| Place | Postal Code |
|---|---|
| 新町 (Aramachi, Yamagata) | 999-5312 |
| 平岡 (Hiraoka, Yamagata) | 999-5311 |
| 釜渕 (Kamabuchi, Yamagata) | 999-5604 |
| 川ノ内 (Kawanochi, Yamagata) | 999-5301, 999-5601 |
| 木ノ下 (Kinoshita, Yamagata) | 999-5314 |
| 及位 (Nozoki, Yamagata) | 999-5602 |
| 大沢 (Osawa, Yamagata) | 999-5521 |
| 大滝 (Otaki, Yamagata) | 999-5603 |
| その他 (Others, Yamagata) | 999-5300 |
| 差首鍋 (Sasunabe, Yamagata) | 999-5522 |
| 内町 (Uchimachi, Yamagata) | 999-5313 |
| Postal Codes in Mogami | |
|---|---|
| Funagata (舟形町) | |
| Kaneyama (金山町) | |
| Mamurogawa (真室川町) | |
| Mogami (最上町) | |
| Okura (大蔵村) | |
| Sakegawa (鮭川村) | |
| Tozawa (戸沢村) | |