Zip Code | City | Population |
|---|---|---|
| 78521 | Brownsville | 87,040 |
| 78520 | Brownsville | 62,344 |
| 78526 | Brownsville | 59,547 |
| 78550 | Harlingen | 54,441 |
| 78586 | San Benito | 49,504 |
| 78552 | Harlingen | 40,824 |
| 78566 | Los Fresnos | 24,232 |
| 78559 | La Feria | 12,973 |
| 78578 | Port Isabel | 10,540 |
| 78583 | Rio Hondo | 6,384 |
| 78593 | Santa Rosa | 5,015 |
| 78575 | Olmito | 4,649 |
| 78597 | South Padre Island | 2,386 |
| 78535 | Combes | 633 |
| 78592 | Santa Maria | 587 |
| 78567 | Los Indios | 484 |