| Locality | Post Code |
|---|---|
| Koamikurahama (石巻市) | 986-2414 |
| Kobuchihama (石巻市) | 986-2415 |
| Kodakehama (石巻市) | 986-2116 |
| Kofunakoshi (石巻市) | 986-0132 |
| Kokucho (石巻市) | 986-0825 |
| Koyocho (石巻市) | 986-0863 |
| Kozumihama (石巻市) | 986-2342 |
| Kugunarihama (石巻市) | 986-2527 |
| Kyubunhama (石巻市) | 986-2411 |
| Maeamihama (石巻市) | 986-2406 |
| Maeyachi (石巻市) | 987-1101 |
| Magura (石巻市) | 986-0106 |
| Makinohama (石巻市) | 986-2347 |
| Mangokucho (石巻市) | 986-2115 |
| Mano (石巻市) | 986-0002 |
| Maruido (石巻市) | 986-0865 |
| Matsubaracho (石巻市) | 986-2134 |
| Matsunami (石巻市) | 986-0028 |
| Megumino (石巻市) | 986-0868 |
| Midoricho (石巻市) | 986-0021 |
| Mikawacho (石巻市) | 986-0846 |
| Minamihamacho (石巻市) | 986-0835 |
| Minaminakasato (石巻市) | 986-0814 |
| Minamiyachi (石巻市) | 986-0852 |
| Minamizakai (石巻市) | 986-0031 |
| Minato (石巻市) | 986-0011 |