Ibaji is one of the twenty-one (21) Local Government Areas (LGAs) in Kogi State, Nigeria, with headquarters located in Onyedege.
There are several areas located within the LGA that make use of the same postal or zip codes.
Here are the postal code for Ibaji LGA:
| Location | Postal Code |
| 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 |