| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Dobreć, Opatija | 51415 |
| Postal/ZIP Codes in Ičići, Opatija | 51410 |
| Postal/ZIP Codes in Ika, Opatija | 51410 |
| Postal/ZIP Codes in Mala Učka, Opatija | 51414 |
| Postal/ZIP Codes in Opatija, Opatija | 51410 |
| Postal/ZIP Codes in Oprič, Opatija | 51410, 51415 |
| Postal/ZIP Codes in Pobri, Opatija | 51211 |
| Postal/ZIP Codes in Poljane, Opatija | 51410 |
| Postal/ZIP Codes in Vela Učka, Opatija | 51410 |
| Postal/ZIP Codes in Veprinac, Opatija | 51410 |