| 78520 | Brownsville, TX | Cameron | 16.1 mi |
| 78583 | Rio Hondo, TX | Cameron | 18.6 mi |
| 78586 | San Benito, TX | Cameron | 21.2 mi |
How this list is calculated
Each ZIP code is represented by a single centroid point, and distance is measured great-circle from the centroid of 78578 to each of the others. Two consequences worth knowing about:
- Large rural ZIPs distort the picture. A ZIP covering 400 square miles has a centroid that may be 15 miles from its own nearest edge, so a code listed as 30 miles away can begin much closer.
- These are not driving distances. A river, a bay, or a mountain range makes a 12-mile straight line into a 40-minute drive. For service-area planning, use this as a first cut and check the routes.
If you need this programmatically — for a store locator, a delivery zone, or a territory map — the radius endpoint returns the same data as JSON, with an arbitrary radius and optional state filtering.
Back to 78578
County, time zone, area codes, and the full ZIP+4 lookup for any address in Port Isabel.