Danja Local Government Area in Katsina State uses postal codes is 831102.
Here are the postal codes for the towns and districts in Danja:
| Place/Area | Postal Code |
| Dabai | 831102 |
| Danja | 831102 |
| Jiba | 831102 |
| Kahutu | 831102 |
| Tandama | 831102 |
| Tsaugamuwa | 831102 |
| Yakaji | 831102 |