9 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 78582 | Rio Grande City | 44,988 |
| 78584 | Roma | 17,721 |
| 78548 | Grulla | 1,384 |
| 78545 | Falcon Heights | 444 |
| 78536 | Delmita | 404 |
| 78547 | Garciasville | 358 |
| 78591 | Santa Elena | 270 |
| 78588 | San Isidro | 124 |
| 78585 | Salineno | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 9 ZCTAs in Starr County, Texas (US Census).