| Locality | Post Code |
|---|---|
| Matsuzaki Tsurumaki (気仙沼市) | 988-0144 |
| Matsuzaki Urada (気仙沼市) | 988-0114 |
| Matsuzaki Yanagisawa (気仙沼市) | 988-0141 |
| Mawaridate (気仙沼市) | 988-0604 |
| Mikkamachi (気仙沼市) | 988-0085 |
| Minamigaoka (気仙沼市) | 988-0023 |
| Minamimachi (気仙沼市) | 988-0017 |
| Minamimachikaigan (気仙沼市) | 988-0018 |
| Minatomachi (気仙沼市) | 988-0021 |
| Misakuhama (気仙沼市) | 988-0631 |
| Monokurayama (気仙沼市) | 988-0169 |
| Motohamacho (気仙沼市) | 988-0003 |
| Motomachi (気仙沼市) | 988-0074 |
| Motoyoshicho Akaushi (気仙沼市) | 988-0284 |
| Motoyoshicho Amagasawa (気仙沼市) | 988-0277 |
| Motoyoshicho Bonokura (気仙沼市) | 988-0383 |
| Motoyoshicho Domeki (気仙沼市) | 988-0269 |
| Motoyoshicho Fuchu (気仙沼市) | 988-0281 |
| Motoyoshicho Fukahagi (気仙沼市) | 988-0363 |
| Motoyoshicho Gounosawa (気仙沼市) | 988-0351 |
| Motoyoshicho Hatanosawa (気仙沼市) | 988-0314 |
| Motoyoshicho Hayashinosawa (気仙沼市) | 988-0302 |
| Motoyoshicho Higashikawauchi (気仙沼市) | 988-0389 |
| Motoyoshicho Hikado (気仙沼市) | 988-0276 |
| Motoyoshicho Hiragai (気仙沼市) | 988-0333 |
| Motoyoshicho Horasawa (気仙沼市) | 988-0263 |