| Ort | Postleitzahl |
|---|---|
| Anieze, Okpai | 322127 |
| Ashaka-Okpai, Okpai | 322127 |
| Ibusa, Okpai | 322127 |
| Obi-Ekuku, Okpai | 322127 |
| Obi-Usuani, Okpai | 322127 |
| Obodoyibo, Okpai | 322127 |
| Okpai-Obeze, Okpai | 322127 |
| Okpai-Oluchi, Okpai | 322127 |
| Umuagulu, Okpai | 322127 |
| Umuedem, Okpai | 322127 |
| Umugbome, Okpai | 322127 |