Obio-Akpo is one of the twenty-three (23) Local Government Areas (LGAs) in Rivers State, Nigeria. Its headquarters are located in the town of Rumuodumaya.
Locations within the LGA make use of the same postal or zip code.
Here’s the postcode for areas in Obio-Akpo:
| Location | Postcode |
| Ogbogoro | 500102 |
| Rumuepirikom | 500102 |
| Rumuomoi | 500102 |
| Oginigba | 500102 |
| Rumuewhara | 500102 |
| Rumuosi | 500102 |
| Ore- Igwe | 500102 |
| Rumuibekwe | 500102 |
| Rumuoto | 500102 |
| Rukpokwo | 500102 |
| Rumuigbo | 500102 |
| Rumurolu | 500102 |
| Rukpolu -Obio | 500102 |
| Rumumduru | 500102 |
| Rumusara | 500102 |
| Rumolumeni | 500102 |
| Rumuodara | 500102 |
| Rumuwaji | 500102 |
| Rumu -okwurusi | 500102 |
| Rumuodomaya | 500102 |
| Rumuwegwu | 500102 |
| Rumuadaolu | 500102 |
| Rumuoji | 500102 |
| Runuobiakani | 500102 |
| Rumuahalu | 500102 |
| Rumuokoro | 500102 |
| Uzuoba | 500102 |
| Rumuchiorlu | 500102 |
| Rumuokro | 500102 |
| Woji | 500102 |
| Rumudogo | 500102 |
| Rumuokwachi | 500102 |
| Rumuegba | 500102 |
| Rumuokwuota | 500102 |
| Rumuekini | 500102 |
| Rumuokwurusi | 500102 |
| Rumuekwe | 500102 |
| Rumuola | 500102 |
| Rumueme | 500102 |
| Rumuolukwu | 500102 |
| Rumuepirieli | 500102 |
| Rumuomasi | 500102 |
| Alakahia | 500102 |
| Atali | 500102 |
| Cheba | 500102 |
| Egbelu | 500102 |
| Elelenwe | 500102 |
| Elimgbu | 500102 |
| Eliozu | 500102 |
| Elipparanwo | 500102 |
| Eneka | 500102 |
| Iriebe | 500102 |
| Iwofe | 500102 |
| Megbuesilaru | 500102 |
| Mgbuoba | 500102 |
| Mpakurche | 500102 |
| Nkpa | 500102 |
| Nkpelu-p | 500102 |