| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Puesto San Miguel, San Martín | M5582 XBB |
| Postal/ZIP Codes in Puesto Santa María, San Martín | M5582 XBC |
| Postal/ZIP Codes in Puesto Vega, San Martín | M5582 XBA |
| Postal/ZIP Codes in Reina, San Martín | M5584 XAB |
| Postal/ZIP Codes in Reyes, San Martín | M5589 XAC |
| Postal/ZIP Codes in Ruta 7 Kilometro 1014, San Martín | M5582 XBH |
| Postal/ZIP Codes in San Martín, San Martín | M5570 |
| Postal/ZIP Codes in Tapera Negra, San Martín | M5582 XBD |
| Postal/ZIP Codes in Tres Porteñas, San Martín | M5637 |
| Postal/ZIP Codes in Villa Centenario, San Martín | M5570 XAB |
| Postal/ZIP Codes in Villa del Carmen, San Martín | M5570 XAC |