| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Niinuma (相馬市) | 976-0011 |
| Postal/ZIP Codes in Nikkeshi (相馬市) | 979-2522 |
| Postal/ZIP Codes in Nishiyama (相馬市) | 976-0041 |
| Postal/ZIP Codes in Obama (相馬市) | 976-0022 |
| Postal/ZIP Codes in Okinochi (相馬市) | 976-0016 |
| Postal/ZIP Codes in Omagari (相馬市) | 976-0032 |
| Postal/ZIP Codes in Ono (相馬市) | 976-0053 |
| Postal/ZIP Codes in Onodai (相馬市) | 976-0001 |
| Postal/ZIP Codes in Others (相馬市) | 976-0000 |
| Postal/ZIP Codes in Otsubo (相馬市) | 976-0007 |
| Postal/ZIP Codes in Shiinoki (相馬市) | 976-0002 |
| Postal/ZIP Codes in Tachiya (相馬市) | 979-2531 |
| Postal/ZIP Codes in Tamano (相馬市) | 976-0154 |
| Postal/ZIP Codes in Tomizawa (相馬市) | 979-2532 |
| Postal/ZIP Codes in Tsubota (相馬市) | 979-2533 |
| Postal/ZIP Codes in Tsukanobe (相馬市) | 976-0003 |
| Postal/ZIP Codes in Tsukanomachi (相馬市) | 976-0015 |
| Postal/ZIP Codes in Wada (相馬市) | 976-0023 |
| Postal/ZIP Codes in Yamakami (相馬市) | 976-0151 |
| Postal/ZIP Codes in Yunuki (相馬市) | 979-2512 |