| Place | Postal Code |
|---|---|
| Ojamonogwu, Okpo | 270107 |
| Ojuwo-Ochekwu, Okpo | 270107 |
| Okpe, Okpo | 270107 |
| Okpo, Okpo | 270107 |
| Onugba, Okpo | 270107 |
| Opu, Okpo | 270107 |
| Otakpa, Okpo | 270107 |
| Otakwuihi, Okpo | 270107 |
| Otuapa, Okpo | 270107 |
| Owosho, Okpo | 270107 |
| Ubalu, Okpo | 270107 |
| Uefodo, Okpo | 270107 |
| Ugbogbo-Iga, Okpo | 270107 |
| Ugbologidi, Okpo | 270107 |
| Ugojo, Okpo | 270107 |
| Postal Codes in Olamaboro | |
|---|---|
| Imani, Olamaboro | |
| Ogodu, Olamaboro | |
| Okpo, Olamaboro | |