| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Cabeço, Montalvo | 2250-211 |
| Postal/ZIP Codes in Constância, Montalvo | 2250-271 |
| Postal/ZIP Codes in Guardas, Montalvo | 2250-243 |
| Postal/ZIP Codes in Lameirinho, Montalvo | 2250-215 |
| Postal/ZIP Codes in Montalvo, Montalvo | 2250 |
| Postal/ZIP Codes in Ulmeirinho, Montalvo | 2250-272 |
| Postal/ZIP Codes in Zona Industrial de Montalvo, Montalvo | 2250-273 |