| Locality | Post Code |
|---|---|
| Oshimamachi (八代市) | 866-0035 |
| Otemachi (八代市) | 866-0852 |
| Others (八代市) | 866-0000 |
| Sakamotomachi Arase (八代市) | 869-6115 |
| Sakamotomachi Ayugaeri (八代市) | 869-6104 |
| Sakamotomachi Fukami (八代市) | 869-6102 |
| Sakamotomachi Hagi (八代市) | 869-6111 |
| Sakamotomachi Ichinomata (八代市) | 869-6114 |
| Sakamotomachi Kamase (八代市) | 869-6112 |
| Sakamotomachi Kawatake (八代市) | 869-5221 |
| Sakamotomachi Kudaragikami (八代市) | 869-5225 |
| Sakamotomachi Kudaragishimo (八代市) | 869-5224 |
| Sakamotomachi Nakatani (八代市) | 869-6103 |
| Sakamotomachi Nakatsumichi (八代市) | 869-6113 |
| Sakamotomachi Saibu (八代市) | 869-6101 |
| Sakamotomachi Sakamoto (八代市) | 869-6105 |
| Sakamotomachi Tagami (八代市) | 869-5223 |
| Sakamotomachi Tsurubami (八代市) | 869-5222 |
| Sanrakucho (八代市) | 866-0017 |
| Senchomachi Kogade (八代市) | 869-4704 |
| Senchomachi Omuta (八代市) | 869-4701 |
| Senchomachi Shimmuta (八代市) | 869-4703 |
| Senchomachi Yoshiomaru (八代市) | 869-4702 |
| Sendammachi (八代市) | 866-0054, 866-0053 |
| Shikigawachimachi (八代市) | 869-5151 |
| Shimadamachi (八代市) | 866-0827 |