| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Sadanaicho (釜石市) | 026-0053 |
| Postal/ZIP Codes in Sakuragicho (釜石市) | 026-0046 |
| Postal/ZIP Codes in Shimmachi (釜石市) | 026-0043 |
| Postal/ZIP Codes in Shinhamacho (釜石市) | 026-0015 |
| Postal/ZIP Codes in Sumiyoshicho (釜石市) | 026-0044 |
| Postal/ZIP Codes in Suzukocho (釜石市) | 026-0031 |
| Postal/ZIP Codes in Tadakoecho (釜石市) | 026-0021 |
| Postal/ZIP Codes in Tenjincho (釜石市) | 026-0023 |
| Postal/ZIP Codes in Tonicho (釜石市) | 026-0121, 026-0061 |
| Postal/ZIP Codes in Unosumaicho (釜石市) | 026-0301 |
| Postal/ZIP Codes in Uogashi (釜石市) | 026-0012 |
| Postal/ZIP Codes in Ureishicho (釜石市) | 026-0003 |
| Postal/ZIP Codes in Yagumocho (釜石市) | 026-0035 |