Founded in 1848, Starr County is one of 254 counties in the state of Texas. Historically, Starr County was formed from Nueces County. The city of Rio Grande City is the county seat. With FIPS code of 427, Starr County has a population of 66,049 and area of 1,223 square miles (3,168 km2).
List of all cities in Starr County, TX alphabetically
| City/Town | Postal Code | Area Code |
| Delmita, TX | 78536 | 956 |
| El Centro, TX | 78536 | 956 |
| El Sauz, TX | 78582 | 956 |
| Escobares, TX | 78582 | 956 |
| Falcon, TX | 78584 | 956 |
| Falcon Heights, TX | 78545 | 956 |
| Falcon Village, TX | 78545 | 956 |
| Fort Ringgold, TX | 78582 | 956 |
| Fronton, TX | 78584 | 956 |
| Garceno, TX | 78582 | 956 |
| Garciasville, TX | 78547 | 956 |
| Grulla, TX | 78548 | 956 |
| La Casita, TX | 78582 | 956 |
| La Gloria, TX | 78591 | 956 |
| La Reforma, TX | 78536 | 956 |
| Los Saenz, TX | 78584 | 956 |
| Rincon, TX | 78582 | 956 |
| Rio Grande, TX | 78582 | 956 |
| Rio Grande City, TX | 78582 | 956 |
| Roma, TX | 78584 | 956 |
| Salineno, TX | 78585 | 956 |
| San Isidro, TX | 78588 | 956 |
| Santa Catarina, TX | 78582 | 956 |
| Santa Cruz, TX | 78582 | 956 |
| Santa Elena, TX | 78591 | 956 |
| Villareales, TX | 78582 | 956 |