| Place | Postal Code |
|---|---|
| Agu Orba, Orba | 412110 |
| Ajuona, Orba | 412110 |
| Amalla, Orba | 412110 |
| Amaoba, Orba | 412110 |
| Oham, Orba | 412110 |
| Ohebe-Orba, Orba | 412110 |
| Owerri Amagu, Orba | 412110 |
| Owerri-Ezeorba, Orba | 412110 |
| Owerri-Okpu, Orba | 412110 |
| Umu-Ugwu, Orba | 412110 |
| Umunkpume, Orba | 412110 |