Biriniwa is one of the 27 Local Government Areas (LGAs) in Jigawa State, Nigeria. Its headquarters is located in the town of Biriniwa.
All the areas located within the LGA make use of the same postal codes.
Here are the postcodes for Biriniwa LGA:
| Location | Postal Code |
| Batu | 731106 |
| Tssinkaina | 731106 |
| Birniwa | 731106 |
| Unguwa | 731106 |
| Burseli | 731106 |
| Dagilfani | 731106 |
| Dangwalaeri | 731106 |
| Dingisa | 731106 |
| Dole | 731106 |
| Isfari | 731106 |
| Kachaliari | 731106 |
| Karanga | 731106 |
| Kazura | 731106 |
| Kilbu | 731106 |
| Kishinde | 731106 |
| Kukawa | 731106 |
| Machinamari | 731106 |
| Mungurum | 731106 |