The following are the zip codes in the municipalities of Apayao.
| Region | Provinces | City/Municipality | Zip Code |
| CAR (Cordillera Administrative Region) | Apayao | Santa Marcela | 3811 |
| CAR (Cordillera Administrative Region) | Apayao | Calanasan | 3814 |
| CAR (Cordillera Administrative Region) | Apayao | Conner | 3807 |
| CAR (Cordillera Administrative Region) | Apayao | Flora | 3810 |
| CAR (Cordillera Administrative Region) | Apayao | Kabugao | 3809 |
| CAR (Cordillera Administrative Region) | Apayao | Luna | 3813 |
| CAR (Cordillera Administrative Region) | Apayao | Pudtol | 3812 |
