| Place | Postal Code |
|---|---|
| 平生町 (Hiraomachi, Yamaguchi) | 742-1101 |
| 平生村 (Hiraomura, Yamaguchi) | 742-1102 |
| 小郡 (Oguni, Yamaguchi) | 742-1112 |
| 尾国 (Okuni, Yamaguchi) | 742-1113 |
| 大野北 (Onokita, Yamaguchi) | 742-1105 |
| 大野南 (Onominami, Yamaguchi) | 742-1106 |
| その他 (Others, Yamaguchi) | 742-1100 |
| 佐賀 (Saga, Yamaguchi) | 742-1111 |
| 佐合島 (Sagojima, Yamaguchi) | 742-1114 |
| 曽根 (Sone, Yamaguchi) | 742-1107 |
| 竪ケ浜 (Tategahama, Yamaguchi) | 742-1103 |
| 宇佐木 (Usanagi, Yamaguchi) | 742-1104 |
| Postal Codes in Kumage | |
|---|---|
| Hirao (平生町) | |
| Kaminoseki (上関町) | |
| Tabuse (田布施町) | |