| Postal Code | Postal Code Place Name | State | Municipality |
|---|---|---|---|
| 87730 | San Carlos | Tamaulipas | San Carlos |
| 87733 | Benito Juárez (La Coma) | Tamaulipas | San Carlos |
| 87735 | El Gavilán (Ejido) | Tamaulipas | San Carlos |
| 87737 | Boca de Álamos | Tamaulipas | San Carlos |
| 87738 | Marmolejo (Ejido) | Tamaulipas | San Carlos |
| 87739 | Unión Morales (Ejido) | Tamaulipas | San Carlos |
| 87740 | San Andrés | Tamaulipas | San Carlos |
| 87743 | Victor Manuel Bueno (Ejido) | Tamaulipas | San Carlos |
| 87744 | Praxedis Balboa (Ejido) | Tamaulipas | San Carlos |
| 87746 | Nuevo San Antonio ( Ejido) | Tamaulipas | San Carlos |
| 87747 | Los Angelitos | Tamaulipas | San Carlos |
| 87748 | El Saucillo (Ejido) | Tamaulipas | San Carlos |
| 87750 | Los Quiotes (Ejido) | Tamaulipas | San Carlos |
| 87755 | Puerto Rico (Ejido) | Tamaulipas | San Carlos |