| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in San José Frontera, San Martín | S2401 XAB |
| Postal/ZIP Codes in San Martín de las Escobas, San Martín | S2449 |
| Postal/ZIP Codes in Sastre, San Martín | S2440 |
| Postal/ZIP Codes in Schiffner, San Martín | S2451 XAC |
| Postal/ZIP Codes in Tais, San Martín | S2535 XAA |
| Postal/ZIP Codes in Traill, San Martín | S2456 XAC |
| Postal/ZIP Codes in Wildermuth, San Martín | S2257 XAB |