| Place | Post Code |
|---|---|
| Agbalenyi, Ojo River | 401145 |
| Agu-Ugwu, Ojo River | 401145 |
| Central, Ojo River | 401145 |
| Dodo, Ojo River | 401145 |
| Ojia-Oyi, Ojo River | 401145 |
| Ojinato, Ojo River | 401145 |
| Ugwunzu, Ojo River | 401145 |
| All postal codes in Oji River | |
|---|---|
| Achi, Oji River | |
| Akpugeze, Oji River | |
| Awlaw, Oji River | |
| Inyi, Oji River | |
| Ojo River, Oji River | |
| Ugwuoba, Oji River | |