| Locality | Postal Code |
|---|---|
| Akagi (相馬市) | 979-2521 |
| Awazu (相馬市) | 976-0152 |
| Babano (相馬市) | 976-0036 |
| Chorouchi (相馬市) | 976-0004 |
| Dozuki (相馬市) | 976-0031 |
| Haragama (相馬市) | 976-0021 |
| Hatsuno (相馬市) | 976-0051 |
| Higashitamano (相馬市) | 976-0153 |
| Hodota (相馬市) | 976-0035 |
| Imada (相馬市) | 979-2541 |
| Ishigami (相馬市) | 976-0006 |
| Isobe (相馬市) | 979-2501 |
| Iwanoko (相馬市) | 976-0025 |
| Kabaniwa (相馬市) | 979-2511 |
| Kashiwazaki (相馬市) | 976-0034 |
| Kitaiibuchi (相馬市) | 976-0014 |
| Kitakoizumi (相馬市) | 976-0012 |
| Koizumi (相馬市) | 976-0013 |
| Koyo (相馬市) | 976-0005 |
| Kuroki (相馬市) | 976-0052 |
| Minamiiibuchi (相馬市) | 976-0026 |
| Motowaro (相馬市) | 976-0024 |
| Nakamura (相馬市) | 976-0042 |
| Nakano (相馬市) | 976-0037 |
| Narita (相馬市) | 979-2542 |
| Niida (相馬市) | 976-0033 |