The following are the zip codes in the municipalities and cities of Masbate.
| Region | Provinces | City/Municipality | Zip Code |
| Region 5 (Bicol Region) | Masbate | Mandaon | 5411 |
| Region 5 (Bicol Region) | Masbate | Masbate | 5400 |
| Region 5 (Bicol Region) | Masbate | Milagros | 5410 |
| Region 5 (Bicol Region) | Masbate | Mobo | 5401 |
| Region 5 (Bicol Region) | Masbate | Monreal | 5418 |
| Region 5 (Bicol Region) | Masbate | Palanas | 5404 |
| Region 5 (Bicol Region) | Masbate | Pio V. Corpuz | 5406 |
| Region 5 (Bicol Region) | Masbate | Placer | 5408 |
| Region 5 (Bicol Region) | Masbate | San Fernando | 5416 |
| Region 5 (Bicol Region) | Masbate | San Jacinto | 5417 |
| Region 5 (Bicol Region) | Masbate | San Pascual | 5420 |
| Region 5 (Bicol Region) | Masbate | Uson | 5402 |
| Region 5 (Bicol Region) | Masbate | Claveria | 5419 |
| Region 5 (Bicol Region) | Masbate | Aroroy | 5414 |
| Region 5 (Bicol Region) | Masbate | Baleno | 5413 |
| Region 5 (Bicol Region) | Masbate | Balud | 5412 |
| Region 5 (Bicol Region) | Masbate | Batuan | 5415 |
| Region 5 (Bicol Region) | Masbate | Cataingan | 5405 |
| Region 5 (Bicol Region) | Masbate | Cawayan | 5409 |
| Region 5 (Bicol Region) | Masbate | Dimasalang | 5403 |
| Region 5 (Bicol Region) | Masbate | Esperanza | 5407 |
