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