| Locality | Postal Code |
|---|---|
| Akagawa (大分市) | 870-0317 |
| Akebonodai (大分市) | 870-0273 |
| Akegawara (大分市) | 870-0857 |
| Akenohaitsu (大分市) | 870-0168 |
| Akenohigashi (大分市) | 870-0161 |
| Akenokita (大分市) | 870-0165 |
| Akenokitamachi (大分市) | 870-0166 |
| Akenokoyodai (大分市) | 870-0167 |
| Akenominami (大分市) | 870-0163 |
| Akenonishi (大分市) | 870-0164 |
| Akenotakao (大分市) | 870-0162 |
| Amagase (大分市) | 870-0858 |
| Ando (大分市) | 879-7504 |
| Aobadai (大分市) | 870-0875 |
| Aobamachi (大分市) | 870-0908 |
| Aosaki (大分市) | 870-0278 |
| Asahimachi (大分市) | 870-0884 |
| Ashizaki (大分市) | 870-0014 |
| Baba (大分市) | 879-2112 |
| Benten (大分市) | 870-0017 |
| Bunyo (大分市) | 870-0855 |
| Chiyomachi (大分市) | 870-0033 |
| Chuomachi (大分市) | 870-0035 |
| Dannoharu (大分市) | 870-1124 |
| Ebisumachi (大分市) | 870-0322 |
| Enokuma (大分市) | 870-0889 |