The following are the zip codes in the municipalities of Quirino.
| Region | Provinces | City/Municipality | Zip Code |
| Region 2 (Cagayan Valley) | Quirino | Aglipay | 3403 |
| Region 2 (Cagayan Valley) | Quirino | Cabarroguis | 3400 |
| Region 2 (Cagayan Valley) | Quirino | Diffun | 3401 |
| Region 2 (Cagayan Valley) | Quirino | Maddela | 3404 |
| Region 2 (Cagayan Valley) | Quirino | Nagtipunan | 3405 |
| Region 2 (Cagayan Valley) | Quirino | Saguday | 3402 |
