Ibaji is one of the twenty-one (21) Local Government Areas (LGAs) in Kogi State, Nigeria, with headquarters is located in the town of Onyedege.
There are several areas located within the LGA that make use of the same postal or zip codes.
Here are the postcode for Ibaji LGA:
| Location | Postcode |
| Aya | 271105 |
| Nokwa | 271105 |
| Onuabo | 271105 |
| Echango | 271105 |
| Obale | 271105 |
| Onyedega | 271105 |
| Echeno | 271105 |
| Obele | 271105 |
| Orofuanefe | 271105 |
| Efe | 271105 |
| Odakupu | 271105 |
| Ugbugbo | 271105 |
| Ejule | 271105 |
| Odeke | 271105 |
| Ugwata | 271105 |
| Ete | 271105 |
| Odomomo | 271105 |
| Ujeh | 271105 |
| Ibaji | 271105 |
| Ofanwa | 271105 |
| Unale | 271105 |
| Ibaoko | 271105 |
| Ofronla | 271105 |
| Ika | 271105 |
| Ogbagwu | 271105 |
| Ikenye | 271105 |
| Ogwu | 271105 |
| Ikola | 271105 |
| Ojila | 271105 |
| Alogwu | 271105 |
| Ikpogwu | 271105 |
| Ojueja | 271105 |
| Amabo | 271105 |
| Ikpoloko | 271105 |
| Okapanaji | 271105 |
| Ani-Ocha | 271105 |
| Inene | 271105 |
| Okwuonoko | 271105 |
| Aniocha II | 271105 |
| Iteti | 271105 |
| Olla | 271105 |
| Arrugo | 271105 |
| Iyano | 271105 |
| Oluknodu | 271105 |
| Adgwu | 271105 |
| Ajankoje | 271105 |
| Ajitata | 271105 |
| Ajmukoje | 271105 |
| Akene | 271105 |
| Akinia | 271105 |
| Akpalobe | 271105 |
| Akpanya | 271105 |
| Akpiola | 271105 |
| Akura | 271105 |
| Alakwa | 271105 |