| Areas |
|---|
| Obio / Akpo, Obio/Akpor |
| All postal codes in Rivers |
|---|
| Abua-Odual |
| Ahoada East |
| Ahoada West |
| Akuku-Toru |
| Andoni |
| Asari-Toru |
| Bonny |
| Degema |
| Eleme |
| Emohua |
| Etche |
| Gokana |
| Ikwerre |
| Khana |
| Obio/Akpor |
| Ogba/Egbema/Ndoni |
| Ogu-Bolo |
| Okrika |
| Omuma |
| Opobo/Nkoro |
| Oyigbo |
| Port Harcourt |
| Tai |