Onitsha North & South is a Local Government Area (LGA) in Anambra State, Nigeria. The postal codes in Onitsha South are primarily 430104 – 430273.
Here are the postal codes of the streets and districts in Onitsha North & South:
| Area/Place | Postcode |
| Three Three I | 430213 |
| GRA II | 430273 |
| Ogidi | 434234 |
| Awka Road | 430231 |
| Umuota | 434242 |
| Obompa | 430232 |
| Umuota | 434242 |
| Uper Iweka | 430233 |
| Ejikeme Quarters | 434243 |
| Onyeabo Street | 430234 |
| Omagba Layout Phase I & II | 430235 |
| Akuzor Village | 432214 |
| Iweka Road | 430251 |
| Nkpor New Market | 434212 |
| Zik A | 430252 |
| Agulu A | 434213 |
| Niger Bridge Head Road | 430254 |
| Oguta Road | 430261 |
| Odume Layout II | 434221 |
| New Market Road | 430262 |
| Odume Layout I | 434222 |
| Ose I | 430263 |
| Akuzor Road | 434223 |
| Odoakpu | 430264 |
| Ububa | 434224 |
| Ose II | 430271 |
| Uruowulu Village | 434231 |
| Amafor | 434232 |
| GRA I | 430272 |
| Umusiome Ibo | 434233 |