Danja is one of the thirty-four (34) Local Government Areas (LGAs) in Katsina State, Nigeria.
There are several areas located within the LGA that make use of the same postal or zip codes.
Here are the postcodes for Danja LGA:
| Location | Postcode |
| Dabai | 831102 |
| Danja | 831102 |
| Jiba | 831102 |
| Kahutu | 831102 |
| Tandama | 831102 |
| Tsaugamuwa | 831102 |
| Yakaji | 831102 |