Andoni Local Government Area in Rivers State uses the postal code 503102.
Here is the postal code for Andoni:
| Place/Area | Postal code |
| Okwaniok | 503102 |
| Oloma | 503102 |
| Otak | 503102 |
| Otiga | 503102 |
| Otuafik | 503102 |
| Otudon | 503102 |
| Otugan | 503102 |
| Oyookoto | 503102 |
| Samanga | 503102 |
| Uyeada | 503102 |
| Uyengala | 503102 |
| Weret | 503102 |
| Okukpoi | 503102 |
| Anyama-Aganna | 503102 |
| Echitcham | 503102 |
| Iwo | 503102 |
| Anyamaboko | 503102 |
| Egbomu | 503102 |
| Iwoogone | 503102 |
| Asakokola | 503102 |
| Egbormu | 503102 |
| Kapamant | 503102 |
| Asakokolo | 503102 |
| Egwede | 503102 |
| Kwake | 503102 |
| Asarama | 503102 |
| Ekede | 503102 |
| Mertege | 503102 |
| Asuk-Ama | 503102 |
| Friday | 503102 |
| Muma | 503102 |
| Asuk-Oyet | 503102 |
| Glilea | 503102 |
| Nchiama | 503102 |
| Asurubaa | 503102 |
| Ibotobom | 503102 |
| Ngo | 503102 |
| Ataba | 503102 |
| Ibotokpon | 503102 |
| Obiama | 503102 |
| Aturube | 503102 |
| Ichama | 503102 |
| Obot-Usut | 503102 |
| Ayama | 503102 |
| Igbanga | 503102 |
| Obukolum | 503102 |
| Darile | 503102 |
| Ikuru | 503102 |
| Ogbidim | 503102 |
| Dema | 503102 |
| Inyoukpo | 503102 |
| Okokiri | 503102 |
| Amaoke | 503102 |
| Dimama | 503102 |
| Isidum | 503102 |
| Okoro Iro | 503102 |
| Amatamuno | 503102 |
| Ebon-Okolo | 503102 |
| Isioke | 503102 |
| Okorolo | 503102 |
| Anyama | 503102 |
| Ebuguma | 503102 |
| Isiokwan | 503102 |
| Aam-Ekut | 503102 |
| Aama-Runner | 503102 |
| Afradiki | 503102 |
| Aganna | 503102 |
| Aganofor | 503102 |
| Agbachichama | 503102 |
| Agbadama | 503102 |
| Agbadem | 503102 |
| Agbakoroma | 503102 |
| Agwut Obolo | 503102 |
| Ama Sunday | 503102 |
| Amanku | 503102 |
| Amansa | 503102 |