| Place | Post Code |
|---|---|
| 原 (Hara, Yamagata) | 990-0712 |
| 本道寺 (Hondoji, Yamagata) | 990-0735 |
| 入間 (Irima, Yamagata) | 990-0714 |
| 岩根沢 (Iwanezawa, Yamagata) | 990-0743 |
| 海味 (Kaishu, Yamagata) | 990-0702 |
| 間沢 (Mazawa, Yamagata) | 990-0703 |
| 水沢 (Mizusawa, Yamagata) | 990-0742 |
| 睦合 (Mutsuai, Yamagata) | 990-0701 |
| 沼山 (Numayama, Yamagata) | 990-0713 |
| 大井沢 (Oisawa, Yamagata) | 990-0721 |
| その他 (Others, Yamagata) | 990-0700 |
| 志津 (Shizu, Yamagata) | 990-0734 |
| 砂子関 (Sunagoseki, Yamagata) | 990-0732 |
| 月岡 (Tsukioka, Yamagata) | 990-0731 |
| 月山沢 (Tsukiyamazawa, Yamagata) | 990-0733 |
| 綱取 (Tsunatori, Yamagata) | 990-0741 |
| 吉川 (Yoshikawa, Yamagata) | 990-0711 |
| Postal Codes in Nishimurayama | |
|---|---|
| Asahi (朝日町) | |
| Kahoku (河北町) | |
| Nishikawa (西川町) | |
| Oe (大江町) | |